Subaru Impreza 2002 Service Manual page 203

MECHANICAL
6) Measure the thrust clearance of camshaft with
dial gauge. If the clearance exceeds the limit, re-
place caps and cylinder head as a set. If necessary
replace the camshaft.
Standard:
0.015 — 0.070 mm (0.0006 — 0.0028 in)
Limit:
0.1 mm (0.004 in)
CAMSHAFT
B2M1217
ME(STi)-64