Subaru IMPREZA 2002 Service Manual page 274

OIL PUMP
LUBRICATION
3. SIDE CLEARANCE
Measure the clearance between oil pump inner ro-
tor and pump cover. If the clearance exceeds the
limit, replace rotor or pump body.
Side clearance:
Standard
Limit
0.02
-
0.07 mm (0.0008
-
0.0028 in)
0.12 mm (0.0047 in)
4. OIL
RELIEF VALVE
Check the valve for fitting condition and damage,
and the relief valve spring for damage and deterio-
ration. Replace the parts if defective.
Relief valve spring:
Free length
71.8 mm (2.827 in)
lnstalled length
54.7 mm (2.154 in)
Load when installed
77.08 N (7.86 kg, 17.33 lb)
5. OIL PUMP CASE
Check the oil pump case for worn shaft hole,
clogged oil passage, worn rotor chamber, cracks,
and other faults.
6. OILSEAL
Check the oil seal lips for deformation, hardening,
wear, etc, and replace if defective.
LU-16