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Oil Pump: Inspection

  1. Check pump body oil seal for wear, damage or cracks. Replace oil seal (if necessary). Apply grease to oil seal lip when installing.
  2. Check driven gear-to-pump body clearance. Push driven gear against pump body. Measure clearance between driven gear and pump body. See Figure . Replace driven gear if clearance is not within specification. See OIL PUMP CLEARANCE  table.
  3. Measure tip clearance between both gears and crescent shaped part of pump body. See Figure . Replace drive or driven gear if not within specification.
  4. Using feeler gauge and straightedge, measure side clearance between drive and driven gears and pump body. See Figure . Replace drive or driven gear if not within specification.
OIL PUMP CLEARANCE

Application Thickness - In. (mm)
Driven Gear-To-Pump Body Clearance
Standard .0028-.0059 (.070-.150)
Maximum .012 (.30)
Gear-To-Crescent Clearance
Standard .0043-.0055 (.110-.140)
Maximum .012 (.30)
Gear Side Clearance
Standard .0008-.0020 (.020-.050)
Maximum .0039 (.100)
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