S10 Pickup, Sonoma 2000-2004

Oil Pump



  1. Clean the oil pump components in cleaning solvent.
  3. Dry the components with compressed air.
  5. Inspect the oil pump for the following conditions:

    Scoring on the top of the gears
    Chipping, galling or wear of the gears
    Scoring, damage or casting imperfections to the body
    Damage or scoring of the gear shafts
    Damaged bolt hole threads
    Worn oil pump driveshaft bore
    Damaged or sticking oil pump pressure relief valve. Minor imperfections may be removed with a fine oil stone
    Collapsed or broken oil pump pressure relief valve spring

  7. If the oil pump is to be reused, install a NEW oil pump pressure relief valve spring.
  9. During oil pump installation, install a NEW oil pump driveshaft retainer.

Removal & Installation

  1. Remove or disconnect the following:
    Be careful not to crack the retainer.

    Oil pan
    Oil pump and the pickup tube/shaft, if equipped
    Extension shaft and retainer from the pump, if necessary for the 2.2L engine

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump mounting-2.2L