Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 560
BR-25
Rear Brake Pad
BRAKE
B: INSTALLATION
1. BREMBO TYPE
1) Apply a thin coat of Molykote M7439 or grease
contained in the pad kit to the pad side.
2) Apply a thin coat of Molykote AS880N (Part No.
K0777YA010) or the grease contained in the pad
kit to the contact surface between the pad and pad
shim.
3) Install the pads to the caliper body.
4) Install the cross spring and pad pins.
5) Install the clips.
2. EXCEPT FOR BREMBO TYPE
1) Apply a thin coat of Molykote M7439 or grease
contained in the pad kit to the pad clip.
2) Apply a thin coat of Molykote AS880N (Part No.
K0777YA010) or grease contained in the pad kit
between the outer pad and shim.
3) Apply a thin coat of Molykote AS880N (Part No.
K0777YA010) or grease contained in the pad kit to
both surfaces of the inner pad inner shim.
4) Install the pad to support.
5) Install the caliper body to the support.
Tightening torque:
27 N·m (2.75 kgf-m, 19.9 ft-lb)
6) Install the brake hose bracket.
Tightening torque:
33 N·m (3.36 kgf-m, 24.3 ft-lb)
BR-00784
BR-00785
BR-00599
BR-00875
BR-00876
BR-26
Rear Brake Pad
BRAKE
C: INSPECTION
Check the pad thickness A.
• Brembo type
• Except for brembo type
NOTE:
• Always replace the pads of both wheels and both
sides as a set.
• Replace the cross spring and pad pins if they are
twisted or worn. (Brembo type)
• A wear indicator is installed on the outer disc
brake pad. (Brembo type)
• Wear indicators are installed on the inner and
outer disc brake pads. (Except for brembo type)
• If the pad is worn to the limit, the end of wear in-
dicator contacts disc rotor, and a squeaking sound
is heard as the wheel rotates. If the sound is heard,
replace the pad.
• Replace the pad if there is oil or grease on it.
Pad thickness A
mm (in)
Standard
9.0 (0.354)
Wear limit
1.2 (0.047)
Pad thickness A
mm (in)
Standard
9.0 (0.354)
Wear limit
1.5 (0.059)
A
BR-00314
BR-00889
A
BR-27
Rear Disc Rotor
BRAKE
6. Rear Disc Rotor
A: REMOVAL
1) Lift up the vehicle, and then remove the rear
wheels.
2) Release the parking brake.
3) Remove the brake hose bracket.
4) Remove the caliper body assembly from hous-
ing, and suspend it from the strut using a wire.
CAUTION:
Be careful not to stretch the brake hose.
• Brembo type
• Except for brembo type
5) Remove the disc rotor.
NOTE:
If it is difficult to remove the disc rotor, perform the
following two methods in order.
(1) Turn the adjusting screw using a flat tip
screwdriver until the brake shoe is far enough
away to allow removal of the disc rotor.
(2) If it is difficult to remove the disc rotor from
the hub, drive an 8 mm bolt into the threads B of
the rotor, then remove the rotor.
B: INSTALLATION
1) Install each part in the reverse order of removal.
Tightening torque:
Brake hose bracket
33 N·m (3.36 kgf-m, 24.3 ft-lb)
Caliper body assembly (17-inch type)
65 N·m (6.63 kgf-m, 47.9 ft-lb)
Caliper body assembly (15-inch type)
66 N·m (6.73 kgf-m, 48.7 ft-lb)
2) Adjust the parking brake. <Ref. to PB-8, AD-
JUSTMENT, Parking Brake Assembly (Rear Disc
RS-00264
BR-00703
BR-00743
(1) Adjusting screw
(2) Flat tip screwdriver
(3) Disc rotor
(1)
(3)
(2)
BR-00734
BR-00018
B
A
BR-28
Rear Disc Rotor
BRAKE
C: INSPECTION
1) Check the rear wheel bearing play and axle hub
runout before inspecting the disc rotor runout.
<Ref. to DS-26, INSPECTION, Rear Hub Unit
2) Secure the disc rotor by tightening the five wheel
nuts.
3) Set a dial gauge 10 mm (0.39 in) inward from the
disc rotor outer circumference. Rotate the disc rotor
to check runout. If the disc rotor runout exceeds the
limit, resurface the disc rotor. After grinding, check
the thickness of the disc rotor according to the pro-
cedure in step 4).
Disc rotor runout limit:
Brembo type
0.070 mm (0.0028 in)
Except for brembo type
0.050 mm (0.0020 in)
4) Set a micrometer 10 mm (0.39 in) inward from
the disc rotor outer perimeter, and then measure
the disc rotor thickness. If the thickness A of the
disc rotor exceeds the service limit, replace with a
new disc rotor.
Disc rotor thick-
ness A
mm (in)
Standard
Limit
Disc rotor
diameter
Brembo type
20 (0.79)
18 (0.71)
316 (12.44)
Except for brembo
type
10 (0.39)
8.5 (0.335) 286 (11.26)
BR-00037
BR-00018
B
A
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