49543166 Audi a4 b4 Engine TDI 1 9 1Z and AHU Service Manual

Engine data

Engine code 1Z AHUManufactured 06.95 > 08.96 >Capacity ltr 1.9 1.9Power output kW at rpm 66/4000 66/4000Torque Nm at rpm 202 202

1900 1900Bore mm 79.5 79.5Stroke mm 95.5 95.5Compression ratio 19.5: 1 19.5: 1CN not less than 45 45Firing order 1-3-4-2 1-3-4-2Catalytic converter yes yesExhaust gas recirculation yes yesCharging yes yesCharge air cooler yes yes

Engine code 1Z AHUValve timingAt 1 mm valve lift and 0 mm valve clearanceInlet opens after TDC 16° 16°Inlet closes after BDC 25° 25°Exhaust opens before BDC 28° 28°Exhaust closes before TDC 19° 19°

CUTRemoving and installing engine

Special tools and workshop equipment required

Engine support bracket 10-222 A

Lifting tackle 2024 A

Special tool 3147

V.A.G 1202 A

V.A.G 1306

Special tool Matra V/175

Removing

Notes:

The engine is lifted out without the gearbox.

Catch drained-off coolant in a clean container for re-use or disposal.

All cable ties which are opened or cut open when removing the engine must be replaced in the same position when installing the engine. - Obtain radio code on vehicles with coded radio. - With ignition switched off disconnect battery earth strap.

Warning!Hot steam can escape when the cap on the expansion tank is opened. Cover the cap with a cloth, and open it carefully.

- Open cap on coolant expansion tank. - Remove noise insulation (two sections) -arrows-. - Place drip tray V.A.G 1306 below engine.

900058 Type4A

Type description

- Turn drain screw -arrowon radiator anti-clockwise, if necessary fit drain hose to connection.

- To drain off remaining coolant, disconnect coolant hoses -arrows-.

900058 Type4A

Type description - Slacken bolts 2 ... 6. - Slacken V-belt by loosening tensioning nut -1-. - Remove V-belt.

900058 Type4A

- Unbolt vane pump for power steering and bracket (at rear) -arrows-. Do not disconnect hydraulic connections. - Secure vane pump to body with wire to avoid overtensioning the hydraulic connections.

- Disconnect positive wire to fan motor at series resistance -arrow-. - Installation position: behind front bumper, on left. - Move wiring clear.

900058 Type4A

Type description - Unbolt torque reaction support from engine and cross member -arrows-.

- Disconnect bottom air hose -3- from charge air cooler. - Disconnect wiring-1-from alternator. - Unbolt earth wire -2- from longitudinal member.

900058 Type4A

Type description

- Unbolt starter from engine/gearbox and secure as necessary.Note: Starter cables do not have to be disconnected.

Vehicles with automatic gearbox - Unscrew 3 torque converter nuts through starter opening using Matra V/175 15 mm A/F socket attachment (turn crankshaft 1/3 turn each time).Note: When loosening torque converter bolts, counterhold crankshaft by applying spanner to central bolt on vibration damper. All models - Unscrew engine/gearbox securing bolts accessible from below

900058 Type4A

Type description - Remove engine cover panel -arrows-.

- Remove air intake pipe -arrow- between lock carrier and air cleaner housing.

900058 Type4A

Type description - Unscrew earth connection to fan motor at earth point -arrow- at front left of engine compartment. - Unbolt radiator fan cowl from radiator and lift out.

- Disconnect wires/unplug connectors as follows: 1 -Exhaust gas recirculation valve -N18 2 -Air mass meter -G70 4 -Charge pressure control solenoid valve -N75 5 -Intake manifold temperature sender -G72 - Disconnect vacuum hose from mechanical exhaust gas recirculation valve-3-. - Disconnect thin hose-6-from bottom of valve for exhaust gas recirculation -N18. - Move wiring and hoses clear. - Disconnect air hose from air mass meter. - Remove upper section of air cleaner housing with air mass meter.

900058 Type4A

Type description - Unbolt charge pressure control solenoid valve -2- from air duct -1-. Do not disconnect hoses. - Remove air duct-1-between charge air cooler and intake manifold. - Remove air intake hose between charge air cooler and turbocharger.Vehicles with air conditioner: - Remove ribbed belt => Page 13-11. - Remove lower section of air cleaner housing. - Disconnect connector on A/C compressor. Warning!The air conditioner refrigerant circuit must not be opened.

- Remove A/C compressor and secure to body with wire. All models

- Unscrew bolts securing turbocharger to catalytic converter -arrows-. - Disconnect front exhaust pipe with catalytic converter from turbocharger.Note: Secure the flange of the front exhaust pipe to the right suspension turret with wire. It is then not necessary to remove the front exhaust pipe.

900058 Type4A

Type description - Disconnect wires/unplug connectors as follows: 1 -Injection pump 2 -Injection pump 3 -Wiring for engine speed sender -G28 4 -Needle lift sender -G80 5 -Coolant temperature sender -G62 6 -Electronic thermo switch -F76 7 -Oil pressure switch -F1 8 -Oil temperature sender -G8 - Unplug connectors from glow plugs. - Unplug connector from speedometer sender -G22 on left of gearbox, and move wire clear.

900058 Type4A

Type description

- Unplug connector for reversing light switch on gearbox, and move wire clear.All models - Disconnect diesel supply and return pipes -arrows- at injection pump and move clear to one side. Note: Use clean plugs to block off the pipes.

- Disconnect coolant hoses -arrows-. - Remove hose with non-return valve from exhauster pump. - Unscrew upper engine/gearbox securing bolts. Leave one bolt in place (hand-tight).

Vehicles with manual gearbox:

4A - Unscrew top nuts -arrowon left and right engine mounts.

- Position support bar 10-222 A on bolted flanges of wing panels -arrows-.Note: Support bar must be positioned behind gas strut for bonnet, and spindles must face forwards. - Engage gearbox support 3147 in top right bolt hole in bell housing on gearbox, as illustrated. Notes:

The height of the gearbox can be adjusted via the wing nut on the lifting hook.

Do not overtension, otherwise the pressure pipe for the clutch slave cylinder could be damaged (on manual gearbox).

The illustration shows the engine removed.

- Attach lifting tackle 2024 A to engine and hook onto workshop crane V.A.G 1202 A.Note: To balance the centre of gravity of the engine, position the hook attachments as shown in the illustration. WarningThe hook attachments and locating pins on the lifting tackle must be secured with locking pins (arrows in illustration).

- Remove the last securing bolt. Note: Check that all hoses and other connections between engine and body have been detached. - Lift engine over studs of engine mounts. - Tighten spindle of support bar 10-222 A. - Raise engine carefully and lift out. Vehicles with automatic gearbox - Secure torque converter in gearbox to prevent it falling out.

Attaching engine to engine stand Special tools and workshop equipment required

Engine and gearbox support VW 540

Work sequence

When working on the engine, secure it to the engine stand using engine bracket VW 540.

Installing

Installation is carried out in the reverse order, when doing this note the following: Notes:

When performing repairs, renew seals, gaskets, self-locking nuts and bolts which have a specified tightening angle.

Secure all hose connections with the correct hose clips (same as original equipment) => Parts catalogue - Check whether the two dowel sleeves for centring engine and gearbox are in the cylinder block, install if necessary. - Push intermediate plate onto dowel sleeves. Vehicles with manual gearbox - Clean input shaft splines and (in the case of used clutch plates) the hub splines. Remove corrosion and apply only a very thin coating of grease G 000 100 to the splines. Do not grease guide sleeve. - Check clutch release bearing for wear and renew if necessary. - Check that clutch plate is properly centred in vehicles with manual gearbox. - A needle bearing must be fitted in the crankshaft on vehicles with manual gearbox. Install needle bearing if necessary => Page 13-53. Vehicles with automatic gearbox - In vehicles with automatic gearbox, no needle bearing must be fitted in the crankshaft. Remove needle bearing if necessary => Page 13-53. - To secure the torque converter on the drive plate only use the correct nuts as specified in the parts catalogue.

=> Parts catalogue - Tighten torque converter nuts with special tool Matra V/175.

- Before installing engine, rotate torque converter and drive plate so that one hole and one stud are level with the aperture for the starter motor.Checking position of torque converter If the torque converter has been installed correctly, distance-A-between the joint surface on the torque converter bellhousing and the bottom contact surface on the torque converter studs should be approx 23 mm. If the torque converter has not been installed properly, the distance will be about 13 mm.

If the torque converter is incorrectly inserted in the gearbox, the driver of the torque converter or the ATF pump will be severely damaged when the gearbox is attached to the engine.

- Check ATF level: => Automatic gearbox 01N; Repair group 37; Checking and changing ATF; Checking ATF level and topping up ATF=> All models - Ensure that engine mounts are free of stress by shaking engine to align it before tightening engine mounts. - Allow stop for torque reaction support to rest on rubber buffer for torque reaction support under its own weight, and tighten bolts. - Install ribbed belt =>Page 13-12. - Fill up with coolant=> Page 19-7.

1Z CUT Drained-off coolant may only be used again if the original cylinder head or cylinder block are re-installed.

Coolant must not be used again if it is dirty. - Stress-free alignment of exhaust system => Page 26-10. - Electrical connections and routing: => Current flow diagrams, Electrical fault finding and Fitting locations - Connect EGR hoses and pipes => Diagram of vacuum hose connections, Page 26-15. - Connect hoses and pipes for charge pressure control system => Diagram of connections, Page 21-2. - After connecting battery, enter anti-theft code for radio => Radio operating instructions

The electronic control units can be damaged if a rapid charger is used to start the engine.

- Close windows fully using electric window switches. - Then operate all electric window switches again for at least one second in the "close" direction to activate the automatic one -touch function. - Set clock to correct time. - Check oil level before starting engine. - Interrogate fault memory:

=> Diesel direct injection and glow plug system (4-cyl. TDI); Repair group 01; Interrogating and erasing fault memory=>Note:

Faults will have been stored in the memory because connectors have been unplugged. Therefore interrogate and erase fault memory after installing engine.

Notes:

Tightening torques

Notes:

The tightening torques listed on this page apply only to lightly greased, oiled, phosphated, or black-finished nuts and bolts.

Additional lubricant such as engine or gearbox oil may be used, but do not use graphite lubricant.

Do not use degreased parts.

Tolerance for tightening torques is ±15%.

Engine/gearbox mountings (manual gearbox)

Item No. Bolt Nm1, 3, 4 M12 x 67 652, 6 M12 x 90 655, 11 M12 x 110 657, 8 1), 9, 10 M10 x 45 45

1)M8 bolt fitted up to approx. 07.96: tightening torque 25 Nm A: centering sleeves

Engine/gearbox mountings (automatics)

Item No. Bolt Nm1, 8, 9, 10 M10 x 45 452, 3, 4, 11 M12 x 67 65

5 M12 x 110 656 M12 x 90 657 M10 x 60 45

A: centering sleeves

Component NmBolts/nuts M6 10

M8 20M10 45M12 65

Except for the following:Engine mount to subframe 25Engine support to engine mount 25Torque reaction support M8 20

M10 40Drive plate totorque converter M10 x1 85A/C compressor to compressor bracket 25Power steering pump to bracket 25Catalytic converter to turbocharger 25Hose clamps 2

Dismantling and assembling engine

Ribbed belt drive for alternator, V-belt drive for coolant pump and vane pump

Notes:

The following illustration shows the belt drive on vehicles without air conditioner.

Mark the direction of rotation before removing the ribbed belt. If the belt rotates in the wrong direction when it is refitted, this can cause breakage. Ensure that the belt is properly seated in the pulleys when installing.

1 - V-belt For coolant pump For vane pump Check for wear Removing and installing => Page 13-9 2 - 25 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening. 3 - Bolt Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm=> Parts catalogue If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening.

4 - Pulley For vibration damper V-belt version 5 - Ribbed belt Check for wear Removing and installing => Page 13-11 6 - Cover cap Prise off with screwdriver 7 - Tensioning roller For ribbed belt Removing and installing ribbed belt => Page 13-11 8 - 65 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening.

9 - Pulley For alternator For ribbed belt 10 - 25 Nm 11 - Alternator Removing: - Disconnect battery earth strap - Remove ribbed belt - Loosen bolts on alternator (top and bottom) - Detach alternator and unscrew wiring connections To facilitate positioning of alternator, knock back bush for bottom retaining bolt on bracket slightly 12 - Lever For tensioning roller Engage flats on end of lever in tensioning element -Item 17-

13 - 25 Nm 14 - Seal 15 - 25 Nm 16 - 10 Nm 17 - Tensioning element Removing: - Remove ribbed belt =>Page 13-11. Engage on flats on lever for tensioning roller -Item 12- 18 - Bracket For alternator 19 - 25 Nm

20 - Vibration damper For ribbed belt With pulley for V-belt Can only be installed in one position. Holes are off-set 21 - Coolant pump Check that pump runs freely Removing and installing => Page 19-11 22 - Bolt Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm=> Parts catalogue 23 - Bracket For vane pump

24 - Bolt/nut Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm Tighten nut to 25 Nm=> Parts catalogue 25 - 25 Nm 26 - Rear bracket For vane pump 27 - Vane pump For power steering Removing and installing: => Running gear, Front-wheel drive and four-wheel drive; Repair Group 48; Assembly overview: Vane pump; Vehicles with 4-cylinder engine 28 - 25 Nm

29 - Frontbracket For vane pump 30 - Retainer 31 - 25 Nm 32 - Bolt - 25 Nm With tensioner nut 33 - Pulley For vane pump V-belt version 34 - 25 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening. 35 - 25 Nm 36 - Pulley For coolant pump V-belt version

Ribbed belt drive for alternator, V-belt drive for coolant pump and vane pump

Notes:

The following illustration shows the belt drive on vehicles without air conditioner.

Mark the direction of rotation before removing the ribbed belt. If the belt rotates in the wrong direction when it is refitted, this can cause breakage. Ensure that the belt is properly seated in the pulleys when installing.

1 - V-belt For coolant pump For vane pump Check for wear Removing and installing => Page 13-9 2 - 25 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening. 3 - Bolt Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm=> Parts catalogue If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening.

4 - Pulley For vibration damper V-belt version 5 - Ribbed belt Check for wear Removing and installing => Page 13-11 6 - Cover cap Prise off with screwdriver 7 - Tensioning roller For ribbed belt Removing and installing ribbed belt => Page 13-11 8 - 65 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening.

9 - Pulley For alternator For ribbed belt 10 - 25 Nm 11 - Alternator Removing: - Disconnect battery earth strap - Remove ribbed belt - Loosen bolts on alternator (top and bottom) - Detach alternator and unscrew wiring connections To facilitate positioning of alternator, knock back bush for bottom retaining bolt on bracket slightly 12 - Lever For tensioning roller Engage flats on end of lever in tensioning element -Item 17-

13 - 25 Nm 14 - Seal 15 - 25 Nm 16 - 10 Nm 17 - Tensioning element Removing: - Remove ribbed belt =>Page 13-11. Engage on flats on lever for tensioning roller -Item 12- 18 - Bracket For alternator 19 - 25 Nm

20 - Vibration damper For ribbed belt With pulley for V-belt Can only be installed in one position. Holes are off-set 21 - Coolant pump Check that pump runs freely Removing and installing => Page 19-11 22 - Bolt Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm=> Parts catalogue 23 - Bracket For vane pump

24 - Bolt/nut Bolt with strength rating 8.8: tighten to 25 Nm Bolt with strength rating 10.9: tighten to 35 Nm Tighten nut to 25 Nm=> Parts catalogue 25 - 25 Nm 26 - Rear bracket For vane pump 27 - Vane pump For power steering Removing and installing: => Running gear, Front-wheel drive and four-wheel drive; Repair Group 48; Assembly overview: Vane pump; Vehicles with 4-cylinder engine=> 28 - 25 Nm

29 - Frontbracket For vane pump 30 - Retainer 31 - 25 Nm 32 - Bolt - 25 Nm With tensioner nut 33 - Pulley For vane pump V-belt version 34 - 25 Nm If necessary, brace pulley with strap wrench (oil filter wrench) when loosening and tightening. 35 - 25 Nm 36 - Pulley For coolant pump V-belt version

Removing and installing V-belt - Slacken bolts 2 ... 6. - Slacken V-belt by turning tensioner nut -1-. - Remove V-belt.Installation is performed in the reverse order. - Check that V-belt is properly seated. - Routing of belt=>Page 13-13 - Tensioning V-belt=>Page 13-10.

Tensioning V-belt

- Slacken bolts 2 ... 6. - Adjust belt tension with tensioner nut -1-. - Check tension of V-belt: - Press in the belt firmly with the thumb at a point half-way between the pulleys with the longest run of belt.The amount of yield should be as follows:

V-belt for coolant pump and and vane pump Belt yield (max.) New V-belt 2 mm Used V-belt 5 mm

- TIghten securing bolts on vane pump. Tightening torques

Component NmVane pump to bracket 25Vane pump to tensioning bar 25

Removing and installing ribbed belt

Removing

Note: Mark the direction of rotation with chalk or felt pen before removing the ribbed belt. If the belt rotates in the wrong direction when it is refitted, it may break. - Remove V-belt=>Page 13-9. - Detach cover cap -Item 6-, Page 13-3, from tensioning roller.

- To slacken ribbed belt tensioning roller, apply 17 mm socket with extension to central nut. - To slacken ribbed belt, turn tensioning element in direction of arrow. - Remove ribbed belt and release tensioning element.

- Turn ribbed belt tensioning element in direction of arrow. - Fit ribbed belt over alternator pulley last. Release tensioning element.Note: Ensure that the ribbed belt is properly seated in the pulleys when installing. - Install V-belt=>Page 13-9. - Routing of belts=>Page 13-13 - Press on cover cap -Item 6-, Page 13-3, for tensioning roller. - Start engine and check that belts run properly.

Installing

- Fit ribbed belt over crankshaft pulley and tensioning element.

Routing of belts

- Routing of ribbed belt on vehicles without air conditioner.

- Routing of ribbed belt on vehicles with air conditioner.

Toothed belt drive

Note: Mark the direction of rotation with chalk or felt pen before removing the toothed belt. If a used belt rotates in the wrong direction when refitted, this can result in breakage. 1 - Toothed belt guard - top When installing, engage carefully in bottom toothed belt guard 2 - Toothed belt Mark direction of rotation with chalk or felt pen before removing Check for wear Removing=>Page 13-20 Installing=>Page 13-26

3 - 20 Nm 4 - Tensioning roller Checking semi-automatic toothed belt tensioning roller => Page 13-30 Position =>Fig.1, Page 13-18 5 - 45 Nm Counter-hold with 3036 to loosen and tighten 6 - Camshaft sprocket Release from camshaft taper by tapping with a hammer (using a drift through toothed belt guard opening) 7 - 25 Nm 8 - Idler roller 9 - 10 Nm 10 - Toothed belt guard - rear

11 - 10 Nm 12 - 25 Nm 13 - Woodruff key Check proper seating 14 - Injection pump sprocket Removing injection pump sprocket =>Fig. 3, Page 13-19 Check that Woodruff key is fitted correctly 15 - Intermediate shaft sprocket Installation position =>Fig. 2, Page 13-18 Check that Woodruff key is fitted correctly 16 - Crankshaft sprocket Contact surface between sprocket and crankshaft must be free of oil. Can only be installed in one position.

17 - 90 Nm + 1/4 turn (90 °) further Renew Do not use oil Use counter-hold tool 3099 or 3415 to loosen and tighten Bolting on counter-hold tool 3099 => Page 13-39 18 - 45 Nm Use counter-hold tool 3036 to loosen and tighten 19 - 45 Nm 20 - 10 Nm 21 - Toothed belt guard - bottom To remove, unbolt vibration damper 22 - Spreader clip

900058 Type4A

Type description1Z CUTFig.1Position of semi-automatic tensioning roller

The retaining lug must fit in the opening in the rear toothed belt guard.

Fig.2Installation position of intermediate shaft sprocket

The wider rim -arrows- of the intermediate shaft sprocket is at the front.

The side of the sprocket with the lettering is at the rear.

900058 Type4A

Type description1Z CUTFig.3Removing injection pump sprocket

Toothed belt removed => Page 13-20

- Unscrew nut for injection pump sprocket. - Release arms of puller 3032 and apply puller. - Align arms of puller with holes in injection pump sprocket and secure. - Apply tension to injection pump sprocket by tightening puller. - Release injection pump sprocket from taper of injection pump by lightly tapping spindle of puller (hold sprocket while doing this so it does not fall out).

Removing and installing toothed belt


Mandrel 2064

Setting bar 2065 A

Retainer 3036

Special tool Matra V/159

900058 Type4A

Type description - Remove engine cover panel -arrows-. - Remove V-belt=>Page 13-9. - Remove ribbed belt => Page 13-11.

- Unbolt pulley with vibration damper.

Removing

- Remove top and bottom sections of toothed belt guard -arrows-.

900058 Type4A

Type description - Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with manual gearbox).

- Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with automatic gearbox).Note: Turning crankshaft to TDC No. 1 cylinder with engine removed=> page 13-31. - Remove cylinder head cover =>Page 15-8.

900058 Type4A

Type description - Lock camshaft using setting bar 2065 A.

- Centralize setting bar as follows: With setting bar in position, turn camshaft so that one end of setting bar contacts cylinder head. Using feeler gauge, measure gap at other end of setting bar. Insert a feeler gauge corresponding to half the measured gap between setting bar and cylinder head. Now turn camshaft until setting bar contacts feeler gauge. Place a 2nd feeler gauge, of the same thickness, at the other end between setting bar and cylinder head.

- Lock injection pump sprocket with pin 2064. - Mark direction of rotation of toothed belt with chalk or felt pen. - Loosen tensioning roller. - Remove idler wheel. - Take off toothed belt.Installing (adjusting valve timing)

Camshaft locked in position with setting bar.

Injection pump locked in position with pin 2064. Notes:

The position of the toothed belt must be set as described below, even after repairs in which the belt is only taken off the camshaft sprocket.

The crankshaft must not be at TDC at any cylinder when the camshaft is turned. Otherwise there is a risk of damage to valves and piston crowns.

Never use the setting bar to hold the camshaft when loosening and tightening the bolt securing the camshaft sprocket. Counter-hold with 3036.

- Loosen camshaft sprocket securing bolt 1/2 turn. Release camshaft sprocket from camshaft taper by tapping with a hammer (using a drift through rear toothed belt guard opening). - Check again whether TDC mark on flywheel and reference mark are aligned. - Fit toothed belt (check direction of rotation) on crankshaft sprocket, intermediate shaft sprocket, injection pump sprocket and tensioning roller. - Fit camshaft sprocket together with toothed belt and locate with securing bolt (camshaft sprocket can still turn). - Install idler wheel.

- Using a suitable wrench (e.g. Matra V/159), turn eccentric mounting on tensioning roller clockwise until notch aligns with raised portion (arrows).Note: If the eccentric mounting is turned too far to the right (by mistake), slacken completely before re-tensioning. - Tighten lock nut on tensioning roller to 20 Nm. - Check again whether TDC mark on flywheel and reference mark are aligned. - Tighten bolt securing camshaft sprocket to 45 Nm. Note: On no account use the setting bar to hold the camshaft when loosening and tightening the bolt securing the camshaft sprocket. Counter-hold with 3036. - Remove setting bar. - Remove pin 2064. - Turn crankshaft two full revolutions in normal direction of rotation and set again to TDC No. 1 cylinder.

- Check tension of toothed belt. - Markings -arrows- should be in line. - Re-tension toothed belt if necessary. - Check whether injection pump sprocket can be locked with pin 2064. - Check position of camshaft with setting bar.Note: If the setting bar or pin do not fit in place, repeat adjustment procedure. - Remove setting bar. - Remove pin 2064. - Install ribbed belt =>Page 13-12. - Install V-belt=>Page 13-9. - Check injection pump commencement of delivery (dynamic)

=> Diesel direct injection and glow plug system (4-cylinder TDI);

=> Repair group 23; Servicing diesel direct injection system;=>

=> Dynamically checking and adjusting commencement of injection

Tightening torques

Component NmToothed belt sprocket to camshaft 45Idler wheel to console 25Semi-automatic tensioning roller to cylinder block

20Bottom section of toothed belt guard to cylinder block

10Vibration damper with 8.8 25pulley to crankshaft 10.9 35

Checking semi-automatic toothed belt tensioning roller

Test requirements

Toothed belt in position and tensioned. Test sequence

- Tension toothed belt with firm thumb pressure. Notch and raised portion -arrows- must move apart. - Release thumb pressure on toothed belt. The tensioning roller should move back to its initial position. - Markings -arrows- should be in line.

Turning crankshaft to TDC with engine removed


Adjustment bar 2068 A for top dead centre Vehicles with manual gearbox

Oil filter removed.

- Fit TDC adjuster gauge 2068 A with screw as illustrated. - Set adjuster gauge to 107 mm (the reference point is the left notch of the vernier -arrow-). - Turn crankshaft until TDC marking "0" on flywheel coincides with end of adjuster gauge.Vehicles with automatic gearbox

Oil filter removed.

- Fit TDC adjuster gauge 2068 A with screw as illustrated. - Set adjuster gauge to 99 mm -arrow- (the reference point is the left notch of the vernier -arrow-). - Turn crankshaft until TDC marking "0" on drive plate coincides with end of adjuster gauge.Note: TDC marking "0" is stamped into the cylinder block side of the drive plate.

Removing and installing sealing flanges and flywheel/drive plate

Note: For repairs to the clutch: => 5-Speed manual gearbox 012/01W, Front-wheel drive; Repair group 30; Servicing clutch=> 1 - Oil seal To remove, remove sealing flange -Item 27- Install with 10-203 Lightly oil sealing lip 2 - Intermediate shaft sprocket Installation position =>Fig. 1, Page 13-38 Check position of Woodruff key -Item 25-

3 - 45 Nm Use counter-hold 3036 to loosen and tighten 4 - 25 Nm 5 - Oil seal Renewing => Page 13-39 Lightly oil sealing lip of oil seal 6 - 10 Nm 7 - Front sealing flange Before fitting sump, apply a small amount of sealant "AMV 174 004 01"to sealing points between sealing flange and cylinder block 8 - Gasket Renew

900058 Type4A

Type description MY

9 - Cylinder block Removing and installing crankshaft => Page 13-48 Dismantling and assembling pistons and conrods => Page 13-57 10 - Vacuum pump For brake servo 11 - O ring Renew 12 - Cover 13 - 10 Nm 14 - 20 Nm 15 - Bracket For exhauster 16 - O ring Renew

900058 Type4A

Type description MY

17 - Oil seal Renew 18 - 10 Nm 19 - Rear sealing flange With oil seal Only renew complete Lightly oil sealing lip of oil seal Before fitting sump, apply a small amount of sealant "AMV 174 004 01"to sealing points between sealing flange and cylinder block 20 - Gasket Only install gasket if sealing flange has no sealing lip on cylinder block side 21 - Flywheel/drive plate Removing and installing flywheel => Page 13-44 Removing and installing drive plate =>Page 13-45

900058 Type4A

Type description MY

22 - 60 Nm + 1/4turn (90 °) further Renewing 23 - Intermediate plate Must be located on dowel sleeves Do not damage orbend when assembling 24 - Intermediate shaft Axial clearance max. 0.25 mm 25 - Woodruff key Check that Woodruff key is fitted correctly 26 - O ring Renew 27 - Sealing flange for intermediate shaft 28 - 25 Nm

900058 Type4A

Type description1Z CUTFig.1Installation position of intermediate shaft sprocket

The wider rim -arrows- of the intermediate shaft sprocket is at

the front.

The side of the sprocket with the lettering is at the rear.

Renewing crankshaft oil seal - pulley end -


Oil seal extractor 2085

Oil seal fitting tool 3083

Counter-hold tool (retainer) 3099

4A

- Remove ribbed belt => Page 13-11. - Remove toothed belt => Page 13-20. - Remove crankshaft toothed belt sprocket. To do this counter -hold sprocket with 3099.Note: Special tool 3415 can be used instead.

- Screw cheese-head bolt from 3083 five or six turns into crankshaft before applying oil seal extractor. - Unscrew inner part of the oil seal extractor 2085 two turns (approx. 3 mm) out of the outer part and lock with knurled screw.

Removing

Engine in vehicle

- Remove V-belt=>Page 13-9.

900058 Type4A

Type description

- Lubricate threaded head of oil seal extractor, place it in position and, exerting firm pressure, screw it as far as possible into oil seal. - Loosen knurled screw and turn inner part against crankshaft until the oil seal is pulled out. - Clamp flats of oil seal extractor in vice. Remove oil seal with pliers. - Clean contact surface and sealing surface.Installing - Lightly oil sealing lip of oil seal.

- Place guide sleeve from 3083 onto crankshaft journal. - Slide oil seal over guide sleeve.

4A - Press oil seal in onto stop using press sleeve and bolt from 3083. - Renew bolt for toothed belt sprocket. - Install crankshaft sprocket and lock in position with retainer 3099.Notes:

Contact surface between toothed belt sprocket and crankshaft must be free of oil.

Do not grease bolt for toothed belt sprocket. - Install toothed belt (adjust valve timing) => Page 13-26. - Allow stop for torque reaction support to rest on rubber buffer for torque reaction support under its own weight, and tighten bolts. - Install ribbed belt =>Page 13-12. - Install V-belt=>Page 13-9. Tightening torques

Component NmToothed belt sprocket to crankshaft 90 + 90°1)2)Torque reaction support M8 20

M10 40 1)Renew bolt 2)90° is a quarter turn

Removing and installing flywheel/ drive plate

Flywheel Special tools and workshop equipment required

Counter-hold tool 10-201 Work sequence

- Reverse position of retainer 10-201 for loosening/tightening bolts. - Mark position of flywheel relative to engine. - Renew bolts.Tightening torque

Component NmFlywheel to crankshaft 60 + 90°1) 1)90°= 1/4turn

900058 Type4A

Type description

Counter-hold tool VW 558

Hexagon bolt M8 x 45 and two M10 hexagon nuts

Depth gaugeRemoving

- Secure counter-hold tool VW 558 to the drive plate with a hexagon bolt M8x45. Place two M10 hexagon nuts -1- between counter-hold tool and drive plate. - Mark position of drive plate relative to engine. - Loosen securing bolts on drive plate.

Drive plateSpecial tools and workshop equipment required

900058 Type4A

Type description

- Locate drive plate with shim -2- and packing plate -1- .The lug -arrow- must face towards torque converter. - Insert at least 3 old securing bolts and tighten to 30 Nm.

- Measure distance -a- at three points and calculate average value. - Specified distance: 26 ... 28 mmIf the specification is exceeded:

Installing

900058 Type4A

Type description - Remove drive plate again and install without shim -2-. Tighten bolts to 30 Nm again. - Measure distance again.If the specification is attained: - Fit new bolts and tighten. Tightening torque

Component NmDrive plate to crankshaft 60 + 90°1) 1)90°= 1/4turn

Removing and installing crankshaft

Note: Secure engine to engine bracket VW 540 on assembly stand when dismantling/assembling engine. 1 - Thrust washers For bearing 3 Different versions for cylinder block and bearing cap Note fixing arrangement 2 - Bearing shell Bearing shell with oil groove for cylinder block Do not interchange used bearing shells (mark with waterproof pen)

3 - Crankshaft Axial clearance new: 0.07...0.17 mm Wear limit: 0.37 mm Check radial clearance with Plastigage New: 0.03...0.08 mm Wear limit: 0.17 mm Do not rotate the crankshaft when checking the radial clearance Crankshaft dimensions => Page 13-56 4 - Bearing shell Bearing shell without oil groove for bearing cap Do not interchange used bearing shells (mark with waterproof pen) 5 - Thrust washers For bearing 3 bearing cap Different versions for cylinder block and bearing cap Note fixing arrangement

6 - 65 Nm + 1/4turn (90 °) further Renewing When measuring radial clearance of crankshaft, tighten to 65 Nm but do not turn further 7 - Bearing cap Bearing cap 1: Pulley end Bearing cap 3 with recesses for thrust washers Bearing shell retaining lugs (cylinder block/bearing cap) must be on the same side 8 - 10 Nm + 1/4 turn (90 °) further Renew Always renew sender wheel if bolts have been unscrewed =>Fig.1, Page 13-52

9 - Needle bearing Pulling out and driving in => Page 13-53 10 - Sender wheel For engine speed sender (G28) Can only be installed in one position. Holes are off-set Always renew sender wheel if securing bolts have been unscrewed Removing and installing =>Fig. 1, Page 13-52 11 - Fitted pin Checking projection from crankshaft=>Fig. 2, Page 13-52

4A 1Z CUTFig.1Removing and installing sender wheel - Always renew sender wheel -2- if securing bolts -1- have been unscrewed. Notes:

If the securing bolts are tightened a second time, the seats for the countersunk bolt heads in the sender wheel will be distorted to such an extent that the bolt heads will come into direct contact with the crankshaft -3- (-arrows-) and the sender wheel will only fit loosely under the bolts.

The mounting holes are asymmetrically spaced, so it is only possible to install the sender wheel in one position. Tightening torque

Component NmSender wheel to crankshaft 10 + 90° 1)2)

1)Renew bolts 2)90° is a quarter turn Fig. 2Checking dowel pin projection out of crankshaft Dowel pin projection -3- out of crankshaft

a =2.5...3.0 mm

Removing and installing needle bearing in crankshaft


Drift VW 207 C

Special tool Kukko 21/1 (Item 1) and Kukko 22/1 (Item 4)

Notes:

A needle bearing must be fitted in the crankshaft on vehicles with manual gearbox. Install needle bearing if necessary.

The needle bearing must not be fitted in the crankshaft on vehicles with automatic gearbox. Remove needle bearing if necessary.

900058 Type4A

Type description

- Pull out needle bearing using Kukko 21/1 and Kukko 22/1.

Installing

- Knock in with drift VW 207 C or centring mandrel 3176. - Lettering on needle bearing must be visible when installed.

Removing

4A 1ZInstallation depth for needle bearing

Distance a = 1.5 mm

Crankshaft dimensions

(in mm)

Honing dimension Main journal dia. Conrod journaldia.

-0.022 -0.022Basic dimension 54.00 47.80

-0.042 -0.042-0.022 -0.022

1st undersize 53.75 47.55-0.042 -0.042-0.022 -0.022

2nd undersize 53.50 47.30-0.042 -0.042-0.022 -0.022

3rd undersize 53.25 47.05-0.042 -0.042

Dismantling and assembling pistons and conrods

Note: Vehicles can be fitted with two different types of conrods:

Conrods with fitted pin -item 8-: use conrod bolts without centring location.

Conrods without fitted pin: use conrod bolts with centring location(fitted bolts). 1 - 7 Nm Version fitted>06.96 Apply sealant AMV 188 001 02 when installing 2 - Oil spray jet For piston cooling Version fitted>06.96 With pressure relief valve (opens at 1.3 ... 1.6 bar)

3 - Pressure relief valve, 27 Nm Version fitted 07.96>(phased in) opens at: 1.3 ... 1.6 bar Do not apply locking fluid 4 - Oil spray jet For piston cooling Version fitted 07.96>(phased in) 5 - Bearing shell Note installation position Do not interchange used bearing shells (mark with waterproof pen) Ensure retaining lugs fit tightly in recesses Axial clearance Wear limit: 0.37 mm Check radial clearance with Plastigage: Wear limit: 0.08 mm Do not rotate crankshaft when checking radial clearance

6 - Cylinder block Checking cylinder bores =>Fig. 4, Page 13-64 Piston and cylinder dimensions =>Page 13-68 7 - Bearing shell Note installation position Do not interchange used bearing shells (mark with waterproof pen) Ensure retaining lugs fit tightly in recesses Axial clearance Wear limit: 0.37 mm Check radial clearance with Plastigage: Wear limit: 0.08 mm Do not rotate crankshaft when checking radial clearance

8 - Fitted pin See note =>Page 13-57 The fitted pin must seat securely in the conrod, not in the bearing cap 9 - Conrod See note =>Page 13-57 Only renew as a set Mark cylinder number -A- Installation position: Marking -B- faces towards pulley end 10 - Circlip 11 - Piston pin If difficult to move, heat piston to approx. 60 °C Remove and install with VW 222a

12 - Piston With combustion chamber Checking=>Fig. 3, Page 13-64 Mark installation position/cylinder number=> Fig.5, Page 13-65 Renew piston if there are cracks in piston skirt Arrow on piston crown points to pulley end Install using piston ring clamp Checking piston projection at TDC =>Page 13-66 Piston and cylinder dimensions =>Page 13-68

13 - Piston ring Offset gaps by 120 ° Remove and install with piston ring pliers "TOP" must face towards piston crown Checking ring gap =>Fig. 1, Page 13-63 Checking ring-to-groove clearance =>Fig. 2, Page 13-63 14 - Conrod bearing cap Mark cylinder number -A- Installation position: Marking -B- faces towards pulley end 15 - Conrod bolt, 30 Nm + 1/4 turn (90 °) further See note =>Page 13-57 Renew Oil threads and contact surface To measure radial clearance use old bolts

4A 1ZFig. 1Checking piston ring gap - Push ring squarely from above down to approx. 15 mm from bottom end of cylinder.

Piston ring New Wear limitDimensions in mm1st compression ring 0.20...0.40 1.02nd compression ring 0.20...0.40 1.0Oil scraper ring 0.25...0.50 1.0

Fig. 2Checking ring to groove clearance - Clean groove before checking clearance.

Piston ring New Wear limitDimensions in mm1st compression ring 0.06...0.09 0.252nd compression ring 0.05...0.08 0.25Oil scraper ring 0.03...0.06 0.15

4A Fig. 3Checking piston - Measure pistons approx. 10 mm from lower edge of skirt, at 90° to the piston pin axis. - Deviation from nominal dimension not more than 0.04 mm

4A 1ZFig. 4Checking cylinder bores Special tools and workshop equipment required

Internal dial gauge 50...100 mm - Take measurements at 3 positions in both lateral -A- and longitudinal -B- directions. - Deviation from nominal dimension not more than 0.10 mm

4A 1Z CUTFig.5Piston installation position and piston/cylinder allocation - Mark installation position and cylinder number on inside of pistons (not on piston crown) with electric scriber or felt-tip pen. - Pistons in cylinders 1 and 2: larger recess for inlet valve -arrows- goes towards flywheel end - Pistons in cylinders 3 and 4: larger recess for inlet valve -arrows- goes towards pulley end Note: On new pistons, allocation to cylinders is shown by a coloured marking on the piston crown.

Piston for cylinder 1 and 2: marked 1/2

Piston for cylinder 3 and 4: marked 3/4

Arrowon piston crown points to pulley end

Checking piston projection at TDC


Special tool VW 382/7

Special tool VW 385/17

4A 1Z CUT MICLEFThe piston projection at TDC must be measured when installing new pistons or a short engine. Install the correct cylinder head gasket for the piston projection - see table below.

Piston projection above top Gasket identificationsurface of cylinder block (No. of holes)0.91 mm ... 1.00 mm 11.01 mm ... 1.10 mm 21.11 mm ... 1.20 mm 3

4A 1ZCylinder head gasket identification

Part No. = arrow 1

Holes = arrow 2

Production code = arrow 3 (can be disregarded) Notes:

If different values are measured at individual cylinders when checking piston projection, select the gasket for the highest value.

Installation position: marking "OBEN / TOP" or Part No. goes towards cylinder head.

Piston and cylinder dimensions

Honing Piston dia. Cylinder boredimensionBasic dimen. mm 79.47 79.511st oversize mm 79.72 79.762nd oversize mm 79.97 80.01

Removing and installing cylinder head

Notes:

Cylinder heads which have cracks between the valve seats can continue to be used without reducing service life, provided there are only small cracks not wider than 0.5 mm.

When fitting a new cylinder head or cylinder head gasket, drain off all the old coolant and re-fill with new coolant.

The cylinder head on a diesel engine must not be reworked.

When installing an exchange cylinder head with fitted camshaft, the contact surfaces between tappets and cams must be oiled after installing the head.

The plastic protectors fitted to protect the open valves must only be removed immediately before fitting the cylinder head.

Before applying sealant, check updated information: => Parts catalogue

1 - Cylinder head Removing => Page 15-13 Check for distortion =>Fig. 1, Page 15-6 Installing => Page 15-23 After replacing, fill with fresh coolant 2 - 25 Nm 3 - Lifting eye 4 - Lower sealing cone 5 - Cylinder head cover gasket Renew if damaged or leaking Before fitting gasket apply AMV 174 004 01at sealing points =>Fig.3and Fig. 4, Page 15-7 Fit projections into drill holes on cylinder head

6 - Cylinder head cover Removing and installing => Page 15-8 7 - Upper sealing washer Renew if damaged 8 - Dished washer 9 - 10 Nm 10 - Cover cap 11 - Gasket Renew if damaged or leaking 12 - Fillercap 13 - Breather hose 14 - Hose clip After fitting hose clip on hose, engage in retaining tab on cylinder head cover

15 - Pressure regulating valve For crankcase breather 16 - Gasket Renew if damaged 17 - Cylinder head bolt Renew Note sequence when loosening => Page 15-22 Note sequence when tightening => Page 15-26 18 - Injector pipes Tighten to 25 Nm Remove with 3035 Always remove pipework complete Do not alter shape 19 - 10 Nm 20 - Coolant flange With coolant temperature sender

21 - O ring Renew 22 - Coolant flange 23 - 10 Nm 24 - Connector For needle lift sender -G80 25 - Return pipe To injection pump 26 - Cylinder head gasket Different thicknesses Note marking =>Fig. 2, Page 15-6 Renew => Removing cylinder head, from Page 15-13onwards Position: Marking "OBEN / TOP" or Part No. towards cylinder head After replacing, fill with fresh coolant

4A 1Z CUTFig. 1Checking cylinder head for distortion - Use knife-edge straightedge and feeler gauge to measure at several points. - Max. permissible distortion: 0.1 mm Note: Reworking Diesel cylinder heads is not permissible.

4A 1Z CUTFig.2Cylinder head gasket identification

Part No. = arrow 1

Holes = arrow 2

Production code = arrow 3 (can be disregarded) Notes:

Cylinder head gaskets of different thicknesses must be installed according to the amount of piston projection=>Page 13-66. When only the gasket is being replaced, install a new gasket with the same identification as the old one.

Installation position: marking "OBEN / TOP" or Part No. goes towards cylinder head.

4A 1Z CUTFig. 3Sealing sides of joint between bearing cap and cylinder head - Apply a small quantity of sealant "AMV 174 004 01" to sides of joints -arrows- on upper sealing surface of cylinder head.

Fig. 4Sealing sides of joint - Apply a small quantity of sealant "AMV 174 004 01" to sides of joints -arrows- on upper sealing surface of cylinder head.

Removing and installing cylinder head cover Removing

- Remove engine cover panel -arrows-.

- Slacken hose clamps -arrows- and disconnectcrankcase breather hoses from pressure control valve.

- Pull off caps -7-. - Loosen nuts -6- on cylinder head cover. - Take off dished washer -5- and upper sealing washer -4-. - Remove cylinder head cover -3-. - Remove gasket -2- and lower sealing cone -1-.

If damaged, fit new cylinder head cover gasket, upper sealing washer and sealing cone. - Apply a small quantity of sealant "AMV 174 004 01" to sides of joints -arrows- on upper sealing surface on cylinder head.

- Apply a small quantity of sealant "AMV 174 004 01" to sides of joints -arrows- on upper sealing surface on cylinder head. - Position cylinder head cover (with attached parts).Tightening torque

Component NmCylinder head cover to cylinder head 10

Installing

Installation is carried out in the reverse order, when doing this note the following:

Removing and installing intake manifold

Removing

- Remove turbocharger =>Page 21-29. - Slacken hose clamp -1-. - Unscrew bolts -arrows-.

- Unscrew nuts -1- and remove heat shield. - Unscrew bolts -arrows-. - Remove intake manifold.Installing Installation is performed in the reverse order. Tightening torques

Component NmIntake manifold to cylinder head 25Heat shield to exhaust manifold 25Mechanical exhaust gas recirculation valve to intake manifold 25

Removing cylinder head


Mandrel 2064

Setting bar 2065 A

Open ring spanner 3035

Counterhold tool 3036

Guide pin 3070

V.A.G 1306

All cable ties which are released or cut open when removing must be fitted in the same position when installing. - Obtain radio code on vehicles with coded radio. - With ignition switched off disconnect battery earth strap. Warning!Hot steam can escape when the cap on the expansion tank is opened. Cover the cap with a cloth, and open it carefully.

- Open cap on coolant expansion tank. - Remove engine cover panel -arrows-.

Work sequence

Engine in vehicle

Note:

- Remove air intake pipe -arrow- between lock carrier and air cleaner housing.

- Disconnect wires/unplug connectors as follows: 1 -Exhaust gas recirculation valve -N18 2 -Air mass meter -G70 4 -Charge pressure control solenoid valve -N75 5 -Intake manifold temperature sender -G72 - Disconnect vacuum hose from mechanical exhaust gas recirculation valve -3-. - Disconnect thin hose -6- from bottom of exhaust gas recirculation valve -N18. - Move wiring and hoses clear. - Detach air hose at air mass meter.

4A - Remove upper section of air cleaner housing together with air mass meter. - Unscrew charge pressure control solenoid valve -2- from air pipe -1-. Leave hoses connected. - Remove air pipe -1- between charge air cooler and intake manifold. - Remove air intake hose between charge air cooler and turbocharger.

- Unscrew bolts securing turbocharger to catalytic converter -arrows-. - Disconnect front exhaust pipe with catalytic converter from turbocharger.Note: Tie up flange of front exhaust pipe on right suspension turret with wire. It is then not necessary to remove front exhaust pipe.

- Remove noise insulation (two sections -arrows-). - Place a drip tray underneath.

- Detach oil return pipe from cylinder block -arrow-. - Draincooling system=> Page 19-4

- Disconnect fuel return hose -1- between injectors and injection pump. - Disconnect connectors-2 ...5-. - Disengage connector for engine speed sender from its retainer. - Disconnect coolant hose at rear of cylinder head -arrow-. - Remove injector pipes.Note: Always remove complete set of injector pipes together. Use special spanner for injector pipes 3035. - Unplug connectors from glow plugs.

- Disconnect coolant hoses -arrows- on left side of cylinder head. - Remove cylinder head cover =>Page 15-8.

900058 Type4A

Type description MY Engine ID1Z

Gearbox IDCUT

UserMICLEF

Workshop Manual- 7 -

- Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with manual gearbox).

- Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with automatic gearbox).

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Lock camshaft with setting bar 2065 A. - Remove toothed belt guard (upper) => Page 13-14.

- Unscrew 2 bolts -arrows- securing rear toothed belt guard on both sides of cylinder head.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Lock injection pump sprocket with pin 2064. - Mark direction of rotation of toothed belt with chalk or felt pen. - Loosen tensioning roller. - Remove idler wheel. - Take toothed belt off camshaft sprocket. - Remove toothed belt tensioning roller.Note: On no account use the setting bar to hold the camshaft when loosening and tightening the bolt securing the camshaft sprocket. Counter-hold with 3036.

- Loosen camshaft sprocket securing bolt 1/2 turn. Release camshaft sprocket from camshaft taper by tapping with a hammer (using a drift through rear toothed belt guard opening). - Remove camshaft sprocket.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Keep to specified sequence when loosening cylinder head bolts. - With a second mechanic, lift cylinder head up slightly and swivel out to the rear.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Installing cylinder head

Notes:

Always renew cylinder head bolts when assembling.

When performing repairs, renew seals, gaskets, self-locking nuts and bolts which have a specified tightening angle.

If repairing, carefully remove any remains of gasket material from the cylinder head and cylinder block. Make sure that no long scores or scratches are made on the surfaces.

Carefully remove any remaining emery and abrasive material.

No oil or coolant must be allowed to remain in the blind holes for the cylinder head bolts in the cylinder block.

Remove new cylinder head gasket from packaging just before installation.

Handle gasket extremely carefully. Damaging the silicone layer or the indented area will lead to leaks.

After working on the valve gear, turn the engine carefully at least 2 rotations to ensure that none of the valves make contact when the starter is operated. Installation is carried out in the reverse order, when doing this note the following:

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Turn crankshaft and camshaft to TDC of cylinder No. 1 before fitting cylinder head. It should be possible to insert setting bar 2065 A in camshaft ....

- ... and TDC marking should be in line with reference edge.Note: Illustration shows vehicle with manual gearbox.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Check identification on cylinder head gasket: - Part No. = arrow 1 - Holes = arrow 2 - Production code = arrow 3 (can be disregarded)Notes:

If the cylinder head gasket or the cylinder head has been replaced, select a new gasket according to the number of holes on the old gasket.

If parts of the crankshaft drive have been replaced, the new cylinder head gasket must be selected by measuring the piston projection at TDC => 13-66.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- To centre, screw guide pins 3070/9 from 3070 into the outer holes in the cylinder block. - Place cylinder head gasket in position. - Check that centring sleeve in cylinder block is fitted correctly. - Check installation position of cylinder head gasket: the word "oben" (top) or the Part No. should face towards the cylinder head. - Place cylinder head in position. - Screw in 8 cylinder head bolts and tighten by hand. - Unscrew guide pins with removal tool from 3070 through bolt holes in cylinder head and install remaining cylinder head bolts.

- Tighten cylinder head bolts in four stages in sequence shown as follows: - Tighten using torque wrench: - 1st stage: 40 Nm - 2nd stage: 60 Nm - TIghten with normal fixed wrench: - 3rd stage:1/4 turn (90°) further - 4th stage: 1/4 turn (90°) furtherNote: It is not necessary to tighten cylinder head bolts again later after repairs have been performed. - Install toothed belt (adjust valve timing) => Page 13-26. Note: Follow all instructions for removing and installing toothed belt =>Page 13-20. - Install cylinder head cover =>Page 15-9.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Aligning exhaust system free of stress => Page 26-10. - Fill cooling system with fresh coolant => Page 19-7. - After connecting battery, enter anti-theft code for radio => Radio operating instructions - Close windows fully using electric window switches. - Then operate all electric window switches again for at least one second in the "close" direction to activate the automatic one -touch function. - Set clock to correct time. Tightening torques

Component NmCatalytic converter to turbocharger 25Oil return pipe to cylinder block 30Injector pipes to injectors/injection pump 25Idler wheel to console 25Toothed belt sprocket to camshaft 45Hose clamps 2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking compression pressure


Special tool 3220

V.A.G 1763

V.A.G 1381/12

Requirements for test:

900058 Type4A


Gearbox IDCUT

UserMICLEF


Engine oil temperature not less than 30 °C

Battery voltage not less than 12 VTest sequence - Remove engine cover panel -arrows-. - Unplug connector for fuel cut-off valve on injection pump. - Disconnect connector to quantity adjuster on injection pump. - Remove all glow plugs using socket spanner 3220.

- Screw in adapter V.A.G 1381/12 in place of the glow plugs. - Check compressions with compression tester V.A.G 1381/V.A.G 1763.Note: Using the compression tester => Operating instructions - Operate starter until tester shows no further pressure increase. Compression pressure:

New Wear limit Permissible difference between cylinders

bar barbar

25 ... 31 19 max. 5 - Install glow plugs with jointed spanner 3220 Tightening torque: 15 Nm. - Interrogate and erase fault memory:

900058 Type4A


Gearbox IDCUT

UserMICLEF


=> Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Interrogating and erasing fault memory=> Note: Faults will have been stored in the memory because connectors have been unplugged from the injection pump. Interrogate and erase fault memory after checking compression. Tightening torque

Component NmGlow plugs in cylinder head 15

900058 Type4A


Gearbox IDCUT

UserMICLEF


Servicing valve gear

Notes:

Cylinder heads which have cracks between the valve seats can continue to be used without reducing service life, provided there are only small cracks not more than 0.5 mm wide.

After installing the camshaft, wait for about 30 minutes before starting the engine. The hydraulic tappets must be allowed to settle, otherwise the valves will contact the pistons.

After working on the valve gear, turn the engine carefully at least 2 rotations to ensure that none of the valves make contact when the starter is operated.

Renew all gaskets and seals.

Before applying sealant, check updated information: => Parts catalogue

900058 Type4A


Gearbox IDCUT

UserMICLEF


1 - Cylinder head See note => Page 15-32 Checking valve guides =>Page 15-54 Reworking valve seats => Page 15-51 2 - Oil seal To remove and install, remove bearing cap and camshaft sprocket Removing and installing toothed belt =>Page 13-20and13-26 3 - Camshaft sprocket Take off toothed belt before removing and installing =>Page 13-20or 13-26 Drive off camshaft taper using hammer and drift through toothed belt guard openings

900058 Type4A


Gearbox IDCUT

UserMICLEF


4 - 45 Nm Counter-hold with 3036 to loosen and tighten 5 - 20 Nm 6 - Bearing cap Installation position =>Fig. 1, Page 15-38 Installation sequence => Page 15-40, removing and installing camshaft Before installing first bearing cap, apply a thin coat of sealant "D 454 300 A2" to contact surfaces ApplyAMV 174 004 01at sealing points=>Fig.3and Fig.4, Page 15-7

900058 Type4A


Gearbox IDCUT

UserMICLEF


7 - Camshaft Checking axial clearance => 15-39 Removing and installing => Page 15-40 Check radial clearance with Plastigage Wear limit: 0.11 mm Run-out: max. 0.01 mm 8 - Hydraulic bucket tappet Checking => Page 15-46 Removing and installing => Page 15-48 Do not interchange Store with cam contact surface downwards Before installing check camshaft axial clearance => Page 15-39 Oil contact surface

900058 Type4A


Gearbox IDCUT

UserMICLEF


9 - Valve cotters 10 - Upper valve spring plate 11 - Outer valve spring Removing and installing: with cylinder head removed: use 2037 with head installed: => Page 15-48 12 - Inner valve spring Removing and installing: with cylinder head removed: use 2037 with head installed: => Page 15-48 13 - Valve stem seal Renewing=> Page 15-48 14 - Valve guide Checking => Page 15-54 Renew cylinder head if wear limit is exceeded

900058 Type4A


Gearbox IDCUT

UserMICLEF


15 - Lower valve spring plate Use puller 3047 A to remove and install 16 - Valve Do not rework; only lapping-in is permitted Valve dimensions =>Fig. 2, Page 15-38

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 7 -Fig. 1Fitting position of camshaft bearing caps

Note offset. Before installing camshaft fit bearing caps and determine fitting position.

Fig. 2Valve dimensions Note: Valves must not be reworked. Only lapping-in is permitted.

Dimension Inlet valve Exhaust valveDia. -a- mm 35.95 31.45Dia. -b- mm 6.963 6.943c mm 96.85 96.85α <° 45 45

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking camshaft axial clearance


Special tool VW 387

Dial gauge

- Perform measurement with bucket tappets removed and front and rear bearing caps fitted. - Wear limit: 0.15 mm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing camshaft


Mandrel 2064

Setting bar 2065 A

Removing

Cylinder head installed - Remove toothed belt guard (upper) => Page 13-14.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove cylinder head cover =>Page 15-8. - Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with manual gearbox).

- Turn crankshaft to TDC No. 1 cylinder -arrow- (vehicles with automatic gearbox).

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Lock camshaft with setting bar 2065 A.

- Lock injection pump sprocket with pin 2064. - Mark direction of rotation of toothed belt with chalk or felt pen.Note: If the belt runs in the wrong direction when it is refitted, it can break. - Loosen tensioning roller. - Remove idler wheel. - Take toothed belt off camshaft sprocket. Note: On no account use the setting bar to hold the camshaft when loosening and tightening the bolt securing the camshaft sprocket. Counter-hold with 3036.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Loosen camshaft sprocket securing bolt 1/2 turn. Release camshaft sprocket from camshaft taper by tapping with a hammer (using a drift through rear toothed belt guard opening). - Remove camshaft sprocket. - First remove bearing caps 1, 3 and 5. Loosen bearing caps 2 and 4 alternately and diagonally.Installing Installation is carried out in the reverse order, when doing this note the following: Notes:

Renew camshaft oil seal.

When installing the camshaft No. 1 cylinder cams must point upwards.

When installing the bearing cap note offset. Before installing

camshaft, fit bearing caps and determine correct position. - Oil camshaft running surfaces. - Tighten bearing caps 2 and 4 alternately and diagonally to 20 Nm. - Install bearing caps 5, 1 and 3 and also tighten to 20 Nm. - Install toothed belt (adjust valve timing) => Page 13-26.Notes:

Follow all instructions for removing and installing toothed belt =>Page 13-20onwards.


After working on the valve gear, turn the engine carefully at least 2 rotations to ensure that none of the valves make contact when the starter is operated. - Install cylinder head cover =>Page 15-9. - Check injection pump commencement of delivery (dynamic)

900058 Type4A


Gearbox IDCUT

UserMICLEF


=> Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 23; Servicing diesel direct injection system;=> => Dynamically checking and adjusting commencement of injection Tightening torque

Component NmBearing caps to cylinder head 20

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking hydraulic bucket tappets


Feeler gauge

Wood or plastic wedge Notes:

Hydraulic tappets cannot be adjusted or repaired.

Irregular valve noises when starting engine are normal. - Start engine and run until coolant temperature reaches approx. 80 °C. - Increase engine speed to about 2500 rpm for 2 minutes (perform road test if necessary). Note: If the irregular valve noises stop but recur repeatedly during short journeys, a new oil retention valve must be fitted. The oil retention valve is located in the oil filter bracket. If the hydraulic tappets are still noisy, locate defective tappets as follows: - Remove cylinder head cover =>Page 15-8. - Rotate crankshaft until cams of cylinder to be checked are pointing upwards. - Determine play between cam and bucket tappet.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Press tappet down with a wooden or plastic wedge. If an 0.20 mm feeler gauge can be inserted between camshaft and tappet, renew tappet. - Renewing tappets, => Removing camshaft, Page 15-40.Notes:



900058 Type4A


Gearbox IDCUT

UserMICLEF


Renewing valve stem seals


Valve lever VW 541/1A with thrust piece VW 541/5

Fitting tool 2036

Puller 3047 A

Fitting tool 3129

Removing

Cylinder head installed - Remove camshaft => Page 15-40.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove the bucket tappets and put them down with the contact surface downwards. When doing this ensure that the tappets are not interchanged. - Set piston of respective cylinder to top dead centre (TDC). - Position fitting tool 2036 with shaft parallel to sealing edge of cylinder head cover. Tighten bolts to secure fitting tool. - Adjust shaft of fitting tool so that it is level with the studs for the bearing caps.

- Remove valve springs with lever VW 541/1A.Note: The valves are supported by the piston crown. - Pull off valve stem seals with 3047 A. Installing

900058 Type4A


Gearbox IDCUT

UserMICLEF


- To prevent damage to the new valve stem seals -B-, place plastic sleeve -A- on valve stem. - Lightly oil sealing lip of valve stem seal. - Insert valve stem seal in the tool 3129 and push it down carefully onto the valve guide. - Remove plastic sleeve. - Install camshaft => Page 15-44.Notes:



900058 Type4A


Gearbox IDCUT

UserMICLEF


Reworking valve seats

Note: If a good seating pattern cannot be obtained by grinding the valve seats (lapping), they must be refaced (reworked): Special tools and workshop equipment required

Depth gauge

Valve seat refacing tool Notes:

When repairing engines with leaking valves, it is not sufficient to reface the valve seats and renew the valves. The valve guides must also be checked for wear. This is particularly important on high mileage engines =>Page 15-54.

The valve seats should only be reworked just enough to produce a perfect seating pattern.

Calculate the maximum permissible reworking dimension before reworking.

If the maximum permissible reworking dimension is 0 mm or less than 0 mm, measure again with a new valve. If it is still 0 mm or less than 0 mm, the cylinder head must be replaced. Calculating max. permissible reworking dimension - Insert valve and press it firmly against valve seat. Note: If the valve is to be renewed as part of a repair, use a new valve for the calculation.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Measure distance -a- between end of valve stem and upper edge of cylinder head. - Calculate max. permissible reworking dimension from measured distance -a- and minimum dimension.Minimum dimension:Inlet valve 35.8 mmExhaust valve 36.1 mm Measured distance minus minimum dimension= max. permissible reworking dimension. Example:

Measured distance 36.5 mm- Minimum dimension 35.8 mm= max. perm. rework dimension 0.7 mm

Reworking inlet valve seat

a = 35.7 mm шb = 1.6 mm45 ° = Valve seat angle Note: The 30 ° lower valve seat chamfer is required for gas flow characteristics in the inlet port.

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 3 -Reworking exhaust valve seat

a = 31.4 mm шb = 2.7 mm45 ° = Valve seat angle

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking valve guides


Special tool VW 387

Dial gauge

- Insert valve into valve guide until end of valve stem is flush with end of guide. Due to the slight difference in stem diameters, ensure that only an inlet valve is used in the inlet guide and an exhaust valve in the exhaust guide.Wear limit

Amount of sideways play: not more than 1.3 mm

Notes:

If the wear limit is exceeded, repeat the measurement with new valves. If the wear limit is again exceeded, renew the cylinder head.

If the valve is to be renewed as part of a repair, use a new valve for the calculation.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing parts of the lubrication system

Notes:

If large quantities of metal shavings or particles are found in the engine oil when repairing the engine, the oil passages must be cleaned carefully, and the oil cooler renewed in order to prevent further damage occurring later.

The oil level must not be above the max. mark - danger of damage to catalytic converter.

Before applying sealant, check updated information: => Parts catalogue Viscosity grades and oil specifications: => Maintenance Oil system capacity: => Binder "Emissions test"

900058 Type4A


Gearbox IDCUT

UserMICLEF


Part I

1 - Oil drain plug, 30 Nm 2 - Gasket Renew 3 - 18 Nm Tighten in stages and in diagonal sequence 4 - Gasket Renew Install dry Apply a small amount of sealant "AMV 174 004 01" only to sealing points between sealing flange and cylinder block (front and rear) 5 - 10 Nm 6 - Suction pipe Clean strainer if soiled

900058 Type4A


Gearbox IDCUT

UserMICLEF


7 - O ring Renew 8 - Pressure relief valve, 27 Nm opens at: 1.3 ... 1.6 bar Do not apply locking fluid Version fitted 07.96 >(phased in) 9 - Oil spray jet For piston cooling Version fitted 07.96 >(phased in) Version fitted>06.96 =>-Item 2-, Page 13-57 10 - Gears Checking backlash =>Fig. 1, Page 17-8 Checking axial clearance =>Fig. 2, Page 17-8

900058 Type4A


Gearbox IDCUT

UserMICLEF


11 - Oil pump cover with pressure relief valve Opening pressure: 5.7...6.7 bar 12 - 10 Nm 13 - 25 Nm 14 - Sump Removing and installing => Page 17-9 Clean sealing surface before installing Before installing sump, apply a small amount of sealant "AMV 174 004 01" to sealing points between sealing flange and cylinder block

900058 Type4A


Gearbox IDCUT

UserMICLEF


15 - Engine/gearbox support Remove support in order to remove sump => Page 17-9 When installing engine/gearbox support with engine removed from vehicle, ensure that support is positioned flush with intermediate plate at flywheel end (i.e. engine/ gearbox support should protrude 0.8 mm from cylinder block). 16 - 45 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Part II

1 - Oil filter Observe change intervals=> Maintenance manual Loosen with strap wrench Observe installation instructions on oil filter 2 - 25 Nm 3 - Oil cooler See note => Page 17-1 Coolant hose connection diagram =>Page 19-2 4 - 25 Nm 5 - Oil filter bracket 6 - Gasket Renew

900058 Type4A


Gearbox IDCUT

UserMICLEF


7 - 0.9 bar oil pressure switch -F1 - 25 Nm Grey Checking => Page 17-15 8 - Seal If seal is leaking, cut open and renew. 9 - Oil temperature sender -G8 -10 Nm 10 - Seal If seal is leaking, cut open and renew. 11 - O ring Renew Engage in projections on oil cooler

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 3 -Fig. 1Checking oil pump backlash

New: 0.05 mm Wear limit: 0.20 mm

Fig. 2Checking oil pump axial clearance Wear limit: 0.15 mm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing sump


Workshop crane V.A.G 1202 A

Drip tray

Sealant AMV174 004 01

Removing

- Remove noise insulation (two sections, -arrows-). - Drain engine oil.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Support subframe with workshop crane V.A.G 1202 A.

- Unscrew retaining clamps -arrows- for starter cable from subframe. - Unscrew front subframe bolts -1- and -2-.Note: The subframe should be detached and lowered only at the front, otherwise it will be necessary to check wheel alignment.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Lower subframe slowly using workshop crane V.A.G 1202 A.

- Unscrew bolts -1 ... 8- from engine/gearbox support. - Take off engine/gearbox support. - Unbolt and remove sump: if necessary loosen it by striking lightly with a rubber hammer.Installing Installation is carried out in the reverse order, when doing this note the following:

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 4 -Notes:

Renew seals and gaskets.

When installing the engine and gearbox support -3- with the

engine removed from the vehicle, make sure that the support is positioned flush with the intermediate plate -1- at the flywheel end. In other words, the engine/gearbox support should protrude by 0.8 mm (distance a) from cylinder block -2-. - Clean sealing surfaces before installing sump. - Lightly coat the sealing points for the sump between sealing flange and cylinder block (at front and rear) using AMV 174 004 01. - Tighten bolts securing sump to cylinder block in diagonal sequence and in two stages, tightening to 18 Nm at second stage. - Installsubframe => Running gear, Front-wheel drive and four-wheel drive; => Repair group 40; Servicing front suspension;=> => Removing and installing subframe - Fill up with engine oil and check oil level. Tightening torques

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 5 -Attachments of engine/gearbox support

Item No. Bolt Nm1 M10 x 28 45

2, 4, 5 1) M10 x 45 453, 7 M10 x 95 456 M10 x 50 458 M10 x 65 45

1)Vehicles up to approx. 07.96: M8 bolt; tightening torque 25 Nm

Component NmSump to cylinder block1) 18Oil drain plug 30 1)Special bolts; use only correct type (same as original equipment) => Parts catalogue

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing oil pump

Removing - Remove sump => Page 17-9.

- Loosen bolts -arrows-. - Take off oil pump.Installing Installation is carried out in the reverse order, when doing this note the following: - Installing sump => Page 17-12. Tightening torque

Component NmOil pump to cylinder block 25

900058 Type4A


Gearbox IDCUT

UserMICLEF


Testing oil pressure and oil pressure switch


V.A.G 1342

V.A.G 1527 B

V.A.G 1594 A


Oil level ok.

Oil pressure warning lamp -K3 must come on when ignition is

900058 Type4A


Gearbox IDCUT

UserMICLEF


switched on.

In vehicles with auto-check system the "OK" display must appear (call up symbol).

Engine oil temperature approx. 80 °C Testing warning lamp The oil pressure warning lamp lights up when the ignition is switched on ("terminal 15 on") with the engine not running (this does not apply to vehicles with auto-check system). Testing oil pressure switch - Disconnect wire from oil pressure switch.

- Unscrew oil pressure switch and screw in oil pressure tester V. A.G 1342. - Screw oil pressure switch -2- intoV.A.G 1342. - Connect brown wire -1- of tester to earth (-). - Connect voltage tester V.A.G 1527 B to oil pressure switch and positive side of battery (+) using test leads from V.A.G 1594 A. - Test lamp should not light up - If test lamp lights up, renew oil pressure switch. - Start engineNote: The switching point of the oil pressure switch can be reached when the engine is cranked on the starter motor, so watch the tester and the test lamp while starting the engine. - Test lamp should light up at 0.75...1.05 bar. If test lamp does not light up, renew oil pressure switch. Testing oil pressure - Disconnect wire from oil pressure switch.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unscrew oil pressure switch and screw in oil pressure tester V. A.G 1342. - Screw oil pressure switch -2- intoV.A.G 1342. - Start engine (engine oil temperature at least 80°C). - Oil pressure at 2000 rpm: at least 2.0 bar - Oil pressure at higher engine speeds: max. 7.0 barIf the specifications are not obtained: - Pressure relief valve or oil pump defective; renew oil pump => Page 17-14.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Engine oil A high-quality multigrade oil is put in at the factory: this can be used all year round, except in extremely cold climates. Viscosity grades and oil specifications Viscosity grades and oil specifications: => Maintenance

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking oil level


Engine oil temperature at least 60 °C

Vehicle must be level (horizontal)

After switching off the engine, wait a few minutes to allow the oil to flow back into the sump. Test sequence - Pull out the dipstick, wipe off with a clean cloth and insert it again as far as it will go. - Pull out the dipstick again and read off the oil level.

Markings on oil dipstick: a -Do not top up oil. b -Oil can be topped up. The oil level may rise as far as area -a- after topping up. c -Oil must be topped up. It is sufficient if the oil level is somewhere in area -b- (grooved area on dipstick) after topping up. Note: The oil level must not be above marking -a- on the dipstick.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing parts of cooling system Warning!Hot steam can escape when the cap on the expansion tank is opened. Cover the cap with a cloth, and open it carefully.

Notes:

When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work.

Secure all hose connections with the correct hose clips (same as original equipment) => Parts catalogue

V.A.G 1921 pliers are recommended when installing spring -type clips.

Renew all gaskets and seals.

The arrow markings on the coolant pipes and on the ends of the hoses must be aligned with each other.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Parts of cooling system

Diagram of coolant hose connections 1 - Radiator Removing and installing => Page 19-18 After replacing, fill system with fresh coolant 2 - Return pipe To expansion tank 3 - Expansion tank 4 - Fillercap With pressure relief valve Testing pressure relief valve =>Page 19-23 5 - Oil cooler Removing and installing =>Page 17-6, item 3

900058 Type4A


Gearbox IDCUT

UserMICLEF


6 - Return pipe From heat exchanger (for heater) 7 - Heating system heat exchanger After replacing, fill system with fresh coolant 8 - Supply pipe To heat exchanger 9 - Coolant pump/coolant thermostat Removing and installing coolant pump =>Page 19-11 Check for ease of movement Removing and installing coolant thermostat =>Page 19-16 Checking =>Page 19-17

900058 Type4A


Gearbox IDCUT

UserMICLEF


Draining and filling cooling system


Drip tray V.A.G 1306

Special tool T10007 (for coolant additive G 012 A8 D)

Draining Note: Catch drained-off coolant in a clean container for re-use or disposal. Warning!Hot steam can escape when the cap on the expansion tank is opened. Cover the cap with a cloth, and open it carefully.

- Open cap on coolant expansion tank.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove front section of noise insulation -lower arrows-.

- Place drip tray V.A.G 1306 below engine. - Turn drain screw -arrowon radiator anti-clockwise, if necessary fit drain hose to connection.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- To drain off remaining coolant, disconnect coolant hoses -arrows-.Filling Notes:

The cooling system is filled all year round with a mixture of water and coolant additive (combined anti-freeze and corrosion protection agent).

Coolant additive G 011 A8 C (green) is used in vehicles up to 06.96.

Only coolant additive G 012 A8 D (red) is used in vehicles from 07.96 onwards. CautionThe two different coolant additives G

If the fluid in the expansion tank is brown, this means G 012 A8 D has been mixed with another type of coolant. In this case, flush out the cooling system and put in fresh coolant. To flush the system, fill it with clean water and run the engine for about 2 minutes. This should remove very nearly all of the old coolant.

G 011 A8 C and G 012 A8 D (and coolant additives marked "meeting specification TL VW 774 C" or "meeting specification TL VW 774 D") prevent frost and corrosion damage, stop scaling and at the same time raise the boiling point of the coolant. For these reasons the cooling system must be filled all year round with the correct anti-freeze and anti-corrosion additive.

Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.

Protection against frost must be assured down to about -25 °C (in countries with arctic climate downto about -35 °C).

The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The anti-freeze ratio must be at least 40 %.

If greater frost protection is required in very cold climates, the amount of G 012 A8 D can be increased, but only up to 60 % (this gives frost protection to about -40 °C), as otherwise frost

900058 Type4A


Gearbox IDCUT

UserMICLEF


protection is reduced again and cooling effectiveness is also reduced.

Only use clean tap water for mixing coolant.

If radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.

Special tool T10007 must be used for testing the anti-freeze concentration if the cooling system contains coolant additive G012 A8 D. Recommended mixture ratios:

Anti-freeze Anti-freeze G 012A8 D 1) Water 1)protection down to concentration

-25 °C 40 % 2.60 ltr. 3.90 ltr.-35 °C 50 % 3.25 ltr. 3.35 ltr.

1)Cooling system capacity: 6.5 litres (may vary according to equipment fitted on vehicle) - Close drain screw on radiator.

- Fill up with coolant to max. mark on expansion tank. - Fit expansion tank cap. - Start engine. - Then run engine at idling speed until bottom hose on radiator becomes hot. - Check coolant level and top-up if necessary. When the engine is at normal operating temperature, the coolant level must be on the max. mark, when the engine is cold, between the min. and max. marks. Warning!Hot steam can escape when the cap on the expansion tank is opened. Cover the cap with a cloth, and open it carefully.

- Stop engine.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing coolant pump

Removing - Draincooling system=> Page 19-4. - Slacken bolts 2 ... 6. - Slacken V-belt by turning tensioning nut -1-. - Remove V-belt.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unbolt vane pump for power steering complete with rear bracket -arrows-. Do not disconnect hydraulic connections. - Secure vane pump to body with wire to reduce load on connections.

- Disconnect coolant hoses from coolant pump and thermostat housing -arrows-.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove engine cover panel -arrows-.

- Detach bracket for engine cover panel below injection pump -2-. - Unbolt bracket for vane pump-1 ... 3-.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unbolt coolant pump housing from toothed belt guard -4-. - Unbolt support for injection pump console -1 ... 3-. - Remove coolant pump.

- Unbolt bearing housing -1- from pump housing -4-.Installing Installation is carried out in the reverse order, when doing this note the following: - Clean sealing surfaces on both sections of housing. - Renew gasket and O-ring. - Insert hammer-head bolt in drilling in coolant pump. - Install V-belt =>Page 13-9. - Fill up with coolant=> Page 19-7.

Tightening torques

Component NmBearing housing to pump housing 10Pump housing to toothed belt guard 10Vane pump bracket to cylinder block 25Bracket for engine cover panel 25Hose clamps 2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing, checking coolant thermostat

Removing - Drain cooling system=> Page 19-4 - Slacken bolts 2 ... 6. - Slacken V-belt by turning tensioning nut -1-.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove V-belt. - Unbolt vane pump for power steering complete with rear bracket -arrows-. Do not disconnect hydraulic connections. - Secure vane pump to body with wire to reduce load on connections.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unscrew bolts -4- and remove connection -3-, O-ring -2- and coolant thermostat -1-.Installing - Clean and smooth down sealing surface for O-ring as required. - Insert coolant thermostat. - Install V-belt =>Page 13-9. - Fill up with coolant=> Page 19-7. Tightening torques

Component NmConnection to pump housing 10Hose clamps 2 Testing coolant thermostat - Heat thermostat in water bath.

Starts to open Fully open Opening travelapprox. 87 °C approx. 102 °C1) min. 8 mm

1)cannot be tested

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing radiator

Removing - Remove front bumper. => General body repairs; Repair group 63; Front bumper=> - Drain coolant from drain plug on radiator=> Page 19-4

- Disconnect both coolant hoses at bottom of radiator -arrows-. - Unplug connector -1- from radiator fan thermoswitch -F54. - Disconnect coolant hose at top left of radiator.Vehicles with automatic gearbox - Removing ATF pipes/hoses from radiator: => Automatic gearbox 01N; Repair group 37;=> => Dismantling and assembling gearbox; Removing and installing ATF pipes Vehicles with air conditioner: Warning!The air conditioner refrigerant circuit must not be opened.

Note: To prevent damage to the condenser and refrigerant pipes/hoses, ensure that the pipes and hoses are not stretched, kinked or bent. - Remove securing bolts for condenser. - Pull condenser out of its bracket, pivot towards the side and

900058 Type4A


Gearbox IDCUT

UserMICLEF


secure with wire. All models

- Remove securing screw -arrow A- and pull out headlight trim in direction indicated by arrow.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove screw securing bracket -2- for headlight trim on housing. - Detach air cowls from radiator -1- and -3- (left and right).

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unscrew nuts -2- on bonded rubber mountings. - Pull radiator forwards out of bracket for bonded rubber mounting at the bottom ... - ... and pull downwards out of top bracket -arrow- (if necessary, unscrew bolt -1- on radiator support).Installing Installation is carried out in the reverse order, when doing this note the following: - Fill up with coolant=> Page 19-7. Tightening torque

Component NmRadiator to front end M6 10

M8 20Condenser to radiator 10Hose clamps 2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking cooling system for leaks


V.A.G 1274 with V.A.G 1274/1 Test requirement:

Engine at operating temperature. Test sequence

900058 Type4A


Gearbox IDCUT

UserMICLEF


Warning!Hot steam can escape when opening cap on expansion tank: Cover cap with a cloth and open carefully.

- Open cap on coolant expansion tank. - Attach tester V.A.G 1274 with adapter V.A.G 1274/1 to expansion tank. - Using hand pump on tester, build up a pressure of approx. 1.0 bar. - If pressure is not maintained, trace leak and rectify fault.Testing pressure relief valve in filler cap.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Fit tester V.A.G 1274 with adapter V.A.G 1274/1 onto filler cap. - Operate hand pump. - Pressure relief valve must open at 1.2 ... 1.5 bar.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Fuel supply system Safety precautions when working on the fuel supply system

When removing and installing the fuel gauge sender from a full or partly full fuel tank, note the following points:

The fuel tank must not be more than2/3full.

If necessary, drain the tank according to instructions: => Page 20-6.

Before commencing work, switch on exhaust extraction system and place an extraction hose close to the sender opening in the fuel tank to extract escapingfumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m3/h can be used.

Avoid skin contact with fuel. Wear fuel-resistant gloves. Drain the fuel tank before removal from the vehicle in order to reduce weight.


900058 Type4A


Gearbox IDCUT

UserMICLEF


Safety precautions when working on the fuel supply system

When removing and installing the fuel gauge sender from a full or partly full fuel tank, note the following points:

The fuel tank must not be more than2/3full.


Before commencing work, switch on exhaust extraction system and place an extraction hose close to the sender opening in the fuel tank to extract escapingfumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m3/h can be used.

Avoid skin contact with fuel. Wear fuel-resistant gloves. Drain the fuel tank before removal from the vehicle in order to reduce weight.


900058 Type4A


Gearbox IDCUT

UserMICLEF


Rules for cleanliness

When working on the fuel supply/injection system, pay careful attention to the following "basic rules":

Thoroughly clean all unions and the adjacent areas before disconnecting.

Place parts that have been removed on a clean surface and cover them over. Do not use fluffy cloths!

Carefully cover over or seal opened components if the repair cannot be completed immediately.

Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored loose (e.g. in tool boxes etc.).

When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely necessary.

Also ensure that no Diesel fuel runs onto the coolant hoses. If necessary hoses must be cleaned immediately. Affected hoses must be replaced.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Overview of components: fuel tank with attachments

Notes:

All hose connections must be secured with hose clips (same as original parts). => Parts catalogue

Always renew gaskets and seals when performing repairs. 1 - Securing strap For fuel tank 2 - Fuel tank Removing and installing => Page 20-7 3 - Vent pipe

900058 Type4A


Gearbox IDCUT

UserMICLEF


4 - Hose for filler pipe 5 - Filler pipe insert With non-return flap 6 - Filler pipe 7 - Overflow hose 8 - Oval head screw 9 - Clamp 10 - Union nut, 60 Nm Remove and install with spanner 3217 11 - Fuel gauge sender -G Testing => Page 20-10 Removing and installing => Page 20-13 Internal dia. of supply pipe: 8 mm Internal dia. of return pipe: 6 mm

900058 Type4A


Gearbox IDCUT

UserMICLEF


12 - Seal 13 - Clamping washer 14 - Heat shield For fuel tank Ensure proper seating on rubber plugs Engage on retaining pins on fuel tank and secure with clamping washer 15 - Collar nut - 20 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Draining fuel tank

Observe safety precautions=> Page 20-1. Observe rules for cleanliness => Page 20-2. Special tools and workshop equipment required

Fuel extractor V.A.G 1433 A

Work sequence - Remove filler cap from fuel tank filler neck. - Drain tank as far as possible via fuel filler neck.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing fuel tank

Observe safety precautions=> Page 20-1. Observe rules for cleanliness => Page 20-2.


Engine/gearbox jack V.A.G 1383 A Removing - Drain fuel tank if necessary using fuel extractor V.A.G 1433 A => Page 20-6. Note: The fuel tank must be empty when it is removed from the vehicle in order to reduce weight.

- Detach cover for fuel gauge sender unit under floor trim in luggage compartment. - Disconnect return pipe -2- and supply pipe -3- from fuel gauge sender. - Release and unplug connector -1-.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove screw -arrowon filler neck. - Clean area around tank filler neck. - Remove rear right wheel housing liner. - Detach overflow hose from bracket. - Disconnect overflow hose from filler neck.

- Release hose clamp on lower connecting hose between fuel tank and fuel filler pipe -arrow-.Note: The lower connecting hose must remain on the hose connection on the tank. - Pull off filler pipe and remove from vehicle. - Position engine/gearbox jack V.A.G 1383 A below vehicle to support tank. - Mark the correct positions of the securing straps. - Loosen nuts on securing straps. - Lower fuel tank (2nd mechanic required). Installing Installation is carried out in the reverse order, when doing this note the following: Notes:

900058 Type4A


Gearbox IDCUT

UserMICLEF


Secure all hose connections with the correct hose clips (same

as original equipment) => Parts catalogue

Always renew sealing rings and gaskets when assembling. - Transfer heat shield from old tank to new tank. - Position fuel tank and securing straps on underside of vehicle using engine/gearbox jack V.A.G 1383 A. Tightening torque

Component NmSecuring straps for fuel tank to body 20

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking fuel gauge sender -G


Hand-held multimeter V.A.G 1526 A

Adapter set V.A.G 1594 A

Note: Testing signal from fuel gauge sender: => Electrical system; Repair group 90; Servicing dash panel insert; Identification of contacts on multi-pin connectors in dash panel insert=>

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 2 -Work sequence

- Detach cover for fuel gauge sender under floor trim in luggage compartment. - Release connector -1- and unplug.

- Measure resistance at contacts -2- and -3- on flange:

Sender unit Tank full Tank emptyFuel gauge sender -G

58 Ω 550 ΩAccording to the amount of fuel in the tank, the resistance should be somewhere between the specified values for "tank full" and "tank empty". - If the resistance is 0 Ωor ∞ Ω, this means there is a short circuit or an open circuit in the wiring in the tank. Notes:

In order to test the maximum and minimum values for "tank full" and "tank empty", remove the fuel gauge sender -G => Page 20-13and move the float all the way to its top or bottom position.

When the sender is removed from the tank the float travel is greater, so the resistance readings will differ slightly from those given in the table.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing fuel gauge sender


Union nut spanner 3217

Hose clamp pliers V.A.G 1275

Observe safety precautions=> Page 20-1. Observe rules for cleanliness => Page 20-2. Removing

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Detach cover for fuel gauge sender under floor trim in luggage compartment. - Disconnect fuel return pipe -2- and supply pipe -3- from fuel gauge sender. - Release and unplug connector -1-.

- Remove union nut with spanner 3217. - Take out fuel gauge sender and seal from opening in fuel tank.Installing Installation is carried out in the reverse order, when doing this note the following: Note: Secure all hose connections with the correct hose clips (same as original parts) => Parts catalogue - Fit new seal for fuel gauge sender (dry) in opening in fuel tank.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Insert fuel gauge sender in fuel tank; note correct installation position: - Notch -2- on flange must be aligned with marking on fuel tank -1-.

- Tighten union nut with spanner 3217 (60 Nm).Note: Hold guide for hose in position when tightening union nut. - Connect pipes and plug in the connector. Note: Ensure that fuel pipes are securely seated.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Servicing fuel filter

Notes:

All hose connections must be secured with hose clips (same as original parts). => Parts List

Always renew seals and gaskets.

Draining water from fuel filter; renewing => Maintenance booklet 1 - Water drain plug Loosen and allow approx. 100 cm3 fluid to drain Loosen vent screw in order to drain water 2 - Seal Renew if damaged

900058 Type4A


Gearbox IDCUT

UserMICLEF


3 - Fuel filter Loosen with strap wrench Lightly lubricate seals with diesel before installing Fill with clean fuel before installing Tighten by hand 4 - Seal Renew if damaged 5 - Supply pipe From fuel tank 6 - Supply pipe To injection pump 7 - O-Ring Renew 8 - Return pipe From injection pump

900058 Type4A


Gearbox IDCUT

UserMICLEF


9 - Control valve Installation position: arrow points towards fuel tank 10 - Retainer plate 11 - 5 Nm 12 - Return pipe To fuel tank 13 - Non-return valve Installation position: arrow points towards fuel tank 14 - Vent screw - 10 Nm Loosen in order to drain water 15 - Seal 16 - Fuel filter flange

900058 Type4A


Gearbox IDCUT

UserMICLEF


17 - Insert 18 - Heat shield 19 - 10 Nm 20 - Bracket 21 - 10 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Bleeding fuel system


Hose clamps 3094

Adapter V.A.G 1318/10

Hand-operated vacuum pump V.A.G 1390

Bleeder container V.A.G 1390/1

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 2 -Work sequence

- Screw adapter V.A.G 1318/10 into return connection on injection pump. - Connect hand vacuum pump V.A.G 1390 and bleeder container V.A.G 1390/1 to adapter. Note:

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 3 -At temperatures below + 15 °C the control valve for fuel pre

-heating opens the passage from the fuel return hose to the filter. If this is the case, clamp off the return hoses on both sides of the control valve using hose clamps 3094. - Operate hand vacuum pump until fuel flows free of bubbles. Important:Empty the bleeder container it becomes completely full. No fuel must be allowed to enter the hand vacuum pump.

- Reconnect return pipe to injection pump (25 Nm). Note: Replace seals. - Remove hose clamps 3094 from return hose. - Start the engine and check fuel system for leaks (visual check).

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking fuel system for leaks


Hose clamps 3094

Cooling system tester V.A.G 1274 with adapterV.A.G 1274/2

ALeaks in the fuel system may result in the following:

Foam build-up or air bubbles in the supply pipe

Loss of power, misfiring

Starting problems Work sequence

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Attach adapter 1274/2 to cooling system tester V.A.G 1274. - Unscrew return pipe from injection pump and connect hose from adapter V.A.G 1274/2 in its place.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Fit hose clamps 3094 at the following points: - On supply hose downstream of fuel filter - On return hose downstream of fuel filter - On return hose from injection pump - Use hand pump on tester to create a pressure of between 1.0 and 1.5 bar. - If the pressure constantly drops, locate leak and eliminate fault.Note: By moving the hose clamps from the filter to the fuel tank connections it is also possible to test the fuel hoses.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Servicing accelerator linkage

1 - Bush 2 - Circlip 3 - Accelerator pedal 4 - Torsion spring 5 - 10 Nm 6 - Spring washer 7 - Cable cam 8 - Square nut 9 - Mounting 10 - Accelerator position sender -G79 Installing and adjusting => Page 20-35 11 - 10 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


Testing accelerator position sender -G79


V.A.G 1526 A

V.A.G 1594 A

V.A.G 1598/18

VAS 5051 withVAS 5051/1andVAS 5051/2

or

V.A.G 1551 with V.A.G 1551/1

Accelerator position sender -G79 is located on the accelerator pedal. Its function is to tell the control unit what position the pedal is in. - Remove cover from additional relay carrier I on left of plenum chamber.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Connect up vehicle diagnostic, testing and information system VAS 5051 with diagnostic cable VAS 5051/1 and diagnostic adapterVAS 5051/2. Alternatively, connect fault reader V.A.G 1551 using diagnostic cable V.A.G 1551/1.Note: The following description refers only to the diagnostic procedure using fault reader V.A.G 1551. When using vehicle diagnostic, testing and information system VAS 5051, follow the instructions in the operating manual for the equipment. - With the ignition switched off, connect black connector to black diagnostic connection.

V.A.G - SELF DIAGNOSIS HELP Indicated in display1 - Rapid data transfer 1) 2 - Flash code output 1)

1)appears alternately - Connect white connector to white diagnostic connection (blue connector is not used). - Switch on ignition. - Switch on fault reader printer with the print key. The warning lamp in key should light up. - Press key 1 for "Rapid data transfer".

Rapid data transfer HELP When this display appears:Enter address word XX

- Press keys 0 and 1 for address word "Engine electronics" and

900058 Type4A


Gearbox IDCUT

UserMICLEF


confirm entry with Q key.

028906021A 1.9l R4 EDC SG D .. ⇒ The display on fault reader V.A.G 1551 will show the control unit Coding 00000 WSC 00000 identification, as in thisexample.

- Press ⇒ key twice to advance the programme sequence.

Rapid data transfer HELP When this display appears:Select function XX

- Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

Read measured value block Q When this display appears:Enter display group number XXX

- Press keys 0, 0 and 2 for "Display group number 002" and confirm entry with Q key.

Read measured value block 2 ⇒ Indicated on display:0 rpm 0.0 % 0 1 0 18.4 5C

- Check display in display zone 2 (accelerator pedal position). - Specification: 0.0 % (accelerator not depressed) - Check display in display zone 3. - Specification: 0 1 0 (accelerator not depressed) 0 0 0 (accelerator depressed) - Press accelerator pedal down slowly.

Read measured value block 2 ⇒ Indicated on display:0 rpm 100 % 0 0 0 18.4 5C - Specification: The value in display zone 2 should increase

steadily to 100 % (accelerator fully depressed). On vehicles with an automatic gearbox the kickdown switch pressure point must be distinctly felt before the full throttle stop position is reached. - If the specifications for the initial and/or final readouts are not obtained, adjust accelerator position sender -G79 => Page 20-35. If the display does not change or only changes irregularly: - Switch off ignition. - Unplug connector for accelerator position sender -G79 (located

900058 Type4A


Gearbox IDCUT

UserMICLEF


in footwell on accelerator pedal).

- Set hand-held multimeter V.A.G 1526 to resistance measuring range and connect to the following contacts on connector for accelerator position sender -G79 using test leads from V.A.G 1594 A:

Contacts Accelerator Specification1 + 3 Not depressed 0.8 ... 1.4 kΩ2 + 3 Not depressed 0.8 ... 1.4 kΩ4 + 6 Not depressed 0.8 ... 1.2 kΩ

Depressed ∞ Ω5 + 6 1) Not depressed ∞ Ω

Fully depressed 0.8 ... 1.2 kΩ1)Only on vehicles with automatic gearbox. - If the specifications are not obtained, renew accelerator position sender -G79. Testing voltage supply

- Set hand-held multimeter V.A.G 1526 to voltage measuring range (20 V direct current) and connect it to contacts 2 and 3 on connector. - Switch on ignition. - Specification: approx. 5 VIf the specification is obtained: - Check the wiring. Testing wiring

900058 Type4A


Gearbox IDCUT

UserMICLEF


- With the ignition switched off, connect test box V.A.G 1598/18 to connector -1- (the control unit -2- remains disconnected). - Remove storage compartment (shelf) on driver's side.=> General body repairs; Repair group 70; Dash panel; Removing driver's side shelf=> - Unplug connector for accelerator position sender -G79 (located in footwell on accelerator pedal).

- Test for open circuit and short to positive or earth in the following wiring connections:

Connector Test box V.A.G 1598/18Contact Socket

1 152 573 554 656 1, 24, 465 1) 62

1)Only on vehicles with automatic gearbox. - Rectify any open/short circuit as necessary.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Installing and adjusting accelerator position sender -G79

Note: To renew accelerator position sender -G79, first remove the accelerator pedal. Special tools and workshop equipment required

Setting jig 3226 Work sequence

- Turn accelerator position sender -10- anticlockwise as far as possible in slots in bracket -9- and tighten bolts to secure in position. - Fit eye from cable cam -7- onto stud on accelerator pedal -3- (pedal is already in position). - The eye must be properly seated in the slot on the cable cam. - The cable cam must be able to turn freely on the shaft of the accelerator position sender. - Turn the cable cam anticlockwise slightly and pull the accelerator pedal until it touches the stop on the bracket. - Secure the cable cam in its new position on accelerator position sender -10- by tightening the nut and counterholding with an open-ended spanner (AF 17) on the flats of the cable cam. - Install the pre-assembled throttle mechanism in the vehicle and adjust as follows: - Remove the full-throttle stop.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Push together setting jig 3226 and screw it in the hole instead of the full-throttle stop. - The threaded section of the setting jig must be screwed in as far as it will go. - Pull apart the setting jig and lock it in position with the pin -arrow-. - Slacken bolts securing accelerator position sender and turn sender so that accelerator pedal rests against setting jig without exerting pressure. - Tighten bolts to secure accelerator position sender in this position. - Remove setting jig and install full-throttle stop.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Charge air system with turbocharger

Notes:

Observe rules for cleanliness => Page 21-21.


Charge air system must be free of leaks.

When performing repairs, replace gaskets, seals, self-locking nuts and stretch bolts which have to be tightened to a specified angle.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Diagram of connections for charge pressure control system

1 - Control unit with intake manifold pressure sender -G71 2 - Pressure unit For charge pressure control Testing =>Page 21-12 3 - Pressure connection on turbocharger Pressure supply for charge pressure control 4 - Solenoid valve for charge pressure control -N75 Position: front left of engine compartment Testing =>Page 21-14 5 - Charge air cooler

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking turbocharger and charge pressure control system

Safety notes Note the following points if test equipment has to be used during a road test: Warning

Test equipment must always be secured on the rear seat and operated from the rear seat by a second person.

If test equipment is operated from the front passenger seat, the occupant could be injured by the passenger's airbag in an accident. Requirements for test:

Fault memory has been interrogated => Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Interrogating and erasing fault memory=>

Final control diagnosis has been performed => Diesel direct injection and glow plug system (4-cylinder TDI; => Repair group 01; Final control diagnosis=>

No leaks in intake or exhaust system

No faults in engine or injection system, e.g compression pressure, injectors or commencement of injection.

Coolant temperature at least 80 °C

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking charge pressure

To isolate the cause of the fault, first check the turbocharger on its own (without charge pressure control), then check the charge pressure with charge pressure control.


Turbocharger tester V.A.G 1397 A

VAS 5051 with VAS 5051/1and VAS 5051/2

or

V.A.G 1551 with V.A.G 1551/1 Test sequence

- Connect measuring hose from turbocharger tester V.A.G 1397/ A to connecting pipe and secure with a hose clamp -arrow-. - Route measuring hose under rear edge of bonnet and into passenger compartment via right-hand window.Testing charge pressure without charge pressure control:

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Unplug connector -arrow- at charge pressure control solenoid valve.

- Switch on turbocharger tester and set measuring range selector switch to position -I- (absolute pressure). - Connect measuring hose to connection -I-.Notes:

Hose connections must be completely airtight, otherwise measurements will not be correct.

Ensure that measuring hose is not pinched at bonnet or side window.

Pressing memory key M on turbocharger tester will store the last measured value until memory key M is pressed again or tester is switched off.

The decimal point in the display flashes to indicate that the value is being stored.

If the battery voltage of the turbocharger tester drops below the minimum level, an arrow will appear at the top left of the display.

Observe safety notes => Page 21-3. - Read measured value block, Display Group 011 => Diesel direct injection and glow plug system (4-cylinder TDI);

900058 Type4A


Gearbox IDCUT

UserMICLEF


=> Repair group 01; Reading measured value block=>

Read measured value block 11 ⇒ Indicated on display:840 rpm 938 mbar 978 mbar 92 %

- Measure the charge pressure at full throttle. - Accelerate from 1500 rpm at full throttle in third gear (or with selector lever at position 2), and watch rev counter. - Press PRINT key on V.A.G 1551 and the memory key -M- on V. A.G 1397 A simultaneously at approx. 3000 rpm. Specifications:

Specification for V.A.G 1397/A:

1.550 ... 1.750 bar

Read measured value block 11 ⇒ Specification for display zone 3 on V.A.G 1551:3040 rpm 1846 mbar 1693 mbar 39 %

1550 ... 1750 mbar Note: The charge pressure should bemeasured with turbocharger tester V.A.G 1397/A. Fault reader V.A.G 1551 is used to check whether the charge pressure is being registered by the control unit. - If the measured charge pressure is OK., repeat charge

900058 Type4A


Gearbox IDCUT

UserMICLEF


pressure measurement with charge pressure control active =>Page 21-10. If the charge pressure is not attained:

Leak between turbocharger and intake manifold

Fault in linkage or pressureunit for charge pressure control; Checking => Page 21-12

Turbocharger defective (turbine jammed by foreign body) If the charge pressure is exceeded:

Hose connections for charge pressure control loose, leaking, or blocked

Charge pressure control solenoid valve blocked

Actuating mechanism (linkage or shaft) of bypass valve does not move easily or is sticking (valve does not open). Testing charge pressure with charge pressure control: - Connect connector to charge pressure control solenoid valve -N75. - Erase fault memory. Note: A fault was stored in the fault memory when the connector for charge pressure control solenoid valve -N75 was disconnected. - Read measured value block, Display Group 011. => Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Reading measured value block=>

Read measured value block 11 ⇒ Indicated on display:840 rpm 938 mbar 978 mbar 92 %

- Measure the charge pressure at full throttle. - Accelerate from 1500 rpm at full throttle in third gear (or with

900058 Type4A


Gearbox IDCUT

UserMICLEF


selector lever at position 2), and watch rev counter. - Press PRINT key on V.A.G 1551 and the memory key -M- on V. A.G 1397 A simultaneously at approx. 3000 rpm. Specifications:

Specification for V.A.G 1397/A:

1.800 ... 2.050 bar

Read measured value block 11 ⇒ Specification for display zone 3 on V.A.G 1551:3090 rpm 1866 mbar 1917 mbar 62 %

1800 ... 2050 mbar If the charge pressure is not attained:

Electrical fault in charge pressure control solenoid valve

Charge pressure control solenoid valve -N75 is jammed in the open position If the charge pressure is exceeded:

Charge pressure control solenoid valve -N75 is jamming at times in the closed position

Charge pressure has been increased as a result of tuning

900058 Type4A


Gearbox IDCUT

UserMICLEF


Testing linkage and pressure unit for charge pressure control valve

Test requirement:

Coolant temperature at least 80 °C

Test sequence - Remove air intake pipe -arrow- between lock carrier and air cleaner housing.

- Unplug connector -arrowon charge pressure control solenoid valve.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Start the engine and increase to maximum rpm briefly by operating throttle. - Operating rod -2- for charge pressure control valve should move.If the operating rod does not move: - Check charge pressure control valve lever -1- for ease of movement. If lever has seized due to corrosion, install new turbocharger. If the operating rod does not move, even though the lever is free to move: - Renew pressure unit for charge pressure control valve -3-. - Erase fault memory. Note: A fault was stored in the fault memory when the connector for charge pressure control solenoid valve -N75 was disconnected.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Testing charge pressure control valve -N75


V.A.G 1526 A

V.A.G 1594 A

V.A.G 1598/18

Testing internal resistance - Switch off ignition.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Pull connector off charge pressure control solenoid valve -N75. - Connect multimeter to valve (resistance measurement range) - Specification: 25 ... 45 ΩIf the specification is not obtained: - Renew charge pressure control solenoid valve -N75. Testing voltage supply

- Connect multimeter (voltage test range) between contact 2 and earth. - Switch on ignition. - Specification: approx. battery voltageIf the specification is not obtained: - Test wiring for open circuit and short to positive or earth: => Current flow diagrams, Electrical fault finding and Fitting locations Testing control signal wiring - Switch off ignition.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove lower section of right-hand A-pillar trim and also right -hand sill panel trim around front door.=> General body repairs; Repair group 70; Trims; Removing and installing A-pillar trim and Removing and installing inner sill panel trim=> - Pull back floor covering at front of right-hand footwell. (If necessary, cut open the perforated seam on the left with a knife. )

- Remove screws on cover for electronics box -arrows-. - Carefully detach upper and lower sections of cover.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Pull out cross-piece (arrow -3-) together with attached components. - Remove screws (arrows -1- and -2-). - Take out engine control unit. - Disengage retainer clip and unplug control unit connector.Note: Always make sure that the ignition is switched off before unplugging or fitting the connector for the diesel direct injection system control unit.

- With the ignition switched off, connect test box V.A.G 1598/18 to connector -1- (the control unit -2- remains disconnected).

900058 Type4A


Gearbox IDCUT

UserMICLEF




1 47 - Rectify any open/short circuit as necessary. - If the wiring is OK, fit a new engine control unit:=> Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 23; Servicing diesel direct injection system;=> => Renewing control unit for engine electronics

Testing intake manifold pressure sender The intake manifold pressure sender is located in the diesel direct injection system control unit. Special tools and workshop equipment required


or

V.A.G 1551 with V.A.G 1551/1 Test sequence - Read measured value block, Display Group 010. => Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Reading measured value block=>

Read measured value block 10 ⇒0 mg/H 1027 mbar 1013 mbar 0.0 %

Indicated on display: - Check displays in display zones 2 and 3. - Specification: The pressures should be the same. Tolerance: ± 30 mbar

If the specification is not obtained:

- Disconnect pressure hose from engine control unit.

If the specification is still not obtained:

- Fit a new engine control unit:

MICLEF=> Diesel direct injection and glow plug system (4-cylinder TDI);

=> Repair group 23; Servicing diesel direct injection system;=>

=> Renewing control unit for engine electronics

900058 Type4A


Gearbox IDCUT

UserMICLEF


Rules for cleanliness

When working on theturbocharger, pay careful attention to the following "5 rules":

Thoroughly clean all unions and the adjacent areas before disconnecting.

Place parts that have been removed on a clean surface and cover them over. Do not use fluffy cloths.

Carefully cover over or seal opened components if the repair cannot be completed immediately.

Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored loose (e.g. in tool boxes etc.).

When the system is open: Do not work with compressed air if this can be avoided. Do not move vehicle unless absolutely necessary.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing turbocharger - overview

1 - Pressure unit For charge pressure control 2 - Bracket 3 - 10 Nm 4 - 10 Nm Lock nut for operating rod -Item 6- Adjusting=>Page 21-27 5 - Securing clip 6 - Operating rod For charge pressure control valve Adjusting=>Page 21-27

900058 Type4A


Gearbox IDCUT

UserMICLEF


7 - 10 Nm Install with locking fluid D 000 600 A2 8 - Gasket Renew 9 - 25 Nm Renew 10 - 25 Nm 11 - Oil supply pipe From cylinder head to turbocharger Tighten union nut to 25 Nm 12 - Banjo bolt, 25 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


13 - Seals Renew 14 - Exhaust manifold With connection for exhaust gas recirculation 15 - Intake manifold Removing and installing => Page 15-11 16 - Cap For charge pressure test connection Secure with hose clamp 17 - Gasket Renew 18 - From charge air cooler 19 - 25 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


20 - 30 Nm Renew Coat threads and bolt head seating surface with high -temperature lubricant "G 052 112 A3" 21 - Gasket Renew Note installation position 22 - 25 Nm Renew 23 - Heat shield 24 - 25 Nm Renew 25 - Turbocharger Checking => Page 21-3onwards Removing and installing => Page 21-29 Fill with engine oil at connection for oil supply pipe 26 - From air cleaner

900058 Type4A


Gearbox IDCUT

UserMICLEF


27 - To solenoid valve for charge pressure control -N75 Diagram of connections =>Page 21-2 28 - 40 Nm 29 - Seal Renew 30 - Oil return pipe To cylinder block 31 - Seal Renew 32 - Banjo bolt, 30 Nm 33 - To charge air cooler 34 - From solenoid valve for charge pressure control -N75 Diagram of connections =>Page 21-2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing pressure unit for charge pressure control valve

Removing - Remove turbocharger => Page 21-29.

- Unclip securing clip -4-. - Unscrew bolts -2-. - Take pressure unit -6- off.Installing - Apply locking fluid D 000 600 A2 to bolts -2- for pressure unit -6 -, install on turbocharger and tighten to 10 Nm. - Loosen operating rod -3- lock nut -1-. - Pivot charge pressure control valve lever -5- in towards pressure unit onto stop and hold. - Adjust rod length -3- so that the rod eye will fit easily on lever pin -5-. (Lever lies against stop with no play).

- From this position, screw in operating rod 8 full turns (rod shortens). - Tighten lock nut -1-. - Fit operating rod on to lever and install securing clip -4-. - Install turbocharger => Page 21-32.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing turbocharger

Removing

- Remove noise insulation (two sections, -arrows-). - Place a drip tray underneath.

- Detach oil return pipe from cylinder block -arrow-.Vehicles with air conditioner: - Remove ribbed belt => Page 13-11.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Warning!The air conditioner refrigerant circuit must not be opened.

- Remove A/C compressor and secure to body with wire.All models - Remove air intake pipe -arrow- between lock carrier and air cleaner housing.

- Disconnect wires/unplug connectors as follows: 1 -Exhaust gas recirculation valve -N18 2 -Air mass meter -G70 4 -Charge pressure control solenoid valve -N75 5 -Intake manifold temperature sender -G72 - Disconnect vacuum hose from mechanical exhaust gas recirculation valve -3-. - Disconnect thin hose -6- from bottom of exhaust gas recirculation valve -N18. - Move wiring and hoses clear. - Detach air hose at air mass meter. - Remove upper section of air cleaner housing together with air mass meter. - Remove front air intake hose from turbocharger.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove air intake hose -5- between turbocharger and charge air cooler. - Unscrew oil supply pipe -3- at turbocharger. - Unbolt bracket -2- for oil supply pipe from exhaust manifold. - Disconnect hose -6- from pressure unit for charge pressure control. - Disconnect hose -4- from turbocharger. - Unscrew nuts -1- securing turbocharger to catalytic converter. - Unscrew bolts securing turbocharger to exhaust manifold and remove turbocharger.Installing Installation is carried out in the reverse order, when doing this note the following: Notes:

Apply high-temperature paste G 052 112 A3 to threads and bolt head contact surfaces of turbocharger bolts.

Fill turbocharger with engine oil at connection for oil supply pipe.


Always renew seals, gaskets and self-locking nuts.

Charge air system must be free of leaks.

To ensure adequate lubrication of turbocharger, let engine idle for about one minute after installing turbocharger and do not increase engine speed immediately. - Check oil level => Page 17-19. Tightening torques

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 4 -Component Nm

Turbocharger to exhaust manifold 30Turbocharger to catalytic converter 25Oil return pipe to cylinder block 30Oil supply pipe to turbocharger 25Hose clamps 2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing parts of charge air cooling system

Notes:

Secure all hose connections with the correct hose clips (same as original equipment) => Parts Catalogue

Charge air system must be free of leaks. 1 - Air ducting 2 - 20 Nm 3 - Washer 4 - Front retaining bracket 5 - Rubber grommet For front retaining bracket

900058 Type4A


Gearbox IDCUT

UserMICLEF


6 - Charge air cooler (intercooler) Removing and installing => Page 21-37 7 - 20 Nm 8 - Cheese head bolt - 20 Nm With shoulder 9 - Rubber grommet For rear retaining bracket 10 - Rear retaining bracket 11 - Air intake hose Between intake manifold and charge air cooler (intercooler) 12 - Air intake hose Between turbocharger and charge air cooler (intercooler)

900058 Type4A


Gearbox IDCUT

UserMICLEF


13 - Vacuum pipe To engine control unit In engine wiring harness Must not be lengthened or shortened When renewing, use same length and inside diameter=> Parts List 14 - Self-tapping screw

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing charge air cooler (intercooler)

Removing - Remove front bumper. => General body repairs; Repair group 63; Front bumper=> - Remove air intake pipe -arrow- between lock carrier and air cleaner housing.

- Disconnect wires/unplug connectors as follows: 1 -Exhaust gas recirculation valve -N18 2 -Air mass meter -G70 4 -Charge pressure control solenoid valve -N75 5 -Intake manifold temperature sender -G72 - Disconnect vacuum hose from mechanical exhaust gas recirculation valve -3-. - Disconnect thin hose -6- from bottom of exhaust gas recirculation valve -N18. - Move wiring and hoses clear. - Detach air hose at air mass meter. - Remove upper section of air cleaner housing together with air mass meter.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove front air intake hose from turbocharger. - Remove air duct -1- between charge air cooler and intake manifold. - Remove air intake hose between turbocharger and charge air cooler. - Remove lower section of air cleaner housing.

- Unscrew rear bolt -arrow-.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove front section of noise insulation -lower arrows-. - Disengage air ducting from charge air cooler.

- Pull charge air cooler out of rubber mountings at the front -arrows-. - Take out charge air cooler from underneath.Installing Installation is carried out in the reverse order. Tightening torques

Component NmCharge air cooler to retaining bracket

20Hose clamps 2

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing parts of exhaust system Notes:


After working on the exhaust system ensure that the system is not under stress, and that it has sufficient clearance from the bodywork. If necessary, loosen clamp and align silencers and exhaust pipe so that sufficient clearance is maintained to the bodywork at all points and the mountings are evenly loaded.

Do not bend the flexible connection (de-coupling element) in the exhaust system more than 10 °, otherwise it may be damaged.

Removing and installing floor cross member =>Fig.3, Page26-5.

After installing exhaust system, knock back retaining tabs on exhaust mountings approx. 90°=>Fig.1, Page 26-4and Fig.2, Page 26-4.

900058 Type4A


Gearbox IDCUT

UserMICLEF


1 - 25 Nm Renew 2 - Clamp 3 - Seal Can be damaged by knocks; do not drop on the floor 4 - Clamp 5 - Rear silencer Aligning exhaust system free of stress => Page 26-10 6 - Front silencer Aligning exhaust system free of stress => Page 26-10 7 - 40 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


8 - Clamp Align exhaust system so it is free of stress before tightening clamp => Page 26-10. Installation position: bolted connection on the right Position of bolts => Fig.4 Tighten bolted connections evenly. 9 - Catalytic converter With flexible connection (de -coupling element) Do not bend flexible connection more than10°- otherwise it can be damaged Protect from damage by knocks and impact Removing and installing => Page 26-8 10 - Gasket Renew 11 - 25 Nm Renew

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 4 -Fig.1Bending back retaining tabs on front exhaust

mountings

Front and rear silencers - After installing exhaust system, knock back retaining tabs -arrows- approx. 90°. - Maintain a clearance (distance -a-) between mounting ring and retaining tab. - Distance a = 2 mm

Fig.2Bending back retaining tabs on rear exhaust mountings

Rear silencer - After installing exhaust system, knock back retaining tabs -arrows- approx. 90°.

900058 Type4A


Gearbox IDCUT

UserMICLEF

Workshop Manual- 5 -Fig.3Removing and installing floor cross member

Tightening torque: 20 Nm

Fig.4Installation position of clamp - Fit clamp in horizontal position. - Bolted connection faces right

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing exhaust manifold

Removing - Remove turbocharger=>Page 21-29. - Unbolt heat shield. - Unbolt exhaust gas recirculation pipe.

- Unscrew all nuts -arrows- on exhaust manifold. - Remove washers and take off exhaust manifold. Installing Installation is carried out in the reverse order, when doing this note the following: Note: Fit new gaskets and self-locking nuts. - Install turbocharger=>Pages 21-32. Tightening torques

Component NmExhaust manifold to cylinder head 25Heat shield to exhaust manifold 25Exhaust gas recirculation pipe to exhaust manifold

25

900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing front exhaust pipe with catalytic converter

Removing

Note: Do not bend the flexible connection (de-coupling element) in the exhaust system more than 10 °, otherwise it may be damaged. - Unscrew bolts securing turbocharger to catalytic converter -arrows-. - Disconnect front exhaust pipe with catalytic converter from turbocharger.

- Remove noise insulation (2 sections) -arrows-. - Slacken clamp on exhaust system. - Slide the clamp towards the rear and remove the exhaust pipe.Installing Installation is carried out in the reverse order, when doing this note the following: Note: Fit new gaskets and self-locking nuts. - Aligning exhaust system free of stress => Page 26-10.

MYTightening torques

Component NmCatalytic converter to turbocharger 25Clamp for exhaust pipe 40

900058 Type4A


Gearbox IDCUT

UserMICLEF


Stress-free alignment of exhaust system

The exhaust system must be aligned when cold.

- Slacken bolted connections on clamp -Item 8-, Page 26-3. - Push exhaust system towards front of vehicle -arrow- so that rear mounting of rear silencer is pre-loaded by amount a = 7 ... 10 mm. - Tighten bolted connections on clamp evenly to 40 Nm.Aligning tailpipes

- Align tailpipes so that distance -a- is the same on both sides.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking exhaust system for leaks - Start engine and run at idling speed. - Plug tailpipes (e.g. with rags or stoppers) until check is completed. - Listen for noise at the connection points (cylinder head/ manifold, manifold/turbocharger, turbocharger/catalytic converter, etc.) to locate any leaks. - Rectify any leaks that are found.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Exhaust gas recirculation system Notes:

The exhaust gas recirculationsystem is activated by the diesel direct injection system control unit -J248 via the exhaust gas recirculation valve -N18 and themechanical exhaust gas recirculation valve.

The tapered plunger in the mechanical exhaust gas recirculation valve gives an opening of variable cross-section for different amounts of valve travel.

All required valve positions can beachieved by means of pulsed control.



900058 Type4A


Gearbox IDCUT

UserMICLEF


Removing and installing parts of exhaust gas recirculation system

1 - Intake manifold 2 - Gasket Renew 3 - Exhaust gas recirculation valve Checking => Page 26-16 4 - 25 Nm 5 - Gasket Renew 6 - 25 Nm

900058 Type4A


Gearbox IDCUT

UserMICLEF


7 - Exhaust gas recirculation pipe When installing, just nip all bolts (parts must be just free to move), then tighten stress free 8 - 25 Nm 9 - Gasket Renew 10 - Exhaust manifold Removing and installing => Page 26-6

900058 Type4A


Gearbox IDCUT

UserMICLEF


Diagram of vacuum hose connections

1 - Brake servo 2 - Vacuum connection 3 - Vacuum pump (exhauster) For brake servo 4 - Mechanical exhaust gas recirculation valve 5 - Exhaust gas recirculation valve -N18 6 - Air cleaner 7 - Breather pipe To air cleaner

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking mechanical exhaust gas recirculation valve


V.A.G 1390 Test sequence - Pull vacuum hose off mechanical exhaust gas recirculation valve. - Connect hand vacuum pump V.A.G 1390 to valve. - Operate pump. - The diaphragm rod should move towards the vacuum connection.

Note: Watch the diaphragm rod through the opening -arrow-. - Pull hose of hand vacuum pump off exhaust gas recirculation valve. - The valve must be clearly heard to close. The diaphragm rod should move towards the intake manifold.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Testing exhaust gas recirculation The function of the exhaust gas recirculation system is tested by checking the mass of air inducted. If exhaust gas is being recirculated, a smaller quantity of fresh air is registered by the air mass meter. The more exhaust gas recirculated, the weaker the signal from the air mass meter. Special tools and workshop equipment required


or

V.A.G 1551 with V.A.G 1551/1Test requirement:

Coolant temperature at least 80 °C Test sequence - Read measured value block, Display Group 001: => Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Reading measured value block=>

900058 Type4A


Gearbox IDCUT

UserMICLEF


Read measured value block 1 ⇒840 rpm 6.5 mg/H 1.480 V 87.3 5C

Indicated on display: - Check display in display zone 4 (coolant temperature). - Specification: at least 80 °C - Wait until the coolant has reached the specified temperature before continuing with the test. - Read measured value block, Display Group 003.

Read measured value block 3 " Indicated on display:840 rpm 272 mg/H 268 mg/H 54 %

- Briefly depress the accelerator pedal, then allow the engine to continue running at idling speed. - Observe displays in display zones 2 and 3.

Display zone Possible cause of fault2 (spec.) 3 (actual)

230...370 230...370 Okaymg/H mg/H

> 370 mg/ > 370 mg/ Engine too coldH H Electrical equipment on

Temperature of intake manifold too highInjection pump too lean

230...370 < 230 mg/ Unmetered airmg/H H Too much EGR

230...370 > 370 mg/ Too little EGRmg/H H or none at all

Constant Fixed substitute value caused by open 425 mg/H circuit in wiring to air mass meter or

implausible air mass signal Note: If display zone 3 shows a constant value of 425 mg/H, check the air mass meter:

900058 Type4A


Gearbox IDCUT

UserMICLEF


=> Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 23; Testing exhaust gas recirculation;=> => Testing air mass meter -G70 If the specifications are not obtained: - Start final control diagnosis and activate exhaust gas recirculation valve -N18: => Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 01; Final control diagnosis=>

Final control diagnosis ⇒ Indicated on display:Exhaust gas recirculation valve -N18 The valve shouldclick.

If the valve does not click:

- Test exhaust gas recirculation valve -N18 => Page 26-21. If the valve clicks: - Check vacuum hose connections => Page 26-15. If vacuum hose connections are OK: - Check mechanical exhaust gas recirculation valve => Page 26-16.

900058 Type4A


Gearbox IDCUT

UserMICLEF


Checking exhaust gas recirculation valve -N18


V.A.G 1526 A

V.A.G 1594 A

V.A.G 1598/18

Testing internal resistance - Switch off ignition. - Unplug connector from exhaust gas recirculation valve.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Connect multimeter to valve (resistance measurement range) - Specification: 14 ... 20 ΩNote: The resistance will be at lower end of tolerance at room temperature, and at upper end of tolerance at engine operating temperature. If the specification is not attained: - Fit new exhaust gas recirculation valve -N18. Testing voltage supply

- Connect multimeter (voltage measurement range) between contact 1 and earth. - Switch on ignition. - Specification: approx. battery voltageIf the specification is not obtained: - Test wiring for open circuit and short to positive or earth. => Current flow diagrams, Electrical fault finding and Fitting locations Testing control signal wiring - Switch off ignition.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Remove lower section of right-hand A-pillar trim and also right -hand sill panel trim around front door.=> General body repairs; Repair group 70; Trims; Removing and installing A-pillar trim and Removing and installing inner sill panel trim=> - Pull back floor covering at front of right-hand footwell. (If necessary, cut open the perforated seam on the left with a knife. )

- Remove screws on cover for electronics box -arrows-. - Carefully detach upper and lower sections of cover.

900058 Type4A


Gearbox IDCUT

UserMICLEF


- Pull out cross-piece (arrow -3-) together with attached components. - Remove screws (arrows -1- and -2-). - Take out engine control unit. - Disengage retainer clip and unplug control unit connector.Note: Always make sure that the ignition is switched off before unplugging or fitting the connector for the diesel direct injection system control unit.

- With the ignition switched off, connect test box V.A.G 1598/18 to connector -1- (the control unit -2- remains disconnected).

900058 Type4A


Gearbox IDCUT

UserMICLEF




2 25 - Rectify any open/short circuit as necessary. - If the wiring is OK, fit a new engine control unit:=> Diesel direct injection and glow plug system (4-cylinder TDI); => Repair group 23; Servicing diesel direct injection system; Renewing control unit for engine electronics=>

49543166 Audi a4 b4 Engine TDI 1 9 1Z and AHU Service Manual

Documents

sill panel

observe safety

erasing fault

final control

reducing service

pay careful

air mass meter

electric window