Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 479

WT-3

General Description

WHEEL AND TIRE SYSTEM

B: COMPONENT

C: PREPARATION TOOL

1. GENERAL TOOL

(1)

TPMS & keyless entry control
module

(3)

Transmitter (snap in type)

Tightening torque: N·m (kgf-m, ft-lb)

(2)

Screw

(4)

Valve

T1: 1.4 (0.14, 1)

T2: 13 (1.33, 9.6)

WT-00168

(1)

(3)

(4)

(2)

T1

T2

TOOL NAME

REMARKS

Air pressure gauge

Used for measuring tire air pressure.

Dial gauge

Used for measuring wheel runout.

WT-4

Tire and Wheel

WHEEL AND TIRE SYSTEM

2. Tire and Wheel

A: REMOVAL

1) Lift up the vehicle.

2) Remove the wheel nut.

3) Remove the wheels.
NOTE:

When removing the wheels, be careful not to damage the hub bolts.

B: INSTALLATION

1) Install the wheels to vehicle.

2) Tighten the wheel nuts to the specified torque.
Tightening torque:

100 N·m (10.2 kgf-m, 73.8 ft-lb)

C: INSPECTION

1. TIRES

CAUTION:

When replacing a tire, make sure to use only tires of the same size, construction and load range as

originally installed.

1) Tire size and tire inflation pressure check <Ref. to WT-2, SPECIFICATION, General Description.>

2) Cracks, damage and wear check

3) Tire runout check

(1) Lift up the vehicle.

(2) Slowly rotate the wheel to check rim “runout” using a dial gauge.

• Aluminum wheel

• Steel wheel

(3) If the rim runout exceeds service limit, replace the wheel.

WT-00004

Axial runout limit

Radial runout limit

1.0 mm (0.039 in)

Axial runout limit

Radial runout limit

1.5 mm (0.059 in)

WT-5

Tire and Wheel

WHEEL AND TIRE SYSTEM

2. TIRE ROTATION

NOTE:

Rotate tires periodically (12,500 km/7,500 miles) in order to prolong life and to prevent uneven wear.

Rotate tires as shown in the figure depending on whether or not the direction of the tire rotation is specified.

• When the direction of tire rotation is not specified

• When the direction of tire rotation is specified

WT-00113

1

(1) Front side of vehicle

WT-00115

1

(1) Front side of vehicle

WT-6

Tire and Wheel

WHEEL AND TIRE SYSTEM

3. WHEEL BALANCING

1) Using the wheel balancer, measure wheel balance.

2) Adjust the wheel balancing.
NOTE:

• Unbalance after adjusting the wheel balancing should be 5 g (0.18 oz) or less.

• When using the adhesive type weight, degrease the surface where the adhesive type weight will be ap-

plied securely.

• After applying the adhesive type weight, apply a force to the weight and attain full adhesion.

• Using the knock-on type weight, check the size of the knock-on part.

Service limit A:

Knock-on type weight for steel wheel:

2.0 mm (0.079 in)

Knock-on type weight for aluminum wheel:

5.0 mm (0.197 in)

(1)

(2)

A

A

WT-00107

(1) Knock-on type weight for aluminum wheel
(2) Knock-on type weight for steel wheel