Oil Pump: Service and Repair

1. Drain the engine oil.
2. Turn the crankshaft so that the No. 1 piston is at top dead center.
3. Remove the timing belt and the balancer belt.
4. Remove the timing belt tensioner and the balancer belt tensioner.
5. Remove the CKP/TDC sensors, then remove the timing belt drive pulley.
6. Remove the balancer belt driven pulley.
7. Remove the balancer gear case and the balancer driven gear.
8. Remove the oil pan and the oil screen.





9. Remove the mounting bolts and the oil pump assembly.
10. Remove the screws from the pump housing, then separate the housing and cover.





11. Check the inner-to-outer rotor radial clearance on the pump rotor. If the inner-to-outer rotor clearance exceeds the service limit, replace the inner and outer rotors.





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





13. Check the housing-to-outer rotor radial clearance. 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.
14. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
15. Remove the old oil seals from the oil pump.





16. Gently tap in the new oil seals until the special tool bottoms on the pump.

NOTE: The oil seals alone can be replaced without removing the oil pump by using the special tools.





17. Reassemble the oil pump, applying liquid thread lock to the pump housing screws.
18. Check that the oil pump turns freely.
19. Install a dowel pin and the new O-ring on the pump.





20. Apply liquid gasket to the oil pump and install it.

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.
- To prevent leakage of oil, 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 after removing the old residue.
- After assembly, wait at least 30 minutes before filling the engine with oil.
- Apply grease to the lips of the crankshaft oil seal and the balancer shaft seal. Then, install the oil pump inner rotor onto the crankshaft. When the pump is in place, clean any excess grease off the crankshaft and the balancer shaft, then check that the oil seal lips are not distorted.





21. Install the baffle plate.
22. Install the oil screen.





23. Hold the front balancer shaft with a screwdriver, then install the balancer belt driven pulley.





24. Before installing the balancer driven gear and the balancer gear case, apply molybdenum disulfide to the thrust surfaces of the balancer gears, as shown.





25. Hold the rear balancer shaft with the 6 x 100 mm bolt, then install the balancer driven gear.





26. Install the balancer gear case on the oil pump.

NOTE: Align the groove on the pulley edge to the pointer on the gear case while holding the rear balancer with the 6 x 100 mm bolt, then install the gear case.





27. Check the alignment of the pointers after installing the near case.
28. Clean and dry the cylinder block mating surfaces.





29. Apply liquid gasket, part l\lo. 08718 - 0001 or 08718 - 0003, evenly to the cylinder block mating surface of the oil pan and to the inner threads of the bolt holes. Install the oil pan.

NOTE:
- Apply liquid gasket 4 mm wide.
- Apply liquid gasket doubly to the jointing point of the liquid gasket.





30. Tighten the bolts/nuts in two or three steps. In the final step, tighten all bolts/nuts, in sequence to 14 Nm (10 ft. lbs.).