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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 5.3L) >> Repair Instructions - Off Vehicle >> Oil Pan Cleaning and Inspection

Oil Pan Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Oil Pan, Plug & O-Ring
    GM1875884Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: 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 filter fitting and bypass valve, as required. Refer to Oil Filter Removal .
  2. Remove the drain plug (430) and O-ring (429).
    3. CAUTION: Refer to Safety Glasses Caution .
  3. Clean the oil pan in solvent. Be sure to thoroughly clean all of the oil passages and recesses of the pan.
  4. Dry the oil pan with compressed air.
  5. Inspect the oil pan for the following conditions:
    • Damaged gasket surfaces
    • Restrictions within the oil passages of the pan
    • Threaded bolt holes for damage
    6. Fig 2: View Of Valve Lifter Oil Pressure Relief Valve
    GM1411956Courtesy of GENERAL MOTORS CORP.
  6. Inspect the active fuel management oil pressure relief valve for proper operation.

    Lightly depress the valve (2). The valve spring (1) should seat the valve to the proper closed position.

    7. Fig 3: Locating Valve Lifter Oil Pressure Relief Valve
    GM1602761Courtesy of GENERAL MOTORS CORP.
  7. The valve (455) is press-fit in the oil pan and is serviceable separately.
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