LEXUS SC400 1991 Service Repair Manual

UPPER SUSPENSION ARM
INSTALLATION
SA1A3±01
1. INSTALL UPPER SUSPENSION ARM
(a) Temporarily install the upper suspension arm to the memberwith the bolt and nut.
(b) Connect the upper suspension arm to the steering knuckle with the nut and a new cotter pin.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
2. INSTALL ABS SPEED SENSOR AND WIRE HARNESS
CLAMP
(a) Clamp the wire harness to the upper suspension arm and
body with the 3 bolts.
(b) Install the speed sensor to the steering knuckle with the bolt.
Torque: 7.8 N Vm (80 kgf Vcm, 69 in. Vlbf)
3. LH side only:
CONNECT WASHER TANK
(a) Tighten the bolt.
SA±38
±
SUSPENSION AND AXLE FRONT SUSPENSION
WhereEverybodyKnowsYourName

(b) Install and tighten the bolt.
4. INSTALL FRONT FENDER SPLASH SHEILD
5. INSTALL BRAKE CALIPERInstall the brake caliper to the steering knuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
6. STABILIZE SUSPENSION
(a) Install the front wheel.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up the vehicle and remove the front wheel.
7. TIGHTEN BOLT AND NUT OF UPPER SUSPENSION ARM
(a) Support the lower arm with jack.
(b) Torque the bolt and nut the specified torque.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
8. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
9. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±39
WhereEverybodyKnowsYourName

LOWER SUSPENSION ARM
COMPONENTS
SA00B±0C
SA±40±
SUSPENSION AND AXLE FRONT SUSPENSION
WhereEverybodyKnowsYourName

LOWER SUSPENSION ARM REMOVAL
SA1A4±01
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE ENGINE UNDER COVER
3. REMOVE FRONT BRAKE CALIPER
(b) Hang up the brake caliper using wire, etc.
4. DISCONNECT STABILIZER BAR LINK FROM LOWERSUSPENSION ARM
Remove the nut and disconnect the link from the arm.
5. DISCONNECT STEERING KNUCKLE
(a) Remove the clip and nut.
(b) Using SST, disconnect the steering knuckle from the lower suspension arm.
SST 09628±62011
6. REMOVE LOWER SUSPENSION ARM
(a) R e m o v e t h e b o l t a n d n u t a n d d i s c onnect the lower
suspension arm from the shock absorber.
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±41
WhereEverybodyKnowsYourName

(b) Before loosening the adjusting cam, place matchmarks onthe front and rear adjusting cams and body.
(c) Remove the nuts and adjusting cams and remove the lower suspension arm.
7. REMOVE SHOCK ABSORBER BRACKET FROM LOWER SUSPENSION ARM
Remove the 2 bolts and the bracket from the arm.
LOWER BALL JOINT INSPECTION
SA0RW±04
INSPECT BALL JOINT FOR ROTATION CONDITION
(a) As shown, flip the ball joint stud back and forth 5 times before
installing the nut.
(b) Using torque wrench, turn the nut continuously one turn every 2±4 seconds and take the torque reading on the 5th
turn.
Torque (turning):
1.0±3.4 N Vm (10±35 kgf Vcm, 9±30 in. Vlbf)
If not within specification, replace the lower suspension arm.
SA±42
±
SUSPENSION AND AXLE FRONT SUSPENSION
WhereEverybodyKnowsYourName

LOWER SUSPENSION ARM
INSTALLATION
SA1A5±01
1. INSTALL SHOCK ABSORBER BRACKET TO LOWERSUSPENSION ARM
Install the bracket to the arm with the 2 bolts.
Torque: 52 N Vm (530 kgf Vcm, 38 ft Vlbf)
2. INSTALL LOWER SUSPENSION ARM
(a) Install the lower suspension arm to the body and temporarily
install the adjusting cams and nut.
(b) Connect the lower suspension arm to the steering knuckle.
Torque: 125 N Vm (1,270 kgf Vcm, 92 ft Vlbf)
(c) Install a new clip.
(d) Connect the shock absorber to the lower suspension arm
with the bolt and nut.
Torque: 143 N Vm (1,460 kgf Vcm, 106 ft Vlbf)
2. CONNECT STABILIZER BAR LINK
(a) Connect the stabilizer bar link to the lower suspension arm
with the nut.
Torque: 74 N Vm (750 kgf Vcm, 54 ft Vlbf)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±43
WhereEverybodyKnowsYourName

3. INSTALL BRAKE CALIPERInstall the brake caliper to the steering cnuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
4. STABILIZE SUSPENSION
(a) Install the front wheel and jack down the vehicle.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
5. TORQUE ADJUSTING CAMS AND NUTS
(a) Jack up the vehicle and remove the front wheel.
(b) Support the lower arm with jack.
(c) Align the matchmarks and torque the adjusting cams and nuts with the vehicle weight on the suspension.
Torque: 226 N Vm (2,300 kgf Vcm, 166 ft Vlbf)
6. INSTALL ENGINE UNDER COVER
7. INSTALL FRONT WHEEL
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
8. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
SA±44
±
SUSPENSION AND AXLE FRONT SUSPENSION
WhereEverybodyKnowsYourName

STABILIZER BAR
COMPONENTS
SA033±0B
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±45
WhereEverybodyKnowsYourName

STABILIZER BAR AND LINK REMOVAL
SA0WH±02
1. JACK UP VEHICLE AND REMOVE FRONT WHEELS
2. REMOVE ENGINE UNDER COVER
3. REMOVE BOTH SIDE STABILIZER BAR LINKSRemove the nuts and the stabilizer bar links from the stabiliz-
er bar and the lower suspension arm.
4. REMOVE STABILIZER BAR Remove the 4 bracket mounting bolts and the stabilizer bar
with the cushions and brackets.
5. REMOVE CUSHIONS AND BRACKETS
STABILIZER BAR LINK INSPECTION
SA035±0C
INSPECT BALL JOINT FOR ROTATION CONDITION
(a) As shown, flip the ball joint stud back and forth 5 times, before
installing the nut.
(b) Using a torque wrench, turn the stud continuously one turn every 2±4 seconds and take the torque reading on the 5th
turn.
Torque (turning):
0.05 ± 1.5 N Vm (0.5 ± 15 kgf Vcm, 0.4 ± 13 in. Vlbf)
STABILIZER BAR AND LINK
INSTALLATION
SA0WJ±02
1. INSTALL CUSHIONS AND BRACKETS
(a) Install the cushion so as to touch the line painted on the
stabilizer bar.
HINT: Install the cushion to the inside of the line.
(b) Install the brackets.
SA±46
±
SUSPENSION AND AXLE FRONT SUSPENSION
WhereEverybodyKnowsYourName

2. INSTALL STABILIZER BARInstall the stabilizer bar to the body with the bolts.
Torque: 18 N Vm (180 kgf Vcm, 13 ft Vlbf)
3. INSTALL BOTH SIDE STABILIZER BAR LINKS
Install the stabilizer bar links to the stabilizer bar and the low-
er suspension arm with the nuts.
Torque: 74 N Vm (750 kgf Vcm, 54 ft Vlbf)
4. REMOVE ENGINE UNDER COVER
5. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±47
WhereEverybodyKnowsYourName