Oil Pump Cleaning and Inspection (6.2L LS9)
- Clean the parts in solvent.
- Dry the parts with compressed air.
- Inspect the oil pump housings (413, 456) and the cover (409) for cracks, excessive wear, scoring, or casting imperfections.
- Inspect the primary pump housing-to-engine block oil gallery surface for scratches or gouging.
- Inspect the primary pump housing (413) for damaged bolt hole threads.
- Inspect the relief valve plug (416) and plug bore for damaged threads.
- Inspect the oil pump internal oil passages for restrictions.
- Inspect the drive gears (410) and driven gears (412) for chipping, galling or wear.
Minor burrs or imperfections on the gears may be removed with a fine oil stone.
- Inspect the drive gear splines for excessive wear.
- Inspect the relief valve spring (415) for cracks, scratches, and wear to coils in spring.
- Inspect the pressure relief valve (414) and bore for scoring or wear.
The valve must move freely in the bore, with no restrictions.
NOTE:
The internal parts of the oil pump assembly are not serviced separately. If the oil pump components are worn or damaged, replace the oil pump as an assembly.
WARNING:
Refer to Safety Glasses Warning .