Lexus SC300 / Lexus SC400. Service manual — part 825

UPPER SUSPENSION ARM REMOVAL

SA1A2–01

1.

JACK UP VEHICLE AND REMOVE FRONT WHEEL

2.

REMOVE FRONT BRAKE CALIPER AND DISC

(a) Remove the 2 bolts and brake caliper from the steering

knuckle.

(b) Hang up the caliper using wire, etc.

3.

REMOVE FRONT FENDER SPLASH SHIELD

4.

LH side only:
MOVE WASHER TANK

(a) Loosen the bolt.

(b) Remove the bolt and move the washer tank away from the

body.

5. REMOVE ABS SPEED SENSOR AND WIRE HARNESS

CLAMP

(a) Remove the bolt and disconnect the speed sensor from the

steering knuckle.

SA–36

–

SUSPENSION AND AXLE

FRONT SUSPENSION

(b) Remove the 3 bolts and wire harness clamp to prevent the

wire harness being damaged when removing or installing the
through bolt.

6.

REMOVE UPPER SUSPENSION ARM

(a) Remove the cotter pin and the nut.
(b) Using SST, disconnect the upper suspension arm from the

steering knuckle.
SST 09628–62011

(c) Remove the bolt and nut.
(d) Remove the upper suspension arm.

UPPER BALL JOINT INSPECTION

SA0RU–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 a 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

⋅

m (10–35 kgf

⋅

cm, 9–30 in.

⋅

lbf)

If not within specification, replace the upper suspension arm.

–

SUSPENSION AND AXLE

FRONT SUSPENSION

SA–37

UPPER SUSPENSION ARM
INSTALLATION

SA1A3–01

1.

INSTALL UPPER SUSPENSION ARM

(a) Temporarily install the upper suspension arm to the member

with 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

⋅

m (1,050 kgf

⋅

cm, 76 ft

⋅

lbf)

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

⋅

m (80 kgf

⋅

cm, 69 in.

⋅

lbf)

3.

LH side only:
CONNECT WASHER TANK

(a) Tighten the bolt.

SA–38

–

SUSPENSION AND AXLE

FRONT SUSPENSION

(b) Install and tighten the bolt.
4.

INSTALL FRONT FENDER SPLASH SHEILD

5. INSTALL

BRAKE

CALIPER

Install the brake caliper to the steering knuckle with the 2
bolts.

Torque: 118 N

⋅

m (1,200 kgf

⋅

cm, 87 ft

⋅

lbf)

6. STABILIZE

SUSPENSION

(a) Install the front wheel.

Torque: 103 N

⋅

m (1,050 kgf

⋅

cm, 76 ft

⋅

lbf)

(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

⋅

m (1,670 kgf

⋅

cm, 121 ft

⋅

lbf)

8.

INSTALL FRONT WHEEL AND LOWER VEHICLE

Torque: 103 N

⋅

m (1,050 kgf

⋅

cm, 76 ft

⋅

lbf)

9.

CHECK FRONT WHEEL ALIGNMENT
(See page

SA–5

)

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SUSPENSION AND AXLE

FRONT SUSPENSION

SA–39