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EAS24960
CHECKING THE OIL PUMP
1. Check:
• Oil pump drive gear
• Oil pump driven gear
• 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.
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.149 mm (0.0000–
0.0059 in)
Limit
0.23 mm (0.0091 in)
Outer-rotor-to-oil-pump-housing
clearance
0.013–0.036 mm (0.0005–0.0014
in)
Limit
0.106 mm (0.0042 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.04–0.09 mm (0.0016–0.0035 in)
Limit
0.16 mm (0.0063 in)
3. Check:
• Oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
EAS25000
ASSEMBLING THE OIL PUMP
1. Lubricate:
• Inner rotor
• Outer rotor
Recommended lubricant
Engine oil
2. Lubricate:
• Oil pump shaft
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide grease
3. Install:
• Oil pump shaft "1"
• Pin "2"
5-51
OIL PUMP
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