Overhaul

DISASSEMBLY





1. Remove oil level gauge guide bolt and pull out guide from oil pump.





2. Remove rotor plate.





3. Remove outer rotor and inner rotor.

INSPECTION





- Check oil seal lip for fault or other damage. Replace as necessary.





NOTE: When installing oil seal, press-fit it till its end face is flush with oil pump case end face.





- Check outer and inner rotors, rotor plate, and oil pump case for excessive wear or damage.

MEASUREMENT





Radial Clearance
Check radial clearance between outer rotor and case, using thickness gauge.
If clearance exceeds its limit, replace outer rotor or case.

Limit on radial clearance between outer rotor and case: 0.310 mm (0.0122 inch)





Side Clearance
Using straight edge and thickness gauge, measure side clearance.

Limit on side clearance: 0.15 mm (0.0059 inch)

ASSEMBLY
1. Wash, clean and then dry all disassembled parts.
2. Apply thin coat of engine oil to inner and outer rotors, oil seal lip portion, and inside surfaces of oil pump case and plate.





3. Install outer and inner rotors to pump case.





4. Install rotor plate. Tighten 5 screw securely. After installing plate, check to be sure that gears turn smoothly by hand.

Tightening Torque (a): 11 Nm (96 inch lbs.)





5. Apply engine oil to O-ring and install O-ring and guide.