Disassembly and Assembly

OIL PUMP


Disassembly and Assembly












CAUTION:
Before assembly, apply new engine oil to the parts as shown above.

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

INSPECTION AFTER DISASSEMBLY
Measure the clearance of the oil pump parts to check they are within specification.





1. Measure clearance with feeler gauge as follows:
- Clearance between outer rotor and oil pump body (position 1).





- Tip clearance between inner rotor and outer rotor (position 2).










2. Measure clearance with feeler gauge and straightedge as follows:
- Side clearance between inner rotor and oil pump body (position 3).





- Side clearance between outer rotor and oil pump body (position 4).










3. Calculate the clearance between inner rotor and oil pump body as follows:
- Measure the outer diameter of protruded portion of inner rotor
(Position 5).





- Measure the inner diameter of oil pump body with inside micrometer (Position 6).
- (Clearance) = (Inner diameter of oil pump body) � (Outer diameter of inner rotor).





4. Calculate regulator valve clearance as follows:





- (Clearance) = D1(Valve hole diameter) � D2 (Outer diameter of valve)






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.
- Install the inner rotor and outer rotor with the punched marks on the oil pump cover side.

CAUTION:
Before assembly, apply new engine oil to the parts as specified.