Oil Pump: Service and Repair

Engine Oil Pump Overhaul

Exploded View





Special Tools Required

- Support Eyelet 07AAK-SNAA600
- Engine Support Hanger, A and Reds AAR-T1256
*: This special tool is available through the Honda Tool and Equipment Program

Removal

1. Remove the under-cowl panel Service and Repair.

2. Remove the cam chain Cam Chain Removal.

3. Remove the alternator mounting bolt, then install the support eyelet.






4. Install the A and Reds engine support hanger (AAR-T1256), then attach the hook to the slotted hole in the support eyelet. Tighten the wing nut (A) by hand to lift and support the engine.





5. Remove the oil pan Engine Oil Pan Removal.

6. Remove the oil screen (A), then remove the oil pump (B).






Inspection

1. Remove the screws from the oil pump housing, then separate the pump housing and pump cover.

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

Inner Rotor-to-Outer Rotor Radial Clearance










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

Housing-to-Rotor Axial Clearance










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

Pump Housing-to-Outer Rotor Radial Clearance









5. Inspect both rotors and the pump housing for scoring or other damage. Replace the parts, if necessary.

6. Check that the oil pump turns freely.

Installation

1. Clean the O-ring groove and the mating surface of the engine block.

2. Install the oil pump (A) with a new O-ring (B).





3. Install the oil screen (C) with a new gasket (D).

4. Install the oil pan Engine Oil Pan Installation.

5. Support the engine with a jack and a wood block under the oil pan.

6. Remove the engine hanger and support eyelet, then tighten the alternator mounting bolt.





7. Install the cam chain Cam Chain Installation.