ARTICLE BEGINNING ENGINE IDENTIFICATION - …ww2.justanswer.com/uploads/HE/heavychevy396/2013... · 05/08/2013 · ARTICLE BEGINNING ENGINE IDENTIFICATION ... Mark drive shaft for

ARTICLE BEGINNING

ENGINE IDENTIFICATION

Engine may be identified using Vehicle Identification Number (VIN) stamped on a metal pad,

located near lower left corner of windshield. The eighth character identifies the engine model. SeeENGINE IDENTIFICATION CODES table.

Engine identification code, located on cylinder block below cylinder head, may be required when

ordering replacement parts.

ENGINE IDENTIFICATION CODES

ADJUSTMENTS

VALVE CLEARANCE ADJUSTMENT

1. Bring No. 1 cylinder to firing position and align timing marks on front cover and harmonic balancer. Adjust exhaust valves on cylinders No. 1, 3, 4 and 8 (on V8 engines or 1, 5 and 6 on V6 engines) by backing off adjusting nut until valve lash is felt at push rod.

2. Tighten adjusting nut (while rotating push rod) until valve lash is eliminated. Tighten adjustingnut an additional 3/4 - 1 1/4 turns. Repeat adjustment on intake valves for cylinders No. 1, 2, 5, and 7 (on V8 engines or 1, 2 and 3 on V6 engines).

3. Turn engine one revolution to firing position for cylinder No. 6 (on V8 engines or No. 4 on V6 engines). Adjust exhaust valves on cylinders No. 2, 5, 6 and 7 (on V8 engines or 2, 3 and 4 on

V6 engines). Adjust intake valves on cylinders No. 3, 4, 6 and 8 (on V8 engines or 4, 5 and 6 on V6 engines).

TROUBLE SHOOTING

REMOVAL & INSTALLATION

NOTE: For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.

Application Engine Code VIN Code

5.7L (350") PFI V8 LT1 P

NOTE: Normally, valve adjustment is not required. If valve train components are disassembled or replaced, use adjustment procedure.

NOTE: To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

Page 1 of 215.7L V8 - VIN [P] -1994 Pontiac Firebird Formula

8/5/2013http://www.ondemand5.com/mric/common/asp/printart.aspx

GENERAL PRECAUTION

FUEL PRESSURE RELEASE

Loosen fuel tank filler cap. Connect Fuel Gauge (J-34730-1) to fuel pressure connection mounted on fuel rail, on right side of fuel pressure regulator. Wrap shop towel around fitting during installation to

avoid spillage. Install bleed hose. Turn gauge valve, and drain fuel into an appropriate container.

ENGINE

Removal (Camaro & Firebird)

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Disconnectnegative battery cable and then positive cable. Raise and support vehicle.

2. Remove front wheels. Drain coolant and engine oil. Remove crossover pipe from intermediate pipe. On A/T, remove torque converter bolts/screws. On all vehicles, remove front fascia lower deflectors.

3. Remove stabilizer bar bolts/screws. Remove serpentine drive belt. Remove A/C hose assembly from condenser and compressor. Disconnect transmission fluid cooler lines from radiator

assembly (A/T). Remove lower radiator hose. Remove lower heater hose from water pump. Remove electrical ground straps from right side of engine.

4. Remove shift linkage from transmission assembly. Mark drive shaft for reassembly and remove. Remove torque arm from transmission assembly. Remove intermediate steering shaft from rack and pinion assembly. Remove electrical ground straps from left side of frame rail. Disconnect electrical connectors from wheel speed sensor assemblies. Lower vehicle.

5. Remove air intake duct. Remove fuel lines from fuel rail assembly. Remove accelerator control/cruise control servo cable adjuster assembly (if equipped). Remove cruise and

accelerator control cables from throttle body assembly.

6. Remove upper and lower radiator hoses from water pump. Remove brake booster vacuum

hose. Remove upper heater hose from water pump. Disconnect coolant air bleed pipe hose from radiator assembly. Disconnect A/C receiver and dehydrator hose from condenser.Disconnect A/C hose from expansion tube.

7. Disconnect brake lines from ABS brake combination valve. Remove P/S reservoir and position aside.Disconnect lines and clips from ABS hydraulic modulator assembly. Remove right side body hinge pillar trim panel assembly.

8. Disconnect 3 engine wiring harness connectors (Blue, Black and White) and evaporator

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

NOTE: For reassembly reference, label all electrical connectors, vacuum hoses and fuel lines before removal. Also place mating marks onto engine hood and other major assemblies before removal.



temperature sensor connector. Disconnect forward lighting wiring harness connectors.

Disconnect PCM with harness and place PCM and harness on top of engine. Pull engine wireharness through front of dash and place harness on top of engine. Disconnect positive lead at generator. Disconnect positive lead at junction block. Disconnect negative lead at mounting stud (next to junction block).

9. Remove lower shock attachment bolt/screws and nuts from lower control arm. Disconnectupper control arm ball stud assembly from steering knuckle assembly. Raise and support vehicle.

10. Position Lift Table (204-BX-75G) under engine and frame assembly. Remove engine frame

and transmission support bolts/screws. Raise vehicle from engine, transmission and engine frame assemblies.

11. Secure strut assemblies to engine frame. Remove transmission assembly. On M/T, removeclutch housing and clutch assembly. Remove P/S lines from P/S pump. Remove hoses from A/C compressor. Remove A/C compressor bolts/screws and compressor. Remove engine mount through-bolts and/or screws. Remove engine assembly from engine frame.

Installation (Camaro & Firebird)

To install, reverse removal procedure. Bleed brake system. Bleed power steering system. Charge A/C system. Align wheels. Inspect all systems for leaks.

Removal (Corvette)

1. Release fuel pressure. See FUEL PRESSURE RELEASE under REMOVAL & INSTALLATION. Disconnect negative battery cable. Drain cooling system. Remove air intakeduct. Disconnect electrical wiring and vacuum connections from top of engine.

2. Disconnect coolant hoses from water pump and throttle body. Remove left wheelwell center

panel. Remove serpentine belt. Remove alternator, power steering pump and A/C compressor from brackets, and position aside. Disconnect wiper motor electrical connector. Remove wiper motor cover.

3. Remove Air Injection Reactor (AIR) diverter valve hose. Disconnect fuel lines from fuel rail. Disconnect power steering hoses from steering fluid reservoir. Disconnect accelerator cable from throttle body. Raise and support vehicle.

4. Remove starter. Disconnect exhaust pipe from manifold and remove exhaust system from vehicle. Remove flexplate/flywheel cover. On A/T models, remove torque converter bolts.

5. Remove transmission and bellhousing. On M/T models, remove clutch cover, plate and flywheel. On A/T models, remove flexplate. Disconnect ground leads from engine. Disconnect

oil level sensor, knock sensor and oil and coolant temperature sensors electrical connectors.Remove engine mount stud nuts. Lower vehicle. Install lifting device, and remove engine from vehicle.

Installation (Corvette)

To install, reverse removal procedure. Fill cooling system. See WATER PUMP under REMOVAL &

INSTALLATION.



INTAKE MANIFOLD

Removal

1. Disconnect negative battery cable, and drain cooling system. Relieve fuel pressure. See FUEL PRESSURE RELEASE under REMOVAL & INSTALLATION. Remove air intake ductassembly and fuel rail covers. Disconnect throttle and cruise control cables. Mark and

disconnect necessary electrical connectors and vacuum hoses.

2. Remove heater hoses. Remove AIR diverter valve hoses. Disconnect fuel pressure regulator vacuum hose. Remove fuel injectors and fuel rail from intake manifold, and position aside.

3. Remove PCV valve and hose. Remove EGR solenoid bracket and EGR valve. Remove fuel vapor canister purge solenoid bracket and solenoid. Remove AIR pipe from intake manifold and right exhaust manifold.

4. Remove alternator brace. Remove throttle body and gasket. Remove intake manifold and gaskets.

Installation

Clean gasket surfaces. Apply 3/16" bead of RTV Sealer (1052289) onto front and rear of cylinder

block and 1/2" onto each cylinder head. Install gaskets and intake manifold. Tighten bolts and studs to specification in sequence. See Fig. 1. See TORQUE SPECIFICATIONS TABLE. To complete installation, reverse removal procedure. Adjust timing (if necessary) and check for leaks.



Fig. 1: Intake Manifold Tightening SequenceCourtesy of GENERAL MOTORS CORP.

EXHAUST MANIFOLD

Removal (Left)

1. Disconnect negative battery cable. Raise and support vehicle. Remove catalytic converter from exhaust manifold. Remove exhaust system from vehicle. Lower vehicle. Remove air intake duct. Remove serpentine belt. Remove left wheelwell center panel. Remove A/C compressor

and alternator and position aside.

2. Remove exhaust crossover pipe at exhaust manifold. Lower vehicle. Remove air cleaner.

Remove spark plug wires and clips. Remove AIR pipe and check valve as an assembly. Remove exhaust manifold heat shields, exhaust manifold and gasket.

Removal (Right)

1. Disconnect negative battery cable. Raise and support vehicle. Remove catalytic converter from exhaust manifold. Remove exhaust system from vehicle. Lower vehicle. Remove fuel rail

covers. Remove fuel injector electrical connectors. Remove fuel pressure regulator vacuum



hose. Remove fuel injectors and fuel rail from intake manifold.

2. Lower vehicle. Remove air cleaner. Remove Air Injection Reactor (AIR) hoses. Mark and disconnect spark plug wires at spark plugs. Remove necessary accessory brackets.

3. Remove oil indicator and tube. Remove exhaust manifold and gasket (if equipped).

Installation (Left & Right)

To install, reverse removal procedure. Tighten studs/bolts to specification. See TORQUE SPECIFICATIONS TABLE.

CYLINDER HEAD

Removal

1. Disconnect negative battery cable. Remove intake manifold, exhaust manifold and valvecovers. See INTAKE MANIFOLD, EXHAUST MANIFOLD and VALVE COVERS.

2. Remove serpentine belt. Drain cooling system. Remove rocker arms and push rods. Ensure components are kept in order for installation reference. Remove cylinder head bolts in 3 steps in reverse order of tightening sequence. See Fig. 2. Remove cylinder head and gasket.

Inspection

Clean carbon and gasket material from mating surfaces. Check cylinder head for warpage and cracks.

Clean cylinder head bolt holes and threads.

Installation

1. Coat steel-type head gaskets with sealer. DO NOT coat composition-type head gaskets withsealer. Install head gasket onto cylinder block. Install cylinder head. Coat head bolts with

Sealing Compound (1052080).

2. Tighten bolts to specification in 3 steps in sequence. See Fig. 2. To complete installation,

reverse removal procedure.

NOTE: Check and record compression before removing cylinder head. Remove cylinder head when engine is cold.



Fig. 2: Cylinder Head Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

FRONT COVER & OIL SEAL

Removal

1. Disconnect negative battery cable and serpentine drive belt. Remove crankshaft pulley. Loosen or remove motor mount nuts as necessary for harmonic balancer removal.

2. Remove harmonic balancer-to-crankshaft bolt. Mark position and remove harmonic balancer using Harmonic Balancer Remover/Installer (J-39046).

3. Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION. Remove water pump. See WATER PUMP under REMOVAL & INSTALLATION. Remove throttle body air duct

and distributor.

4. Remove front cover and gasket. Carefully pry seal from timing cover using a large screwdriver.



Installation

1. Using Seal Aligner/Installer (J-35468), install NEW oil seal in timing cover. Coat timing cover gasket with sealant, and position onto timing cover. Install timing cover.

2. Tighten bolts alternately and to specification. See TORQUE SPECIFICATIONS TABLE. Apply sealant to oil pan, cylinder block and timing cover joint. To complete installation,

reverse removal procedure.

TIMING CHAIN

Removal

1. Disconnect negative battery cable. Remove front cover. See FRONT COVER & OIL SEAL.Rotate crankshaft until camshaft sprocket and crankshaft sprocket timing marks line up with shaft centers. See Fig. 4.

2. Remove camshaft sprocket and chain as an assembly. See Fig. 3. If replacing crankshaft sprocket, use Sprocket Remover (J-5825-A) to pull sprocket off crankshaft. If replacing water pump drive gear, use Gear Remover (J-39243) to remove gear.

Installation

Drive crankshaft sprocket onto crankshaft, with timing mark facing out. Ensure timing marks on crankshaft sprocket and camshaft sprocket are as close together as possible and lined up with shaft centers. See Fig. 4. Install camshaft sprocket and chain as an assembly. To complete installation, reverse removal procedure.



Fig. 3: Viewing Timing Chain & Components




Fig. 4: Aligning Timing Marks


VALVE COVERS

Removal (Left)

Disconnect negative battery cable. Remove alternator brace. Remove alternator, and position aside. Disconnect AIR diverter valve hose from check valve. Remove fuel rail cover and studs, and position wiring harness aside. Remove fuel lines and brackets. Remove valve cover bolts, washers, valve cover and gasket.

Removal (Right)



1. Disconnect negative battery cable. Remove fuel rail cover and fuel rail bolts. Disconnect fuel pressure regulator vacuum hose. Remove fuel injectors and fuel rail from intake manifold. Remove fuel rail cover studs, and position wiring harness aside. Remove AIR pipe and check valve from intake and exhaust manifolds.

2. Disconnect ECM harness connectors and position harness aside. Remove AIR diverter valve

and hoses. Remove spark plug wires at distributor. Remove EGR solenoid bracket. Disconnect PCV hose and connector. Remove valve cover and gasket.

Installation (Left & Right)

To install, reverse removal procedure. Tighten bolts and nuts to specification. See TORQUE SPECIFICATIONS TABLE.

ROCKER ARMS & PUSH RODS

Removal & Installation

1. Remove valve covers. See VALVE COVERS. Keep components in order for installation inoriginal location and position.

2. Remove rocker arm nuts, balls, rocker arms and push rods. To install, reverse removal procedure. Apply Prelube (1052365) to rocker arm and ball mating surface. See VALVE CLEARANCE ADJUSTMENT under ADJUSTMENTS.

ROCKER ARM STUD


1. Remove rocker arms and push rods as necessary. See ROCKER ARMS & PUSH RODS under

REMOVAL & INSTALLATION. Remove rocker arm stud(s) using Stud Remover (J-5802-01). Ream stud bore to replacement size of oversize stud. Oversize studs are available in .003" (.08 mm) and .013" (.33 mm).

2. Coat press-fit area of stud with hypoid axle lubricant. Install rocker arm stud using Stud Installer (J-6880) until installer bottoms out on cylinder head. To complete installation, reverse removal procedure.

CAMSHAFT

Removal

1. Remove valve covers and rocker arms. DO NOT remove push rods. See VALVE COVERS and ROCKER ARMS & PUSH RODS. Measure lobe lift of camshaft with push rods installed.

NOTE: Rotate crankshaft in direction of normal operation only. Keep components in order for installation reference.



2. To measure lobe lift, attach dial indicator to cylinder head. Position indicator pointer onto tip of a push rod. Rotate crankshaft until push rod is at lowest point. Zero indicator, and rotate crankshaft until push rod is at highest point. Record reading, and repeat procedure for remaining lobes.

3. After lobe lift is measured, remove push rods. Remove intake manifold and timing sprockets.

See INTAKE MANIFOLD and TIMING CHAIN under REMOVAL & INSTALLATION.

4. Remove air cleaner, coolant reservoir hose from radiator and relay bracket from left side of radiator support. Remove AIR pump and hoses, and position aside. Disconnect cooling fan electrical connectors. Remove upper radiator support.

5. Remove upper radiator fan shroud. Remove radiator and hoses. Discharge A/C system and remove condenser (if equipped).

6. Remove valve lifters and camshaft retaining plate. Using three 5/16" x 18 tpi x 4" bolts as a handle, carefully pull camshaft from engine. Remove camshaft rear plug and bearings as necessary.

Inspection

Check camshaft for scratches, pits and loose fit in bearings. Check camshaft journal diameter and lobe lift (recorded earlier). See CAMSHAFT table under ENGINE SPECIFICATIONS. Replace camshaft if damaged or not to specification.

Installation

1. Install front and rear bearings. On Brougham, position camshaft bearing No. 1 oil holes at

equal distance from 6 o'clock position. On all other models, position camshaft bearing No. 1 oil holes at 1 o'clock and 5 o'clock positions.

2. Position oil hole of rear bearing at 12 o'clock position. Position oil holes of middle bearings at 5 o'clock position toward left side of engine and even with bottom of cylinder bore.

3. Install camshaft rear plug flush to .031" (.79 mm) deep in block. Use Sealant (1052080) on camshaft plug. If replacing camshaft, replace lifters, engine oil and filter.

4. Apply Camshaft Prelube (1052365) to camshaft lobes. Apply engine oil to bearings and camshaft bearing journals. To complete installation, reverse removal procedure.

CRANKSHAFT REAR OIL SEAL

Removal

Remove transmission. Remove flywheel/flexplate. Pry out seal using screwdriver at notches in seal retainer. See Fig. 5.

Installation

1. Coat entire seal with engine oil. Install seal using Seal Installer (J-35621) until installerbottoms. See Fig. 5. Align crankshaft dowel to flywheel hole.

2. Install flywheel/flexplate-to-crankshaft bolts. Tighten bolts to specification. See TORQUE



SPECIFICATIONS TABLE. To complete installation, reverse removal procedure.

Fig. 5: Removing & Installing Crankshaft Rear Seal


WATER PUMP

Removal



1. Disconnect negative battery cable, and drain cooling system. Remove air cleaner and intake duct assembly. Disconnect MAF sensor electrical connector. Disconnect intake air temperature, knock and coolant temperature sensor electrical connectors. Remove knock sensors. Remove coolant sensor wire harness retainer from the front of the water pump.

2. Relieve tension on drive belt and remove belt from alternator. Remove coolant hoses from

water pump. Remove heater hose from water pump. Remove water pump bolts, water pump and gasket.

Installation

To install, reverse removal procedure. Install new gaskets with tabs facing up. Fill and bleed cooling system. To bleed system, open bleed valves on thermostat housing and throttle body. Fill cooling

system through radiator surge tank until a solid stream of coolant comes out of bleeds. Close bleeds and fill surge tank until level is at base of surge tank neck. Install radiator cap and check level of coolant in recovery reservoir. Start engine and check for leaks.

Fig. 6: Water Pump Assembly


OIL PAN

Removal



1. Disconnect negative battery cable. Raise vehicle, and drain crankcase. Disconnect oil level sensor electrical connector, and remove sensor. Remove oil filter. Remove oil filter adapter at block. Remove starter. On A/T models, remove flexplate cover.

2. Remove left catalytic converter. Remove oil cooler pipe at oil pan. Remove knock sensor shield. Remove oil pan and gasket.

Installation

To install, reverse removal procedure. Apply Sealant (1052914) to front cover, cylinder block, rear seal retainer and cylinder block junction. Install NEW oil pan gasket. Tighten bolts and nuts tospecification. See TORQUE SPECIFICATIONS TABLE.

OVERHAUL

CYLINDER HEAD

Valve Guides

Check and service guides before servicing valve and seat. Guide replacement information is not available from manufacturer. Valve guides may be reamed for installation of .003" (.08 mm),.015" (.38 mm) or .030" (.76 mm) oversize valves.

Valve Seat

Valve seat replacement information is not available from manufacturer. Follow instructions of tool manufacturer for servicing valve seats. If seats are serviced, service or replace valves.

Valves

Check valves before servicing. Replace valves as necessary. See VALVES & VALVE SPRINGS

table under ENGINE SPECIFICATIONS. Valves may be refaced.

Valve Seat Correction Angles

If seat is too wide after grinding, use a 20-degree stone to lower or a 70-degree stone to raise seat.

CYLINDER BLOCK ASSEMBLY

Piston & Rod Assembly

1. Mark rod and rod cap with matching cylinder number. Before disassembling, mark piston to

NOTE: Mark components to ensure installation in original location andposition.



rod for reassembly reference. Notch or dot on piston top should face front of engine. Piston pin

is a press fit.

2. When measuring, ensure pin bore and piston pin are free of varnish and scuffing. If piston-to-pin clearance exceeds .001" (.03 mm), replace piston and pin as an assembly.

Fitting Pistons

Ensure notch or dot on piston top faces front of engine. Check pistons for wear and damage. Replace pistons as necessary. Check piston-to-cylinder bore clearance. If one cylinder needs to be bored, bore all cylinders to same oversize.

Piston Rings

Install marked side of ring toward top of piston. Top compression ring is chrome or molybdenum faced. Second compression ring has a tapered face. Oil ring is a 3-piece type. Ensure end gaps are evenly spaced on piston. See Fig. 7.

Fig. 7: Positioning Piston Ring End Gaps


Rod Bearings

Ensure bearing cap bolt holes and mating surfaces are clean and dry. Use connecting rod stud protectors on rod cap bolts. Install inserts in connecting rod and cap. Lubricate bearings and crank

NOTE: Rod and main bearings are available in .001" (.03 mm) and .002" (.05) undersize for oil clearance adjustment.



pin. Install bearing cap. Tighten rod bearing cap bolts to specification. See TORQUE

SPECIFICATIONS TABLE.

Crankshaft & Main Bearings

1. If bearing clearance is greater than specification, replace with undersized bearings. SeeCRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINESPECIFICATIONS. Recheck bearing clearance using Plastigage.

2. Tighten main bearing caps finger tight. Pry crankshaft rearward and then forward to align rear main bearing thrust surfaces. Retighten main bearing caps to specification. See TORQUE

SPECIFICATIONS TABLE.

Thrust Bearing

Check crankshaft end play by forcing crankshaft to extreme forward position. Measure end play at front of rear main bearing using a feeler gauge. If end play is not within specification, replace thrust bearing and/or crankshaft. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table

under ENGINE SPECIFICATIONS.

Cylinder Block

Check cylinder bore for wear, taper, out-of-round and piston fit. See CYLINDER BLOCK table under ENGINE SPECIFICATIONS. Cylinders with less than .005" (.13 mm) wear or taper can behoned. Cylinders with more than .005" (.13 mm) wear or taper should be bored to smallest oversize

piston which will permit complete resurfacing of all cylinders.

LUBRICATION

ENGINE OILING SYSTEM

Description

A gear-type oil pump provides pressurized lubrication through the full-flow oil filter. Oil pump is bolted to bottom of cylinder block, inside oil pan. Oil pump is driven (through intermediate shaft) by gear located at rear of camshaft.

Crankcase Capacity

Crankcase capacity is 4 qts. (3.8L) without oil filter change or 4.5 qts. (4.3L) with oil filter change.

Oil Pressure

With engine at normal operating temperature, oil pressure should be at least 6 psi (0.4 kg/cm2 ) at

1000 RPM, 18 psi (1.3 kg/cm2 ) at 2000 RPM and 24 psi (1.7 kg/cm2 ) at 4000 RPM.



OIL PUMP

Removal & Disassembly

1. Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION. Remove oil pan baffle (if equipped). Remove oil pump assembly and intermediate shaft.

2. Remove oil pump cover screws, and remove cover. Mark gear teeth for reassembly reference.Remove gears. Remove pressure regulator pin, spring and valve from cover. Remove pick-up

screen and pipe from cover only if replacing.

Inspection

Check oil pump body and gears for cracks, wear and damage. Check oil pump shaft for looseness in housing. Check inside of cover for wear or oil leakage. If excess wear or damage is found, replace oil pump as an assembly. Oil pump specifications are not available from manufacturer.


Clean parts in solvent. Dry parts using compressed air. To assemble, reverse disassembly procedure. To install, reverse removal procedure.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Application Ft. Lbs. (N.m)

Camshaft Sprocket Bolt 21 (28)

Connecting Rod Cap Nut 47 (64)

Crankshaft Pulley Bolt 60 (81)

Cylinder Head Bolt (1) 65 (88)

Exhaust Manifold Bolt/Stud/Screw 26 (35)

Flexplate/Flywheel-To-Crankshaft Bolt (2) 74 (100)

Harmonic Balancer (Damper) Bolt 60 (81)

Intake Manifold (3)

Main Bearing Cap Bolt 78 (106)

Oil Pan Baffle Nut 25 (34)

Oil Pan Corner Bolt/Nut 15 (20)

Oil Pump Bolt 65 (88)

Torque Converter-To-Flexplate Bolt 46 (62)

Water Pump Pulley Bolt 22 (30)

Water Pump-To-Block Bolt 30 (41)

INCH Lbs. (N.m)

Front Cover Bolt 97 (11)

Oil Pan Bolt & Nut (Except Corners) 97 (11)



ENGINE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECS

Valve Cover Bolt 97 (11)

(1) Tighten in sequence (in 3 passes). See Fig. 2.

(2) Tighten bolts evenly using a crisscross sequence.

(3) Tighten bolts/studs in sequence to specification in 2 steps. See Fig. 1. On first sequence, tighten bolts/studs to 71 INCH lbs. (8 N.m). On second sequence, tighten bolts/studs to 35 Ft. lbs. (48 N.m).

Application In. (mm)

Displacement 350 Cu. In. (5.7L)

Bore 4.00" (101.6 mm)

Stroke 3.48" (88.4 mm)

Compression Ratio 10.5:1

Fuel System PFI

Horsepower @ RPM

Corvette 300 @ 5000

Camaro & Firebird 275 @ 5000

Torque Ft. Lbs. @ RPM

Corvette 340 @ 3600

Camaro & Firebird 325 @ 2400


Crankshaft

End Play .001-.007 (.03-.17)

Runout (Maximum At Rear Flange) .0015 (.038)

Main Bearings

Journal Diameter 2.4485-2.4491 (62.191-62.207)

Journal Out-Of-Round (Maximum) .001 (.03)

Journal Taper (Maximum) .001 (.03)

Oil Clearance

Journal No. 1 .0008-.0020 (.020-.051)

Journals No. 2, 3 & 4 .0011-.0020 (.028-.051)

Journal No. 5 .0017-.0032 (.043-.084)

Connecting Rod Bearings




CONNECTING RODS SPECIFICATIONS

CONNECTING RODS SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

Journal Out-Of-Round (Maximum) .001 (.03)

Journal Taper (Maximum) .001 (.03)

Oil Clearance .0013-.0035 (.033-.088)


Maximum Bend (1)

Maximum Twist (1)

Side Play .006-.014 (.16-.35)

(1) Replace rod if any bend or twist exists.


Piston Clearance .0010-.0027 (.025-.068)

Pins

Diameter .9270-.9271 (23.546-23.548)

Piston Fit .0004-.0008 (.0102-.0203)

Rod Fit (Press) .0008-.0016 (.021-.040)

Rings

No. 1

End Gap .010-.020 (.25-.50)

Side Clearance .0012-.0029 (.030-.073)

No. 2

End Gap .018-.026 (.46-.66)

Side Clearance .0012-.0032 (.029-.073)

No. 3 (Oil)

End Gap .010-.030 (.25-.76)

Side Clearance .002-.007 (.051-.17)


Cylinder Bore

Diameter 4.000 (101.60)

Maximum Taper .001 (.03)

Maximum Out-Of-Round .002 (.05)



VALVES & VALVE SPRINGS SPECIFICATIONS

VALVES & VALVE SPRINGS SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

© 2008 Mitchell Repair Information Co., LLC.

Application Specification

Valves

Face Angle 45°

Minimum Margin .031" (.80 mm)

Valve Springs

Free Length 2.02 (51.3)

Installed Height 1.70" (43.2 mm)

Pressure (1)

Valve Closed 76-84 @ 1.70 (34-37 @ 43.2)

Valve Open 187-203 @ 1.27 (83-90 @ 32.3)

(1) Lbs. @ In. (Kg @ mm).

Application Specification

Valve Seats

Intake

Seat Angle 46°

Seat Width .040-.065" (1.02-1.65 mm)

Exhaust

Seat Angle 46°

Seat Width .065-.098" (1.65-2.49 mm)

Valve Stem-To-Guide Oil

Clearance .0009-.0027" (.028-.069 mm)


End Play .004-.011 (.10-.30)


Lobe Lift

Exhaust .280 (7.26)

Intake .279 (7.09)



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