Oil Pump: Service and Repair

1. Drain the engine oil and the differential oil.
2. Turn the crankshaft to TDC.
3. Remove the timing belt.
4. Remove the oil pan.





5. Remove the special bolts, then remove the oil pump.
6. Remove the screws from the pump housing, then separate the housing and cover.





7. Check the inner-to-outer rotor radial clearance on the pump rotor.

Inner Rotor-to-Outer Rotor Radial Clearance:
Standard (New): 0.02 - 0.16 mm (0.001 - 0.0006 inch)
Service Limit: 0.20 mm (0.008 inch)

- If the inner-to-outer rotor clearance exceeds the service limit, replace the inner and outer rotors.





8. Check the housing-to-rotor axial clearance on the pump rotor.

Housing-to-Rotor Axial Clearance:
Standard (New): 0.02 - 0.07 mm (0.001 - 0.003 inch)
Service Limit: 0.12 mm (0.005 inch)

- If the housing-to-rotor axial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.





9. Check the housing-to-outer rotor radial clearance.

Housing-to-Outer Rotor Radial Clearance:
Standard (New): 0.10 - 0.18 mm (0.004 - 0.007 inch)
Service Limit: 0.20 mm (0.008 inch)

- If the housing-to-outer rotor radial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.
10. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
11. Remove the old oil seal from the oil pump.





12. Using the special tool, gently tap in the new crank shaft oil seal until the tool bottoms on the pump.
13. Reassemble the oil pump, applying liquid thread lock to the pump housing screws.
14. Check that the oil pump turns freely.
15. Apply a light coat of oil to the seal lip.
16. Install the two dowel pins and new O-ring on the cylinder block.





17. Apply liquid gasket to the cylinder block mating surface of the oil pump.

NOTE:
- Use liquid gasket, Part No. 08718 - 0001 or 08718 - 0003.
- Check that the mating surfaces are clean and dry before applying liquid gasket. Apply liquid gasket evenly, in a narrow bead centered on the mating surface.
- Do not apply liquid gasket to the O-ring grooves.
- To prevent leakage, apply liquid gasket to the inner threads of the bolt holes.
- Do not install the parts if five minutes or more have elapsed since applying liquid gasket.
Instead, reapply liquid gasket aver removing old residue.
- After assembly, wait at least 30 minutes before filling the engine with oil.





18. Install the oil pump to the cylinder block.
19. Install the oil pan.
20. Install the timing belt.