Oil Pump: Service and Repair

Overhaul

Special Tools Required
^ Driver 07749-0010000
^ Attachment, 52 x55 mm 07746-0010400

Removal
1. Remove the timing chain.

Inspection
2. Remove the pump cover.





3. 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.
Inner Rotor-to-Outer Rotor Radial Clearance
Standard (New): 0.02 - 0.14 mm (0.001 - 0.006 inch)
Service Limit: 0.18 mm (0.007 inch)





4. 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.
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)





5. 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.
Housing-to-Outer Rotor Radial Clearance
Standard (New): 0.100 - 0.175 mm (0.0039 - 0.0069 inch)
Service Limit: 0.20 mm (0.008 inch)
6. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
7. Remove the old oil seal from the oil pump.





8. Use the special tools to install a new oil seal. Drive the seal until the special tool bottoms on the oil pump
9. Install the oil pump cover.

Installation
10. Install the timing chain.