Subaru IMPREZA 2002 Service Manual page 151

CAMSHAFT SPROCKET
MECHANICAL
C: INSPECTION
1) Check the sprocket teeth for abnormal wear and
scratches.
2) Make sure there is no free play between sprock-
et and key.
3) Check the camshaft sprocket notch used for
sensor for damage and contamination of foreign
matter.
ME( S0HC)-53