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

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

INSPECTION AFTER DISASSEMBLY
Oil Pump Clearance





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





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





Calculate the clearance between oil pump 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 oil pump inner rotor (Position "6")
^ (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of oil pump inner rotor)
Standard: 0.045 - 0.091 mm (0.0018 - 0.0036 inch)

Regulator Valve Clearance





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

CAUTION:
^ Coat regulator valve with new engine oil.
^ Make sure it falls smoothly into the regulator valve hole by its own weight.

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





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