Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 466

2014 IMPREZA WRX STI SERVICE MANUAL

QUICK REFERENCE INDEX

FUJI HEAVY INDUSTRIES LTD.

G1180BE6

CHASSIS SECTION

This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.

All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.

FRONT SUSPENSION

FS

REAR SUSPENSION

RS

WHEEL AND TIRE SYSTEM

WT

TIRE PRESSURE MONITORING SYSTEM
(DIAGNOSTICS)

TPM(diag)

DIFFERENTIALS

DI

TRANSFER CASE

TC

DRIVE SHAFT SYSTEM

DS

VEHICLE DYNAMICS CONTROL (VDC)

VDC

VEHICLE DYNAMICS CONTROL (VDC)
(DIAGNOSTICS)

VDC(diag)

BRAKE

BR

PARKING BRAKE

PB

POWER ASSISTED SYSTEM
(POWER STEERING)

PS

FRONT SUSPENSION

FS

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . ...2

2.

Wheel Alignment . . . . . . . . . . . . . . . . . . . . . . 8

3.

Front Crossmember Support Plate . . . . . . . . . . . . . . ..16

4.

Front Stabilizer . . . . . . . . . . . . . . . . . . . . . . .17

5.

Front Ball Joint . . . . . . . . . . . . . . . . . . . . . . .18

6.

Front Arm . . . . . . . . . . . . . . . . . . . . . . . . .20

7.

Front Strut . . . . . . . . . . . . . . . . . . . . . . . . 24

8.

Front Crossmember . . . . . . . . . . . . . . . . . . . . .27

9.

General Diagnostic Table . . . . . . . . . . . . . . . . . . .28

FS-2

General Description

FRONT SUSPENSION

1. General Description

A: SPECIFICATION

NOTE:

• Front and rear toe-in and front camber can be adjusted. Adjust if the toe-in or camber tolerance exceeds

specifications.

• Other items indicated in the specifications is not equipped with adjustment mechanisms. If other items ex-

ceed specifications, check the suspension parts and connections for deformation. If defective, replace with

new parts.

Model

Except for STI model

STI model

Front

Wheel arch height
(Tolerance:

+12 mm

–24 mm

(

+0.47 in

–0.94 in

))

mm (in)

376 (14.8)

371 (14.6)

Camber (Tolerance: ±0°45′ Differences between RH and LH:
45′ or less)

–0°50′

–0°45′

Caster (Referential Value)

6°30′

6°30′

Steering angle (Tolerance: ±1.5°)

Inner wheel

36.6°

36.6°

Outer wheel

32.2°

32.2°

Toe-in

mm (in)

0±3 (0±0.12) Toe angle (sum of both wheels):

0°±0°15′

Kingpin angle (Referential Value)

15°15′

15°15′

Rear

Wheel arch height
(Tolerance:

+12 mm

–24 mm

(

+0.47 in

–0.94 in

))

mm (in)

370 (14.6)

365 (14.4)

Camber (Tolerance: ±0°45′ Differences between RH and LH:
45′ or less)

17-inch tire: –1°35′

–1°30′

Toe-in

mm (in)

0±3 (0±0.12) Toe angle (sum of both wheels):

0°±0°15′

Thrust angle (Tolerance: ±0°30′)

0°

(1) Front

A – B = Positive: Toe-in, Negative: Toe-out

α = Individual toe angles

B

A

(1)

FS-00269