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Oil Pump: Inspection

  1. Inspect components for damage. Ensure relief valve slides freely in bore. Using feeler gauge, measure clearance between driven gear (outer gear) and oil pump housing. Replace pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
  2. Measure tip clearance between driven gear (outer gear) and drive gear (inner gear). Replace gear set if clearance exceeds specification.
  3. With all gears in oil pump housing, place straightedge across oil pump housing. Measure gear end clearance between both gears and straightedge. Replace oil pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
OIL PUMP SPECIFICATIONS

Application In. (mm)
Gear End Clearance .004 (.10)
Gear Tip Clearance .012 (.30)
Driven Gear-To-Housing Clearance .008 (.20)
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