Oil Pump: Service and Repair

Oil Pump Overhaul

Special Tools Required
^ Oil Seal Driver 07GAD-PH70201

Removal
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.
4. Remove the idler pulley.
5. Remove the Crankshaft Position (CKP) sensor, then remove the timing belt drive pulley.
6. Remove the VTEC solenoid valve and oil filter assembly.





7. Remove the oil pan and the oil screen (A).
8. Remove the mounting bolts and the oil pump assembly (B).
9. Remove the screws from the pump housing, then separate the housing and cover.

Inspection





10. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and outer rotor (B). If the inner-to-outer rotor clearance exceeds the service limit, replace the oil pump assembly.





11. Check the housing-to-rotor axial clearance between the rotors (A) and pump housing (B). If the housing-to-rotor axial clearance exceeds the service limit, replace the oil pump assembly.





12. Check the housing-to-outer rotor radial clearance between the outer rotor (A) and pump housing (B). If the housing-to-outer rotor radial clearance exceeds the service limit, replace the oil pump assembly.
13. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
14. Remove the old oil seals from the oil pump.





15. Gently tap in the new oil seals until the special tool bottoms on the pump.
16. Apply liquid thread lock to the pump housing screws.

Installation
17. Reassemble the oil pump.
18. Check that the oil pump turns freely.
19. Clean and dry the oil pump mating surfaces.





20. Install the oil pump (A).
^ 1 Apply liquid gasket, part No.08718-0001 or 08718-0003, evenly to the block mating surface of the oil pump and to the inner threads of the bolt holes.

NOTE: Do not install the parts if 5 minutes or more have elapsed since applying the liquid gasket. Instead, reapply liquid gasket after removing the old residue.

^ 2 Grease the lip of the oil seal and apply oil to the new O-rings (B).
^ 3 Install the dowel pins (C), then align the inner rotor with the crankshaft and install the oil pump.
^ 4 Clean the excess grease off the crankshaft, and check the seal for distortion.
21. Install the oil screen (D).
22. Clean and dry the oil pan mating surfaces.
23. Apply liquid gasket, part No. 08718-0001 or 087180003, evenly to the oil pan mating surface of the block and to the inner threads of the bolt holes.

NOTE: Do not install the parts if 5 minutes or more have elapsed since applying the liquid gasket. Instead, reapply liquid gasket after removing the old residue.





24. Install the oil pan.





25. Tighten the bolts in two or three steps. In the final step, tighten all bolts, in sequence to 12 Nm (1.2 kgf-cm, 8.7 ft. lbs.).