GM Service Manual Online
For 1990-2009 cars only

Cleaning Procedure

  1. Clean the oil pump components with non-corrosive solvent.
  2. Caution: Refer to Safety Glasses Caution in the Preface section.

  3. Dry the oil pump components with compressed air.

Inspection Procedure


    Object Number: 1039930  Size: SH

    Important: The internal parts of the oil pump are not serviced separately. If wear or damage is noted, replace the entire pump assembly.

  1. Inspect the oil pump body for cracks, scoring, casting imperfections and damaged threads.

  2. Object Number: 1039979  Size: SH
  3. Inspect the oil pump cover for cracks, scoring and casting imperfections.

  4. Object Number: 1040034  Size: SH
  5. Inspect the oil pump driven gear for chipping, galling or wear.

  6. Object Number: 1040076  Size: SH
  7. Inspect the oil pump drive gear for chipping, galling or wear.

  8. Object Number: 1040161  Size: SH
  9. Inspect the oil pump drive spacer for chipping, galling or wear.

  10. Object Number: 1040213  Size: SH
  11. Inspect the oil pump relief components for embedded particles and/or damage.