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Home >> Lexus >> 2007 >> GS 350 AWD V6-3.5L (2GR-FSE) >> Repair and Diagnosis >> Steering and Suspension >> Suspension >> Suspension Strut / Shock Absorber >> Service and Repair >> Front Shock Absorber

Front Shock Absorber

FRONT SHOCK ABSORBER (for 4WD)

COMPONENTS (Part 1):




COMPONENTS (Part 2):





REMOVAL
1. REMOVE FRONT WHEEL





2. REMOVE ENGINE ROOM SIDE COVER
(a) Disengage the 4 clips and remove the engine room side cover.





3. SEPARATE SPEED SENSOR FRONT
(a) Remove the bolt and separate the speed sensor front from the front shock absorber with coil spring.

NOTICE:
Be careful not to deform the bracket of the front shock absorber with coil spring when removing the bolt.





4. SEPARATE HEIGHT CONTROL SENSOR LINK SUB-ASSEMBLY FRONT
(a) Remove the nut and separate the height control sensor link sub-assembly front.





5. SEPARATE FRONT SUSPENSION UPPER ARM
(a) Remove the clip and castle nut.





(b) Using SST, remove the upper ball joint from the steering knuckle.
SST 09628-00011

NOTICE:
^ Use wire or something similar to suspend the steering knuckle and prevent it from hanging down by the flexible hose.
^ Do not damage the ball joint dust cover or steering knuckle.
^ Securely set the SST on the spacer of the steering knuckle.
^ If the spacer of the steering knuckle comes off, replace the steering knuckle with a new one.

6. SEPARATE TIE ROD ASSEMBLY





7. REMOVE FRONT SHOCK ABSORBER WITH COIL SPRING
(a) Support the front suspension lower arm with a jack.

NOTICE:
Be sure to place a wooden block between the jack and the front suspension lower arm to avoid damage.

(b) Remove the nut and front shock absorber upper bracket plate.

NOTICE:
Insert the front shock absorber bracket lower to secure the front shock absorber with coil spring.





(c) Loosen the lock nut of the front shock absorber.

NOTICE:
^ Do not remove the lock nut.
^ Loosen the lock nut only when disassembling the front shock absorber with coil spring.





(d) Remove the 3 nuts from the upper side of the front suspension support.
(e) Slowly lower the jack.
(f) Remove the bolt from the lower side to remove the front shock absorber with coil spring.

DISASSEMBLY





1. REMOVE FRONT SHOCK ABSORBER
(a) Install the SST to the front coil spring so that the 2 hooks on the SST are fully extended.
(b) Fully compress the front coil spring with the SST.
SST 09727-30021 (09727-00010, 09727-00021, 09727-00031)

NOTICE:
Do not use an impact wrench. It will damage the SST.

HINT:
The front coil spring can also be installed/removed using the hydraulic spring compressor.

(c) Remove the lock nut.
(d) Remove the front suspension support sub-assembly with front coil spring insulator upper.
(1) Remove the front coil spring insulator upper from the front suspension support sub-assembly.
(2) Remove the front spring bumper from the front suspension support sub-assembly.
(e) Remove the front coil spring and SST.

NOTICE:
Do not use an impact wrench. It will damage the SST.

(f) Remove the front coil spring insulator lower.





(g) Remove the bolt from the front shock absorber bracket lower.

INSPECTION





1. INSPECT FRONT SHOCK ABSORBER
(a) Compress and extend the front shock absorber rod 4 or more times. Check that there is no abnormal resistance or sound.
If there is any abnormality, replace the front shock absorber with a new one.

NOTICE:
When disposing of the front shock absorber, see DISPOSAL.

REASSEMBLY





1. INSTALL FRONT SHOCK ABSORBER
(a) Install the front shock absorber bracket lower with bolt.
Torque: 48 N*m (490 kgf*cm, 35 ft.*lbf)





(b) Install the front coil spring insulator lower to the front shock absorber so that both of the recessed parts are aligned.





(c) Using SST, compress the front coil spring.
SST 09727-30021 (09727-00010, 09727-00021, 09727-00031)

NOTICE:
Do not use an impact wrench. It will damage the SST.

HINT:
The front coil spring can also be installed/removed using the hydraulic spring compressor.





(d) Install the front coil spring so that the end comes to the stepped portion of the spring lower seat of the front shock absorber.





(e) Install the front coil spring insulator upper to the front suspension support as shown in the illustration.

NOTICE:
The arrow on the front coil spring insulator upper must align with the identification mark on the front suspension.

(f) Align the width across flat on the piston rod end of the shock absorber and width across flat on the suspension support. Then install the suspension support to the shock absorber.
(g) Temporarily tighten the lock nut on the shock absorber.





(h) Adjust the front suspension support sub-assembly so that the bolts come to the positions as shown in the illustration, and remove the SST from the front coil spring.

NOTICE:
^ Do not use an impact wrench.
^ Make sure that the width across flat on the piston rod end is located parallel to the shock absorber bush.
^ Make sure of the direction of the front suspension support sub-assembly when removing the SST.

INSTALLATION





1. TEMPORARILY TIGHTEN FRONT SHOCK ABSORBER WITH COIL SPRING
(a) Install the front shock absorber with coil spring on the vehicle by tightening the 3 nuts on the suspension support side.
Torque: 67 N*m (683 kgf*cm, 49 ft.*lbf)





(b) Install the front shock absorber with coil spring to the front suspension lower arm.
(c) Align the protrusion of the front shock absorber upper bracket plate and the cutout of the front shock absorber bracket lower. Then install the front shock absorber to the front door arm and loosely tighten the nut.





(d) Tighten a new lock nut.
Torque: 28 N*m (286 kgf*cm, 21 ft.*lbf)
2. CONNECT TIE ROD ASSEMBLY





3. CONNECT FRONT SUSPENSION UPPER ARM
(a) Install the steering knuckle to the front suspension upper arm, and tighten it with the castle nut.
Torque: 87 N*m (887 kgf*cm, 64 ft.*lbf)
(b) Install a new clip to the steering knuckle.

NOTICE:
Further tighten the nut up to 60° if the holes for the cotter pin are not aligned.





4. CONNECT SPEED SENSOR FRONT
(a) Install the speed sensor front with the front shock absorber with coil spring on the vehicle with the bolts.
Torque: 6.0 N*m (61 kgf*cm, 53 in.*lbf)

NOTICE:
Do not twist the speed sensor front while installing.





5. CONNECT HEIGHT CONTROL SENSOR LINK SUB-ASSEMBLY FRONT
(a) Install the height control sensor link sub-assembly front to the front suspension lower arm with the nut.
Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf)
6. STABILIZE SUSPENSION





7. INSTALL FRONT SHOCK ABSORBER WITH COIL SPRING
(a) Fully tighten the bolt on the lower side of the front shock absorber while holding the nut.
Torque: 112 N*m (1,140 kgf*cm, 83 ft.*lbf)
8. INSTALL ENGINE ROOM SIDE COVER
9. INSTALL FRONT WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
10. INSPECT AND ADJUST FRONT WHEEL ALIGNMENT

DISPOSAL





1. DISPOSE OF FRONT SHOCK ABSORBER
(a) Fully extend the front shock absorber rod.
(b) Using a drill, make a hole in the cylinder between A and B as shown in the illustration to discharge the gas inside.

CAUTION:
^ Be careful when drilling because shards of metal may fly about, so always use the proper safety equipment.
^ The gas is colorless, odorless and nonpoisonous.



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