S10 Pickup, Sonoma 2000-2004
Clean the oil pump components in cleaning solvent.
Dry the components with compressed air.
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
If the oil pump is to be reused, install a NEW oil pump pressure relief valve spring.
During oil pump installation, install a NEW oil pump driveshaft retainer.
Removal & Installation
Remove or disconnect the following:
Be careful not to crack the retainer.
Oil pump and the pickup tube/shaft, if equipped
Extension shaft and retainer from the pump, if necessary for the 2.2L engine
Fig. Exploded view of the oil pump mounting-2.2L