Subaru IMPREZA GD 2007 Series Manual page 2387

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LUBRICATION
E: INSPECTION
1. TIP CLEARANCE
Measure the tip clearance of rotors. If the clearance
exceeds the limit, replace rotors as a matched set.
Tip clearance:
Standard
0.04 — 0.14 mm (0.0016 — 0.0055 in)
Service limit
0.18 mm (0.0071 in)
2. CASE CLEARANCE
Measure the clearance between outer rotor and oil
pump case. If the clearance exceeds the limit, re-
place the rotor.
Case clearance:
Standard
0.10 — 0.175 mm (0.0039 — 0.0069 in)
Service limit
0.20 mm (0.0079 in)
Oil Pump
3. SIDE CLEARANCE
Measure the clearance between oil pump inner ro-
tor and oil pump case. If the clearance exceeds the
limit, replace rotor or oil pump case.
Side clearance:
Standard
0.02 — 0.07 mm (0.0008 — 0.0028 in)
Service limit
0.12 mm (0.0047 in)
LU-00023
4. OIL RELIEF VALVE
Check the valve for poor assembly condition and
damage, and the relief valve spring for damage and
deterioration. Replace the parts if defective.
Relief valve spring:
Free length
73.7 mm (2.902 in)
Installed length
54.7 mm (2.154 in)
Load when installed
93.1 N (9.49 kgf, 20.88 lbf)
5. OIL PUMP CASE
Check for worn shaft holes, clogged oil passages,
cracks and other faults.
6. OIL SEAL
Check the oil seal lips for deformation, hardening,
wear, etc. and replace if defective.
LU-00024
LU(H4DOTC)-16
LU-00025