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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 271 (Engine Mechanical - 4.8L, 5.3L, 6.0L Or 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Oil Pan Cleaning and Inspection

Oil Pan Cleaning and Inspection

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    Fig 1: View Of Oil Filter Fitting
    GM1658160Courtesy of GENERAL MOTORS CORP.
  1. Remove the oil filter fitting (438), as required.
    2. Fig 2: View Of Oil Pressure Relief Valve Components
    GM1658301Courtesy of GENERAL MOTORS CORP.
  2. Remove the active fuel management oil pressure relief valve (455) and washer.
  3. Inspect the 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.
    4. Fig 3: View Of Oil Level Sensor & O-Ring
    GM1658296Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil level sensor (727) and O-ring (728).
    5. Fig 4: View Of Baffle & Bolts
    GM1658299Courtesy of GENERAL MOTORS CORP.
  5. Remove the bolts (427) and baffle (428).
    6. Fig 5: View Of Oil Pan Cover, Bolts & Gasket
    GM1658297Courtesy of GENERAL MOTORS CORP.
  6. Remove the oil pan cover (434), bolts (435), and gasket (433).
  7. Clean the oil pan in solvent.
    8. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
  8. Dry the oil pan with compressed air.
    9. Fig 6: View Of Oil Pan Inspection Points
    GM1658303Courtesy of GENERAL MOTORS CORP.
  9. Inspect the oil pan for the following conditions:
    • Damaged gasket surfaces (1)
    • Restrictions within the oil passages (2) of the pan
    • Damaged oil filter seal surface (3)
    • Threaded oil level sensor hole (4) for damage
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