LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1331 (Engine Mechanical (Repair Instructions 2 Of 3) - 5.7L) >> Off-Vehicle Repair Instructions - Part 2 >> Oil Pump Cleaning and Inspection

Oil Pump Cleaning and Inspection

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT:
    • The internal parts of the oil pump assembly are not serviced separately, excluding the spring. If the oil pump components are worn or damaged, replace the oil pump as an assembly.
    • The oil pump pipe and screen are to be serviced as an assembly. Do not attempt to repair the wire mesh portion of the pump and screen assembly.
  1. Clean the parts in solvent.
    2. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  2. Dry the parts with compressed air.
    3. Fig 1: View Of Oil Pump Driven Gear
    GM65060Courtesy of GENERAL MOTORS CORP.
  3. Inspect the oil pump housing and the cover for cracks, excessive wear, scoring, or casting imperfections.
  4. Inspect the oil pump housing-to-engine block oil gallery surface for scratches or gouging.
  5. Inspect the oil pump housing for damaged bolt hole threads.
    6. Fig 2: View Of Oil Pump Pressure Relief Valve Plug
    GM65064Courtesy of GENERAL MOTORS CORP.
  6. Inspect the relief valve plug and plug bore for damaged threads.
  7. Inspect the oil pump internal oil passages for restrictions.
    8. Fig 3: View Of Oil Pump Driven Gear
    GM65060Courtesy of GENERAL MOTORS CORP.
  8. Inspect the drive gear and driven gear for chipping, galling or wear.

    Minor burrs or imperfections on the gears may be removed with a fine oil stone.

    9. Fig 4: View Of Oil Pump Drive Gear
    GM65058Courtesy of GENERAL MOTORS CORP.
  9. Inspect the drive gear splines for excessive wear.
    10. Fig 5: View Of Oil Pump Pressure Relief Valve
    GM65076Courtesy of GENERAL MOTORS CORP.
  10. Inspect the pressure relief valve and bore for scoring or wear.

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

    11. Fig 6: View Of Oil Pump Screen, Nuts & Bolts
    GM64268Courtesy of GENERAL MOTORS CORP.
  11. Inspect the oil pump screen for debris or restrictions.
  12. Inspect the oil pump screen for broken or loose wire mesh.
scientia non olet · About LEMON Manuals