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Oil Pump Drive Cleaning and Inspection

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  1. Clean the oil pump drive in cleaning solvent.
  2. Dry the oil pump drive with compressed air.
  3. Inspect the oil pump drive (1) for the following conditions:
    • Excessive play in the oil pump drive bearing
    • Damage to the oil pump drive clamp bolt hole (2)
    • Damaged gear (3) for the following:
      • Chipping
      • Galling
      • Wear
      • Damage to the oil pump drive shaft tang
  4. Damage to the oil pump drive body (4).
  5. If the oil pump drive is to be reused, lubricate the bearing with clean engine oil, and apply grease to all gear teeth (3).
    6. Fig 1: Inspecting The Pump Drive
    GM635685Courtesy of GENERAL MOTORS CORP.
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