Oil Pump: Service and Repair

OIL PUMP





Removal and Installation

CAUTION: Before installation, apply new engine oil to the parts as instructed in the figure.

REMOVAL
1. Remove front timing chain case and timing chain (primary).
2. Remove oil pump assembly.

INSTALLATION
1. Install in the reverse order of removal paying attention to the following:
^ When installing, align crankshaft flat faces with inner rotor flat faces.

Disassembly and Assembly

DISASSEMBLY
1. Remove oil pump cover.
2. Remove inner rotor and outer rotor from oil pump body.
3. After removing regulator plug, remove regulator spring and regulator valve.

INSPECTION AFTER DISASSEMBLY
Clearance of Oil Pump Parts





^ Measure clearance with feeler gauge.
Clearance between outer rotor and oil pump body (position 1)
Standard: 0.114 - 0.260 mm (0.0045 - 0.0102 inch)
Tip clearance between inner rotor and outer rotor (position 2)
Standard: Below 0.180 mm (0.0071 inch)





^ Measure clearance with feeler gauge and straightedge.
Side clearance between inner rotor and oil pump body (position 3)
Standard: 0.030 - 0.070 mm (0.0012 - 0.0028 inch)
Side clearance between outer rotor and oil pump body (position 4)
Standard: 0.050 - 0.110 mm (0.0020 - 0.0043 inch)





Calculate the clearance between inner rotor and oil pump body as follows.
^ Measure the inner diameter of oil pump body with inside micrometer (Position 5)
^ Measure the outer diameter of protruded portion of inner rotor (Position 6)
^ (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor)
Standard: 0.045 - 0.091 mm (0.0018 - 0.0036 inch)

Regulator Valve Clearance





(Clearance) = (Valve hole diameter) - (Outer diameter of valve)
Standard: 0.040 - 0.097 mm (0.0016 - 0.0038 inch)

CAUTION: Coat regulator valve with engine oil. Check that it falls smoothly into the valve hole by its own weight.

ASSEMBLY
Install in the reverse order of removal paying attention to the following.





^ Install inner rotor with the groove faced to the oil pump cover side.