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5-30
E
POWR
OIL PUMP
SERVICE POINTS
Oil pump inspection
1. Check:
• Oil pump housing cover 1
1
• Oil pump housing cover 2
2
• Oil pump housing 1
3
• Oil pump housing 2
4
Cracks/damage/wear
→
Replace the
defective part(s).
1
2
3
4
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance
a
• Outer-rotor-to-oil-pump-housing
clearance
b
Out of specification
→
Replace the oil
pump.
1
Inner rotor
2
Outer rotor
3
Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
a
:
0.09–0.15 mm (0.0035–0.0059 in)
Outer-rotor-to-oil-pump-housing
clearance
b
(scavenge pump):
0.09–0.15 mm (0.0035–0.0059 in)
Outer-rotor-to-oil-pump-housing
clearance
b
(feed pump):
0.09–0.17 mm (0.0035–0.0067 in)
3. Check:
• Oil pump operation
Rough movement
→
Replace the defec-
tive part(s).
Check valve inspection
1. Check:
• Check valve seat
1
• Check valve body
2
• Check valve
3
• Spring
4
Damage/wear
→
Replace the defective
part(s).
1
2
3
4