Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 469

FS-11

Wheel Alignment

FRONT SUSPENSION

4) Tighten two new flange nuts.
Tightening torque:

155 N·m (15.8 kgf-m, 114.3 ft-lb)

To increase camber.

Rotate the left side counterclockwise.

Rotate the right side clockwise.

To decrease camber.

Rotate the left side clockwise.

Rotate the right side counterclockwise.

FS-00009

FS-00010

FS-00010

FS-00009

FS-12

Wheel Alignment

FRONT SUSPENSION

3. CASTER

• Inspection
1) Place the front wheel on the turning radius

gauge. Make sure the ground contact surfaces of

the front and rear wheels are at the same height.

2) Set the adapter into the center of wheel, and

then set the wheel alignment gauge.

3) Measure the caster angle in accordance with the

operation manual for wheel alignment gauge.

4. STEERING ANGLE

• Inspection
1) Place the vehicle on turning radius gauge.

2) While depressing the brake pedal, turn the steer-

ing wheel fully to the left and right. With the steering

wheel held at each fully turned position, measure

both the inner and outer wheel steering angles.

• Adjustment
1) Turn the tie-rod to adjust the steering angle of

both inner and outer wheels.

2) Check the toe-in.
NOTE:

Correct the boot if it is twisted.

5. FRONT WHEEL TOE-IN

• Inspection
Toe-in:

0

±

3 mm (0

±

0.12 in)

1) Set the toe-in gauge in the position at wheel axis

center height behind the right and left front tires.

2) Place a mark at the center of both left and right

tires, and measure distance “A” between the

marks.

3) Move the vehicle forward to rotate the tires 180°.
NOTE:

Be sure to rotate the tires in the forward direction.

4) Measure the distance “B” between the left and

right marks. Find toe-in using the following calcula-

tion:
A – B = Toe-in

(1) Alignment gauge
(2) Turning radius gauge
(3) Adapter

Model

Caster

Except for STI model

6°30′

STI model

6°30′

Model

Inner wheel

Outer wheel

Except for STI model

36.6°±1.5°

32.2°±1.5°

STI model

36.6°±1.5°

32.2°±1.5°

FS-00213

(1)

(2)

(3)

(1) Lock nut

FS-00014

(1)

FS-00015

A

B

FS-13

Wheel Alignment

FRONT SUSPENSION

• Adjustment
When adjusting the toe-in, adjust it to the following

value.
Toe-in:

0

±

2 mm (0

±

0.08 in)

1) Check that the left and right wheel steering an-

gles are within specification.

2) Loosen the left and right side steering tie-rod

lock nuts.

3) Turn the left and right tie-rods by equal amounts

until the toe-in is at the specification.

Both the left and right tie-rods are right-hand

threaded. To increase toe-in, turn both tie-rods

clockwise by equal amount (viewing from the inside

of vehicle).

4) Tighten the tie-rod lock nut.
Tightening torque:

85 N·m (8.7 kgf-m, 62.7 ft-lb)

NOTE:

Check and correct the tie-rod boot if twisted.

6. REAR WHEEL TOE-IN

• Inspection
Toe-in:

0

±

3 mm (0

±

0.12 in)

Refer to FRONT WHEEL TOE-IN for rear toe-in in-

spection procedures. <Ref. to FS-12, FRONT

WHEEL TOE-IN, INSPECTION, Wheel Align-

ment.>
• Adjustment
When adjusting, adjust it to the following value.
Toe-in:

0

±

2 mm (0

±

0.08 in)

1) Loosen the self-locking nut on the inner side of

front lateral ink.
NOTE:

When loosening or tightening the adjusting bolt,

hold the bolt head and turn the self-locking nut.

2) Turn the adjusting bolt until toe-in is within the

specification.
NOTE:

When the left and right wheels are adjusted for toe-

in at the same time, the movement of one scale

graduation changes toe-in by approx. 1.3 mm (0.05

in).

(1) Lock nut

FS-00014

(1)

(1) Adjusting bolt
(2) Lateral link

FS-00372

(2)

(1)

FS-14

Wheel Alignment

FRONT SUSPENSION

3) Attach and tighten a new self-locking nut.
Tightening torque:

100 N·m (10.2 kgf-m, 73.8 ft-lb)

To increase toe-in.

Rotate the left side clockwise.

Rotate the right side counterclockwise.

To decrease toe-in.

Rotate the left side counterclockwise.

Rotate the right side clockwise.

FS-00018

FS-00019

FS-00019

FS-00018