51. Oil Pump Clean and Inspect

1. Use a suitable solvent to clean the oil pump.
2. Remove all old gasket material from the engine front cover and from the engine block.
3. Inspect the oil pump cover and the engine front cover for the following damage:
^ Cracks
^ Scoring
^ Porous or damaged casting
^ Damaged threads
^ Excessive wear

4. Inspect the pressure regulator valve for the following damage:
^ Scoring
^ Sticking in the bore
^ Burrs
^ Foreign material

5. Inspect the pressure regulator spring for loss of tension or bending. Replace the pressure regulator spring if damaged.
6. Inspect the oil pump gears for the following conditions:
^ Chipping
^ Galling
^ Scoring
^ Excessive wear





7. Measure the inner oil pump gear tip clearance.





8. Measure the outer oil pump gear diameter clearance.





9. Measure the oil pump gear end clearance.
10. Measure the pressure regulator valve-to-bore clearance.