Oil Pump: Service and Repair

REMOVAL
1. Remove the timing chain.
2. Remove oil pump assembly.

INSTALLATION
^ Installation is in the reverse order of removal.

DISASSEMBLY





^ Disassemble as shown.
^ Assembly is in the reverse order of Disassembly. When assembling the oil pump, apply engine oil to the rotors.

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 - 0.200 mm (0.0045 - 0.0079 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





1. Measure the outer diameter of protruded portion of inner rotor (position A).
2. Measure the inner diameter of oil pump body with inside micrometer (position B).
(clearance 5) = (inner diameter of oil pump body B) - (outer diameter of inner rotor A)
Standard: 0.045 - 0.091 mm (0.0018 - 0.0036 inch)

Regulator Valve





1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve spring.
3. Coat regulator valve with engine oil. Check that it falls smoothly into the valve hole by its own weight.
If damaged, replace regulator valve set or oil pump body.

Regulator Valve Clearance





(Clearance 6) = D (Valve hole diameter) - E (Outer diameter of valve)
Standard: 0.040 - 0.097 mm (0.0016 - 0.0038 inch)
If it exceeds the standard, replace the oil pump body.

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

ASSEMBLY
^ Assembly is in the reverse order of Disassembly.





^ Assemble the inner rotor and outer rotor with the punched marks on the oil pump cover side.