Oil Pump: Service and Repair

Removal
1. Remove the oil pan.





2. Remove the oil pump chain tensioner.





3. Remove the oil pump.

Inspection
1. Remove the pump cover.





2. 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 - 0.15 mm (0.001 - 0.006 inch)
Service Limit: 0.20 mm (0.08 inch)





3. 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)





4. 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): 0.15 - 0.21 mm (0.006 - 0.008 inch)
Service Limit: 0.23 mm (0.009 inch)
5. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
6. Install the oil pump cover.

Installation





1. Install the oil pump.





2. Squeeze the new oil pump chain tensioner (A), then install the set clip (B) on it as shown.

NOTE: The set clip is supplied with the oil pump chain tensioner.





3. Install the oil pump chain tensioner.





4. Remove the set clip from the oil pump chain tensioner.
5. Install the oil pan.