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Oil Pump: Inspection

  1. Inspect oil pump housing for cracks or damage. Ensure relief valve slides smoothly in bore. Inspect pressure relief spring for damaged coils.
  2. Inspect oil pump gears for wear or damage. Using a feeler gauge, measure radial and side clearance. If clearance exceeds specification, replace outer gear rotor or case. See the OIL PUMP SPECIFICATIONS table below.
OIL PUMP SPECIFICATIONS

Clearance In. (mm)
Radial .006 (.15)
Side .004 (.11)