Oil Pump: Testing and Inspection

CLEANING
Wash all parts in a solvent and dry them thoroughly with compressed air. Use a brush to clean the inside of the pump housing and the pressure relief valve chamber. Make sure all dirt and metal particles are removed.

INSPECTION
Check the inside of the oil pump housing and gears for damage or excessive wear.

Replace the oil pump if housing and/or gears are excessively worn, scored or grooved. Inspect gears for nicks, burrs or score marks. Remove minor imperfections with an oil stone.

PRESSURE REGULATOR VALVE INSPECTION

NOTE: Do not service internal components. If any component fails the visual inspections, the complete oil pump assembly must be replaced.

Inspect the relief valve spring to see if it is collapsed or worn. Check the relief valve spring tension. If the valve spring tension is weak and/or the valve spring is worn or damaged, replace the oil pump. Check the relief valve piston for free operation in the bore.