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Oil Pump: Inspection

  1. Place straightedge across gears in pump body. Using feeler gauge, measure gear end clearance between pump body and straightedge. If gear end clearance is excessive, replace oil pump assembly.
  2. Measure gear-to-body clearance by inserting feeler gauge between a gear tooth and pump body wall. Take measurement directly opposite the point of gear mesh. Rotate gears and measure each tooth in this manner. Replace both gears and idler shaft if not within limits.
  3. If oil pressure relief valve inspection is necessary, oil inlet tube and screen assembly must be removed. Remove cotter pin, spring with retainer and relief valve from pump body. Check valve and bore for binding or wear and repair as necessary. Oil inlet tube and screen assembly must be replaced with a new unit.
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