OIL PUMP
5-61
EAS24960
CHECKING THE OIL PUMP
1. Check:
• Oil pump driven sprocket
• Oil pump housing
• Oil pump housing cover
Cracks/damage/wear → Replace the defec-
tive part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance “a”
• Outer-rotor-to-oil-pump-housing clearance
“b”
• Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance “c”
Out of specification → Replace the oil pump.
3. Check:
• Oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
EAS24970
CHECKING THE RELIEF VALVE
1. Check:
• Relief valve body “1”
• Relief valve “2”
• Spring “3”
• O-ring “4”
Damage/wear → Replace the defective
part(s).
EAS24980
CHECKING THE OIL DELIVERY PIPES
The following procedure applies to all of the oil
delivery pipes.
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.12 mm (0.0047 in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.09–0.15 mm (0.0035–0.0059 in)
Limit
0.22 mm (0.0087 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.03–0.08 mm (0.0012–0.0032 in)
Limit
0.15 mm (0.0059 in)
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