Oil Pump Cleaning and Inspection 7.0L

Important: 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.

1. Clean the parts in solvent.

Caution: Refer to Safety Glasses Caution in the Preface section.

2. Dry the parts with compressed air.
3. Inspect the oil pump housings (413, 456) and the cover (409) for cracks, excessive wear, scoring, or casting imperfections.
4. Inspect the primary pump housing-to-engine block oil gallery surface for scratches or gouging.
5. Inspect the primary pump housing (413) for damaged bolt hole threads.
6. Inspect the relief valve plug (416) and plug bore for damaged threads.
7. Inspect the oil pump internal oil passages for restrictions.
8. 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.

9. Inspect the drive gear splines for excessive wear.
10. Inspect the pressure relief valve (414) and bore for scoring or wear.

The valve must move freely in the bore, with no restrictions.