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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 5.7L (LS6)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pan Cleaning and Inspection

Oil Pan Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
  • Do not use the oil pan cover or oil transfer tube gaskets again. Install NEW gaskets during assembly.
  • Do not use the oil pan to engine block gasket again. Install a NEW gasket 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. Drill (2) out the oil pan gasket retaining rivets (1), if required.
    Fig 1: Drilling Out Oil Pan Gasket Retaining Rivets
    GM1272840Courtesy of GENERAL MOTORS CORP.
  2. Remove the gasket (426) from the oil pan.
    3. Fig 2: Locating Oil Cover, Gasket, Bolts & Oil Temperature Sensor
    GM1199304Courtesy of GENERAL MOTORS CORP.
  3. Remove the oil temperature sensor (732).
  4. Remove the oil pan cover (434), bolts (435) and gasket (433).
    5. Fig 3: View Of Oil Pan Baffle & Bolts
    GM1199311Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil pan baffle and bolts.
    6. Fig 4: View Of Oil Pan Drain Plug
    GM1199280Courtesy of GENERAL MOTORS CORP.
  6. Remove the oil pan drain plug.
    7. Fig 5: View Of Oil Pan Baffle & Bolts
    GM1199311Courtesy of GENERAL MOTORS CORP.
  7. Clean the oil pan in solvent. Be sure to thoroughly clean all of the oil passages and recesses of the pan.
  8. Clean the oil pan gasket surfaces.

    Refer to Replacing Engine Gaskets .

    9. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  9. Dry the oil pan with compressed air.
  10. Inspect the oil pan for the following conditions:
    • Gasket sealing surfaces for excessive scratches or gouging
    • 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

    • Oil filter sealing surface for scratches or gouging
    • Oil passages for restrictions
    11. Fig 6: View Of Oil Filter Fitting & Bypass Valve
    GM1272831Courtesy of GENERAL MOTORS CORP.
  11. Inspect the oil filter fitting (438) for a loose fit or damaged threads.
  12. 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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