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SECTION : 2C

FRONT SUSPENSION

TABLE OF CONTENTSSPECIFICATIONS 2C–1. . . . . . . . . . . . . . . . . . . . . . . . . .

General Specifications 2C–1. . . . . . . . . . . . . . . . . . . . .

Fastener Tightening Specifications 2C–1. . . . . . . . . . .

SPECIAL TOOLS 2C–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Tools Table 2C–2. . . . . . . . . . . . . . . . . . . . . . . .

DIAGNOSIS 2C–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strut Dampener 2C–4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Ball Joint and Knuckle 2C–4. . . . . . . . . . . . . . . . . . . . .

Excessive Friction Check 2C–5. . . . . . . . . . . . . . . . . . .

COMPONENT LOCATOR 2C–6. . . . . . . . . . . . . . . . . . . .

Front Suspension 2C–6. . . . . . . . . . . . . . . . . . . . . . . . .

MAINTENANCE AND REPAIR 2C–8. . . . . . . . . . . . . . .

ON–VEHICLE SERVICE 2C–8. . . . . . . . . . . . . . . . . . . . .

Stabilizer Shaft Link 2C–8. . . . . . . . . . . . . . . . . . . . . . . .

Strut Assembly 2C–9. . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Arm 2C–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Steering Knuckle 2C–13. . . . . . . . . . . . . . . . . . . . . . . . .

Crossmember Assembly 2C–14. . . . . . . . . . . . . . . . . .

Stabilizer Bar 2C–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .

UNIT REPAIR 2C–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ball Joint 2C–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hub and Bearing 2C–18. . . . . . . . . . . . . . . . . . . . . . . . .Control Arm Bushings 2C–20. . . . . . . . . . . . . . . . . . . .

Front Strut Assembly 2C–21. . . . . . . . . . . . . . . . . . . . . .

GENERAL DESCRIPTION AND SYSTEMOPERATION 2C–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Suspension 2C–23. . . . . . . . . . . . . . . . . . . . . . . . .

SPECIFICATIONS

GENERAL SPECIFICATIONS

Application Trim Height

Center of Front Wheel to Bottom of Front Wheel Well 344 mm (13.5 in.)

Center of Rear Wheel to Bottom of Rear Wheel Well 343 mm (13.5 in.)

FASTENER TIGHTENING SPECIFICATIONS

Application Nm Lb–Ft Lb–In

Ball Joint–to–Control Arm Nuts 50 37 444

Ball Joint–to–Knuckle/Strut Nut 55 41 487

Control Arm Front Mounting Bolts 110 81 972

Drive Axle–to–Hub Caulking Nut 300 221 2655

Piston Rod Nut 60 44 531

Stabilizer Shaft–to–Iink nut 50 37 –

Strut Assembly–to–Body Nuts 60 44 531

Strut Cartridge Closure Nut 200 148 1776

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2C – 2IFRONT SUSPENSION

DAEWOO V–121 BL4

SPECIAL TOOLS

SPECIAL TOOLS TABLE

500–20Hex Nut

J–36661–2

Forcing Screw

J–37105–B–1Support Bridge

J–37105–B–2Bearing Adapter

J–37105–B–3Hub Adapter

KM–158

Remover/Installer

KM–307–BRemoval Plate

KM–329–ASpring Compressor

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FRONT SUSPENSION 2C – 3

DAEWOO V–121 BL4

J–42468Front Strut Mount

Nut Wrench

KM–465–AFront SpringCompressor

KM–507–BBall Joint Remover

KM–508–ARemover/Installer

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DIAGNOSIS

STRUT DAMPENERA strut dampener is basically a shock absorber. However, strut dampeners are easier to extend and retract by hand thanare shock absorbers. Strut dampeners are used only on the front in most vehicles, including this vehicle. Shock absorbersare used on the rear wheels.

Struts Seem Weak

Checks Action

Check the tire pressures. Adjust the tire pressures to the specifications on the tireplacard.

Check the load conditions under which the vehicle is nor-mally driven.

Consult with the owner to confirm the owners understand-ing of normal load conditions.

Check the compression and rebound effectiveness of thestrut dampener.

Quickly push down and then lift up on the corner of thebumper nearest the strut dampener being tested.Compare the compression and rebound with those of asimilar vehicle that has an acceptable ride quality.Replace the strut dampener, if needed.

Struts Are Noisy

Checks Action

Check the mountings for looseness or damage. Tighten the strut dampener. Replace the strut dampener,if needed.

Check the compression and rebound effectiveness of thestrut dampener.

Quickly push down and then lift up on the corner of thebumper nearest the strut dampener being tested.Compare the compression and rebound with those of asimilar vehicle that has an acceptable ride quality.Replace the strut dampener, if needed.

Leaks

Checks Action

Check for a slight trace of fluid. The strut dampener is OK.

Check the seal cover on the fully extended strut. Replace the strut dampener.

Check for an excessive amount of fluid on the strut damp-ener.

Replace the strut dampener.

BALL JOINT AND KNUCKLE

Ball Joint Inspection

1. Raise the front of the vehicle to allow the front sus-pension to hang free.

2. Grasp the tire at the top and the bottom.3. Move the top of the tire in an in–and–out motion.4. Look for any horizontal movement of the knuckle

relative to the control arm.

5. Ball joints must be replaced under the followingconditions:

The joint is loose. The ball seal is cut. The ball stud is disconnected from the knuckle.

The ball stud is loose at the knuckle. The ball stud can be twisted in its socket with

finger pressure.

Ball Stud InspectionMake sure to check the tightness of the ball stud in theknuckle boss during each inspection of the ball joint. Oneway to inspect the ball stud for wear is to shake the wheeland feel for movement of the stud end or the castellatednut at the knuckle boss.

Another way to inspect the ball stud for wear is to checkthe fastener torque at the castellated nut. A loose nut canindicate a stressed stud or a hole in the knuckle boss.

Worn or damaged ball joints and knuckles must be re-placed.

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EXCESSIVE FRICTION CHECKUse the following procedure to check for excessive frictionin the front suspension:

1. Enlist the help of another technician to lift up on thefront bumper, raising the vehicle as high as pos-sible.

2. Slowly release the bumper, allowing the vehicle toassume its normal trim height. See ”General Speci-

fications” in this section.

3. Measure the distance from the street level to thecenter of the bumper.

4. Push down on the bumper, release slowly, and al-low the vehicle to assume its normal trim height.

5. Measure the distance from the street level to thecenter of the bumper.

6. The difference between the two measurementsshould be less than 12.7 mm (0.5 inch). If the differ-ence exceeds this limit, inspect the control arms,

the struts, and the ball joints for damage or wear.

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DAEWOO V–121 BL4

COMPONENT LOCATOR

FRONT SUSPENSION

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DAEWOO V–121 BL4

1. Stabilizer bar2. Stabilizer link nut3. Stabilizer link4. Crossmember5. Crossmember nut (front direction)6. Control arm connecting bolt7. Stabilizer bar nut8. Control arm9. Ball joint connecting bolt

10. Ball joint11. Piston rod nut12. Washer13. Strut upper nut14. Strut mount15. Bearing

16. Spring upper seat17. Spring upper insulator18. Hallow bumper19. Coil spring20. Thrust21. Thrust bracket bolt22. Steering knuckle23. Cover seat24. Wheel bearing

25. Retaining ring26. Wheel hub27. Brake disc28. Washer29. Caulking nut

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DAEWOO V–121 BL4

MAINTENANCE AND REPAIR

ON–VEHICLE SERVICE

STABILIZER SHAFT LINK

Removal Procedure

1. Lift and suitably support the vehicle, allowing thefront suspension to hang free.

2. Remove the front wheel. Refer to Section 2E, Tires and Wheels.

3. Remove the stabilizer shaft–to–knuckle nut and theshaft–to–link nut.

4. Disconnect the stabilizer shaft from the knucle byremoving the stabilizer shaft link assembly.

Installation Procedure

1. Install the stabilizer shaft into the vehicle.2. Install the stabilizer shaft–to–knuckle nut and the

shaft–to–link nut.

TightenTighten the stabilizer shaft link nuts to 50 Nm (37 lb–

ft).

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STRUT ASSEMBLYTools Required

KM–507–B Ball Joint Remover

Removal Procedure

1. Loosen the strut assembly –to–body nut that attachthe top of the strut assembly to the vehicle.

2. Raise and suitably support the vehicle.3. Place the jackstands under the frame of the ve-

hicle.4. Lower the vehicle slightly so the weight of the ve-

hicle rests on the jackstands and not on the control

arms.5. Remove the wheel. Refer to Section 2E, Tires and

Wheels.6. Disconnect the brake caliper from the knuckle/strut

assembly and support the caliper. Do not hang thecaliper from the hydraulic brake hose. Refer to Sec- tion 4D, Front Disc Brakes.

7. Disconnect the ABS speed sensor electrical con-nector, if applicable.

8. Remove the ball joint–to–knuckle–strut nut.

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DAEWOO V–121 BL4

Notice : Failure to use the recommended tool for separat-ing the ball joint from the steering knuckle assembly maydamage the ball joint and seal.

9. Separate the steering knuckle assembly from theball joint using the ball joint remover KM–507–B.

10. Remove the outer tie rod from the steering knuckleassembly. Refer to Section 6C, Power Steering Gear [Includes Rack & Pinion Gear] or Section 6D,Manual Steering Gear [Includes Rack & Pinion

Gear].Notice : Take care to prevent the axle joints from beingoverextended. When either end of the shaft is discon-nected, the joint can become overextended. This overex-tension can cause the internal components to separate.This separation can cause joint failure. Use drive axle jointseal protectors during any service on or near the driveaxles. Failure to use joint seal protectors can damage the

interior joint seal and cause joint failure.

11. Push the drive axle shaft from the front wheel hub.12. Support the drive axle.13. Lower the vehicle in order to gain access to the

strut–to–body nuts and the washers.

Notice : Chipping or scratching the spring coating whenhandling the front suspension coil spring can cause thespring to fail.

14. Remove the strut assembly–to–body nuts.15. Remove the strut assembly from the vehicle.


Notice : Chipping or scratching the spring coating when

handling the front suspension coil spring can cause thespring to fail.

1. nstall the strut assembly into the vehicle with thestrut assembly–to–body nuts.

TightenTighten the strut assembly–to–body nut to 60 Nm(44 lb–ft).

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DAEWOO V–121 BL4

2. Connect the drive axle to the front wheel hub.

3. Connect the outer tie rod to the steering knuckleassembly. Refer toSection 6C, Power Steering Gear [Includes Rack & Pinion Gear] or Section 6D,Manual Steering Gear [Includes Rack & Pinion Gear].

4. Connect the ball joint to the steering knuckle as-sembly.

5. Install the ball joint–to–knuckle/strut nut.

TightenTighten the ball joint–to–knuckle/strut nut to 55 Nm(41 lb–ft).

6. Connect the ABS speed sensor electrical connec-tor, if applicable.

7. Connect the brake caliper to the knuckle/strut as-sembly. Refer to Section 4D, Front Disc Brakes.

8. Install the wheel. Refer to Section 2E, Tires and Wheels.9. Install a new drive axle–to–hub caulking nut.

TightenTighten the drive axle–to–hub caulking nut to 300Nm (221 lb–ft).

10. Crimp the caulking nut sleeve onto the drive axleshaft.

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DAEWOO V–121 BL4

CONTROL ARMTools Required

KM–507–B Ball Joint Remover

Removal Procedure

1. Raise and suitably support the vehicle.2. Place the jackstands under the frame of the ve-

hicle.3. Lower the vehicle slightly so the weight of the ve-

hicle rests on the jackstands and not on the controlarms.

4. Remove the wheel. Refer to Section 2E, Tires and Wheels.

5. Disconnect the stabilizer shaft from the control armby removing the control armlink bolt assembly.Referto ”Stabilizer Shaft and Insulators” in this section.

6. Remove the retaining clip and the ball joint–to–knuckle/strut nut from the ball joint.

7. Disconnect the ball joint from the steering knuckleusing the ball joint remover KM–507–B.

8. Remove the control arm front mounting bolt.9. Remove the control arm rear mounting bolts and

the bracket.10. Remove the control arm from the vehicle.


1. Install the control arm onto the vehicle.2. Connect the front of the control arm to the body of

the vehicle with the front mounting bolt and thewasher.

3. Apply a thread sealer to the control arm rearmounting bolts.

4. Connect the rear of the control arm to the body ofthe vehicle with the rear mounting bracket and

bolts.Important : Do not tighten the control arm bolts at thispoint.

Notice : Use a new self–locking nut to install the controlarm link bolt assembly. Failure to do so will allow the nor-mal vibration of the vehicle to loosen the nut and damage

the vehicle.

5. Install the stabilizer shaft link bolt assembly. Referto ”Stabilizer Shaft and Insulators” in this section.

6. Connect the ball joint to the steering knuckle.7. Tighten the ball joint–to–knuckle/strut nut.

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DAEWOO V–121 BL4

TightenTighten the ball joint–to–knuckle/strut nut to 55 Nm(41 lb–ft).

8. Connect the retaining clip to the ball joint stud.9. Install the wheel. Refer to Section 2E, Tires and

Wheels.10. Raise the vehicle.11. Place the jackstands under the control arms.12. Lower the vehicle.

Important : The control arms must support the weight ofthe vehicle while the control arm mounting bolts are beingtightened.

13. Tighten the control arm rear mounting bolts.

TightenTighten the control arm rear mounting bolts to 110Nm (81lb–ft).

14. Tighten the control arm front mounting bolt.

TightenTighten the control arm front mounting bolt to 110 Nm(81 lb–ft).

15. Raise the vehicle.16. Remove the jackstands.17. Lower the vehicle.

STEERING KNUCKLE

Removal Procedure

1. Remove the front wheels.Refer to Section 2E, Tires and Wheels.

2. Remove the caulking nut.3. Remove the tie rod end from the knuckle.4. Remove the control arm ball joint.5. Remove the brake caliper.6. Remove the brake disk.Refer to Section 4E, Front

Disk Brakes.

7. Remove the ABS wheel speed sensor, if equippedRefer to Section 4F, ABS from the knuckle.

8. Remove the backing plate.9. Remove the front strut bolts.10. Remove the knuckle assembly.

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DAEWOO V–121 BL4


1. Install the knuckle assembly to the front strut withbolt and nuts.

TightenTighten the knuckle assembly to the front strut withbolt and nuts to 100 Nm (74lb–ft).

2. Install the backing plate with the screws.

TightenTighten the backing plate with the screws to 4 Nm(3lb–ft).

3. Install the ABS wheel speed sensor.4. Install the brake disk and caliper.Refer to Section

4D, Front Disk Brakes.5. Install the control arm ball joint.Refer to this Sec-

tion, Unit Repair 6. Install the tie rod end to the knucke. Refer to this

Section.

CROSSMEMBER ASSEMBLY

Removal Procedure

1. Remove the front wheels.2. Remove the control arm ball joint and stabilizer

shaft link nut (lower). Refer to this Section.3. Remove the tie rod end ball joint. Refer to this Sec-

tion.

4. Remove the engine mounting reaction rod bolts.

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DAEWOO V–121 BL4

5. Drain the power steering fluid.6. Remove the power steering pipe fittings.7. Remove the interm shaft lower joint.

CAUTION : When the engine is hot, do not remove the above parts from the vehicle otherwise, personal in-

jury can be caused by hot components of the vehicle.

8. Remove the crossmember assembly.

CAUTION : To avoid personal injury or vehicle damage, the crossmember should be supported by jack- stand prior to the removal.

9. Remove the stabilizer bar, power steering gear setand control arm from the crossmember.


1. Install the stabilizer bar, power steering gearset andcontrol arm from the crossmember.

2. Install the crossmember assembly front to body nutand the crossmember assembly rear to body bolt.

TightenTighten the crossmember assembly front to body nutand rear to body bolt to 150 Nm (111 lb–ft).

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DAEWOO V–121 BL4

3. Connect the interm shaft lower joint and powersteering pipe fittings.

TightenTighten the power steering pipe fittings to 22 Nm (16lb–ft).

4. Fill the fluid reservoir with the power steering fluid.5. Inspect for leaks. If there are leaks, correct the

cause of the leaks and bleed the system. Refer

toSection 6A, Bleeding the Power Steering System.

6. Install the engine mounting reaction rod bolts.

TightenTighten the engine mounting reaction rod bolts to 60Nm (44 lb–ft).

7. Install the tie rod end ball joint nut.

TightenTighten the tie rod end ball joint nut to 45 Nm (33 lb–ft).

8. Install the control arm ball joint and stabilizer shaftlink nut (lower). Refer to this Section.

STABILIZER BAR

Removal Procedure1. Remove the crossmember assmbly. Refer to this

Section 2. Remove the stabilizer bar from the crossmember

assembly by unscrewing the u–clamp bolts.

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DAEWOO V–121 BL4

Installation Procedure1. Install the u–clamp bolts to the stabilizer bar.

TightenTighten the u–clamp bolts to the stabilizer bar to 25Nm (18 lb–ft).

2. Remove the crossmember assmbly. Refer to this Section

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DAEWOO V–121 BL4

UNIT REPAIR

BALL JOINT

Disassembly Procedure1. Raise and suitably support the vehicle.2. Place the jackstands under the frame of the vehicle

and lower the vehicle slightly so the weight of thevehicle rests on the jackstands and not on the con-

trol arms.3. Remove the wheel. Refer to Section 2E, Tires and

Wheels.4. Remove the control arm. Refer to ”Control Arm” in

this section.5. Remove the ball joint mounting bolts.

Assembly Procedure1. Connect the ball joint to the control arm with the

mounting bolts.2. Install the nuts to secure the bolts from below the

control arm.TightenTighten the ball joint–to–control arm nuts to 64 Nm(47 lb–ft).

3. Install the control arm. Refer to ”Control Arm” in thissection.

HUB AND BEARING

Tools Required

500–20 Hex NutJ–36661–2 Forcing ScrewJ–37105–B–1 Support BridgeJ–37105–B–2 Bearing AdapterJ–37105–B–3 Hub Adapter

Disassembly Procedure

1. Remove the drive axle from the front wheel hub.Refer to ”Strut Assembly” in this section.

2. Remove the wheel hub with the support bridgeJ–37105–B–1, the hub adapter J–37105–B–3, thehex nut 500–20, and the forcing screw J–36661–2.

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DAEWOO V–121 BL4

3. Remove the brake shield. Refer to Section 4D,Front Disc Brakes.

4. Remove the outer snap ring.

5. Remove the wheel bearing with the support bridgeJ–37105–B–1, the bearing adapter J–37105–B–2,the hex nut 500–20, and the forcing screwJ–36661–2.

6. Clean the bore of the knuckle.

Assembly Procedure

1. Install the outer snap ring and push the wheel bear-ing into place with the support bridge

J–37105–B–1, the bearing adapter J–37105–B–2,the hex nut 500–20, and the forcing screwJ–36661–2.

2. Install the brake shield. Refer to Section 4D, Front Disc Brakes.

3. Push the wheel hub into place with the hub adapterJ–37105–B–3, the bearing adapter J–37105–B–2,the hex nut 500–20, and the forcing screw

J–36661–2.4. Install the drive axle into the front wheel hub. Refer

to ”Strut Assembly” in this section.

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DAEWOO V–121 BL4

CONTROL ARM BUSHINGSTools Required

KM–508–A Remover/InstallerKM–158 Remover/InstallerKM–307–B Removal Plate


1. Remove the control arm. Refer to ”Control Arm” in

this section.2. Press off the rear bushing using a press, the re-

mover/installer KM–158, and the removal plateKM–307–B.

3. Press out the front bushing using the remover/in-staller KM–508–A, and the remover/installerKM–158.

Assembly Procedure

1. Coat the control arm rear shaft with a multipurposelubricant. Refer to Section 0B, General Information.

2. Press the rear bushing onto the shaft. The flat of

the bushing must be on the top side, the same asthe ball joint. Use the remover/installer KM–508–Ato support the control arm.

3. Coat the outside of the front bushing and the insideof the lower control arm with a multipurpose lubri-

cant. Refer to Section 0B, General Information.4. Press the new bushing into the control arm from theback to the front, using the remover/installerKM–508–A.

5. Center the bushing.6. Install the control arm. Refer to ”Control Arm” in this

section.

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DAEWOO V–121 BL4

FRONT STRUT ASSEMBLYTools Required

KM–329–A Spring CompressorJ–42468 Front Strut Mount Nut Wrench


1. Remove the strut assembly. Refer to ”Strut Assem-

bly” in this section.2. Fasten the strut assembly to the spring compressor

KM–329–A. Make sure the hooks are seated on the

strut spring properly.3. Compress the front spring with the front spring

compressor KM–329–A.

4. Use an open end wrench to hold the threaded pis-ton rod while removing the piston rod nut withJ–42468 front strut mount nut wrench.

5. Remove the strut mount, strut bearing, spring upperseat, spring upper insulator, hallow bumper, coil

spring and strut step by step.

Important : Record the position of the front spring seat rel-

ative to the strut assembly–to–knuckle bracket. Place thefront spring locator back in the same position during as-sembly.

Assembly Procedure

1. Install the lower spring insulator and the spring.2. Comopress the spring using the spring compressor

KM–329–A.3. Install the strut mount, strut bearing spring upper

seat, spring upper insulator, hallow bumper, coilspring and strut step by step.

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DAEWOO V–121 BL4

4. Use an open end wrench to hold the threaded pis-ton rod while installing the piston rod nut withJ–42468 front strut mount nut wrench.

TightenTighten the piston rod nut to 60 Nm (44 lb–ft).

Important : Locate the coil spring to the original positionon th coil spring seat. Check the installation condition ofthe coil spring.

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GENERAL DESCRIPTIONAND SYSTEM OPERATION

FRONT SUSPENSIONThe front suspension for this vehicle is a combinationknuckle/strut and spring design.

The control arms pivot from the body. The lower controlarm pivots use rubber bushings. The upper end of the strutis isolated by a rubber mount and contains a bearing to al-low the wheel to turn.

The lower end of the steering knuckle pivots on a ball jointbolted to the control arm. The ball joint is fastened to thesteering knuckle with a nut, and to the lower control armwith rivets.

When servicing the control arm–to–body attachment andthe stabilizer shaft–to–body insulators, make sure the at-

taching bolts are loose until the control arms are moved tothe trim height, which is curb height. Trim height is the nor-

mal position to which the control arms move when the ve-hicle is sitting on the ground. Refer to ”General Specifica-tions” in this section.

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