Subaru Impreza 2004 Service Manual page 31

BRAKE
If the disc rotor runout is above specified value, re-
place the disc rotor.
Disc rotor runout limit:
0.075 mm (0.0030 in)
4) Set a micrometer 10 mm (0.39 in) inward of the
rotor outer perimeter, and then measure the disc
rotor thickness. If the thickness of disc rotor is out-
side the service limit, replace the disc rotor.
A
Standard
value
24 mm
14"
(0.94 in)
24 mm
15"
(0.94 in)
Disc rotor
thickness A
24 mm
16"
(0.94 in)
30 mm
17"
(1.18 in)
Front Disc Rotor
BR-00019
B
BR-00018
Service Disc outer
limit dia.
22 mm 260 mm
(0.87 in) (10.24 in)
22 mm 277 mm
(0.87 in) (10.91 in)
22 mm 294 mm
(0.87 in) (11.57 in)
28 mm 326 mm
(1.10 in) (12.83 in)
BR-30