Oil Pump: Service and Repair

Overhaul

Special Tools Required
^ Driver 07749-0010000
^ Attachment, 52 x 55 mm 07746-0010400

NOTE: Refer to the Exploded View as needed during this procedure.

Removal
1. Drain the engine oil.
2. Remove the timing belt.
3. Remove the oil pan.





4. Remove the oil screen (A).
5. Remove the mounting bolts and the oil pump assembly (B).
6. Remove the screws from the pump housing, then separate the housing and cover.

Inspection





7. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and outer rotor (B). If the inner-to-outer rotor radial clearance exceeds the service limit, replace the oil pump assembly.
Inner Rotor-to-Outer Rotor Radial Clearance
Standard (New): 0.060 - 0.180 mm (0.002 - 0.007 inch)
Service Limit: 0.20 mm (0.008 inch)





8. Check the housing-to-rotor axial clearance between the rotor (A) and pump housing (B). If the housing-to-rotor axial clearance exceeds the service limit, replace the oil pump assembly.
Housing-to-Rotor Axial Clearance
Standard (New): 0.02 - 0.07 mm (0.001 - 0.003 inch)
Service Limit: 0.15 mm (0.006 inch)





9. 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 pump assembly.
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)
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. Gently tap in the new oil seal until the special tool bottoms on the pump.
13. Apply liquid thread lock to the pump housing screws.

Installation
14. Reassemble the oil pump.
15. Check that the oil pump turns freely.
16. Clean and dry the oil pump mating surface.





17. Install the oil pump (A).
1 Apply liquid gasket, P/N 08718-0001 or 08718-0003, evenly to the block mating surface of the oil pump and to the inner threads of the bolt holes.
-2 Grease the lips of the oil seal and apply oil to the new O-ring (B).
-3 Install a 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 balancer shaft, and check the seal for distortion.

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

18. Install the oil screen (D) with a new gasket (E).
19. Install the oil pan:
^ Aluminum Oil Pan Type.
^ Steel Oil Pan Type.