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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1566 (Engine Mechanical (Repair Instructions 2 Of 3) - 5.7L) >> Off-Vehicle Repair Instructions - Part 2 >> Oil Pan Cleaning and Inspection

Oil Pan 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.
    Fig 1: Oil Level Sensor & Oil Pan
    GM63114Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Do not use the oil pan gaskets again. Install NEW gaskets during assembly.
    • When installing a NEW oil pan gasket, it is not necessary to install the rivets that retain the NEW gasket to the pan.
  1. Remove the oil level sensor from the pan.
    2. Fig 2: Oil Temperature Sensor, Oil Pan Cover, Bolts, And Gasket
    GM64842Courtesy of GENERAL MOTORS CORP.
  2. Remove the oil temperature sensor, oil pan cover, gasket, and bolts.
    3. Fig 3: Oil Pan Drain Plug & O-Ring Seal
    GM74223Courtesy of GENERAL MOTORS CORP.
  3. Remove the oil pan drain plug and O-ring seal.
    4. Fig 4: Drilling Out Oil Pan Gasket Retaining Rivets
    GM1272840Courtesy of GENERAL MOTORS CORP.
  4. Drill (2) out the oil pan gasket retaining rivets (1), if required.
  5. Remove the oil pan gasket (426).
  6. Discard the gasket.
    7. Fig 5: Oil Pan - Lower - Bolts
    GM414783Courtesy of GENERAL MOTORS CORP.
  7. Remove the oil pan - lower - bolts (1-15).
    8. Fig 6: Oil Pan - Upper, Gasket, Oil Pan - Lower & Bolts
    GM1272836Courtesy of GENERAL MOTORS CORP.
  8. Separate the oil pan (400) - upper, gasket (453), oil pan (454) - lower, and bolts (455).
  9. Discard the oil pan gasket.
    10. Fig 7: Oil Pan - Lower - To Crankshaft Oil Deflector, Crankshaft, Or Other Internal Engine Components
    GM414781Courtesy of GENERAL MOTORS CORP.
  10. Clean the oil pan halves in solvent. Be sure to thoroughly clean all of the oil passages and recesses of dirt and debris.
  11. Clean the oil pan gasket surfaces. Refer to Replacing Engine Gaskets .
    12. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  12. Dry the oil pan with compressed air.
  13. Inspect the gasket sealing surfaces for excessive scratches or gouging. Refer to Replacing Engine Gaskets .
    14. Fig 8: Oil Level Sensor & Oil Pan
    GM63114Courtesy of GENERAL MOTORS CORP.
  14. Inspect the oil pan oil level sensor seal surface damage.

    The O-ring seal of the sensor may be used again if it is not cut or damaged.

    15. Fig 9: Oil Pan Drain Plug & O-Ring Seal
    GM74223Courtesy of GENERAL MOTORS CORP.
  15. Inspect the oil pan drain plug and threaded drain hole for damaged threads.

    The drain plug O-ring seal may be used again if it is not cut or damaged.

    16. Fig 10: Oil Temperature Sensor, Oil Pan Cover, Bolts, And Gasket
    GM64842Courtesy of GENERAL MOTORS CORP.
  16. Inspect the oil filter and pan cover sealing surface for scratches or gouging.
  17. Inspect the oil passages for restrictions.
    18. Fig 11: View Of Oil Filter Fitting & Bypass Valve
    GM1272831Courtesy of GENERAL MOTORS CORP.
  18. Inspect the oil filter fitting (438) for a loose fit or damaged threads.
  19. Inspect the oil filter bypass valve (436) for proper operation.

    Lightly push the bypass valve into the bore. The valve spring should seat the valve to the proper position.

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