GM Service Manual Online
For 1990-2009 cars only

    Object Number: 635685  Size: SH

    Caution: Wear safety glasses in order to avoid eye damage.

  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:
  4. • Excessive play in the oil pump drive bearing
    • Damage to the oil pump drive clamp bolt hole (2)
    • Damaged gear (3) for the following conditions:
       - Chipping
       - Galling
       - Wear
       - Damage to the oil pump drive shaft tang
  5. Damage to the oil pump drive body (4).
  6. If the oil pump drive is to be used again, lubricate the bearing with clean engine oil and apply grease to all gear teeth (3).