Subaru Impreza 2002 Service Manual page 542

3. Front Disc Rotor
C: INSPECTION
1) Secure the disc rotor by tightening five wheel
nuts.
2) Set a dial gauge on the disc rotor. Turn the disc
rotor to check runout.
CAUTION:
Securely fix the disc rotor to hub.
NOTE:
• Make sure that the dial gauge is set 5 mm (0.20
in) inward of rotor outer perimeter.
• If the disc rotor runout is above standard value,
inspect the play of hub bearing axial direction and
runout of axle hub. <Ref. to DS-23, INSPECTION,
Front Axle.> If the bearing and hub are normal, re-
place the disc rotor.
Disc rotor runout limit:
0.075 mm (0.0030 in)
3) Measure the disc rotor thickness.
If the thickness of disc rotor is outside the standard
value, replace the disc rotor.
NOTE:
Make sure that a micrometer is set 5 mm (0.20 in)
inward of the rotor outer perimeter.
FRONT DISC ROTOR
Disc rotor
thickness A
B4M2353
G4M0365
BR-9
Standard Service
value limit
24 mm 22 mm
14"
(0.94 in) (0.87 in)
24 mm 22 mm
15"
(0.94 in) (0.87 in)
24 mm 22 mm
16"
(0.94 in) (0.87 in)
30 mm 28 mm
17"
(1.18 in) (1.10 in)
BRAKE
Disc outer
dia.
260 mm
(10.24 in)
277 mm
(10.91 in)
294 mm
(11.57 in)
326 mm
(12.83 in)