Cleaning and Inspection

CLEANING
1. If not removed as part of engine disassembly, remove oil pump.
2. If not done already, lift out oil pump intermediate shaft.
3. Remove two screws, oil pump screen cover and tube, and oil pump inlet tube gasket.
4. Remove the cover retaining bolts and the cover.
5. Remove the inner rotor and shaft assembly, then the outer race.
6. Drill a small hole and insert a self-threading sheet metal screw of the proper diameter into the oil pressure relief valve chamber cap and pull the cap out of the chamber. Remove the spring and plunger.
7. Clean all parts in solvent and dry them thoroughly with compressed air. Use a brush to clean the inside of the oil pump housing and pressure relief valve chamber. Make sure all dirt and metal particles are removed.

INSPECTION
1. Look for deep scoring in cover. Light concentric scratches only indicate that the pump has been used and are acceptable. If cover is deeply scored, replace oil pump.
2. Look for scoring or wear on the shaft. If severely scored, replace.
3. Inspect the rotor for burrs or score marks.
4. Remove minor imperfections from parts with an oil stone.