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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 319 (Engine Cooling System) >> Repair Instructions >> Engine Oil Cooler Hose/Pipe Replacement >> Removal Procedure

Removal Procedure

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The optional oil cooler is either an integral part of the radiator or a separate unit placed in front of the radiator. The cooler lines and hoses are serviceable.

    Fig 1: Locating Quick Connect Fitting
    GM1702524Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the engine oil cooler quick connect fittings. Refer to Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  2. If equipped with regular production option (RPO) L76 (6.0L) engine, perform the following.
    1. Open the oil cooler hose clip located on the lower fan shroud.
    2. Remove the oil cooler hoses from the clip.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
    4. Fig 2: Oil Cooler Hoses And Clips
    GM1702526Courtesy of GENERAL MOTORS CORP.
  4. If equipped with RPO LY6 (6.0L) engine, remove the oil cooler hoses from the clip.
  5. Place a jack or utility stands at the rear of the vehicle.
  6. If equipped, remove the engine protection shield. Refer to Engine Shield Replacement .
  7. If equipped, remove the oil pan skid plate, if equipped. Refer to Oil Pan Skid Plate Replacement (1500 with RPO NZZ) , Oil Pan Skid Plate Replacement (2500/3500 with RPO NZZ) .
    8. Fig 3: Differential Carrier Nuts
    GM1698067Courtesy of GENERAL MOTORS CORP.
  8. For both 1500 and 2500 series, support the front differential carrier with a suitable adjustable jack.
  9. For 1500 series vehicles, remove the differential carrier right side nuts.
    10. Fig 4: Differential Carrier Bolts
    GM1698068Courtesy of GENERAL MOTORS CORP.
  10. Remove the differential carrier left side bolts.
  11. Lower the differential carrier.
  12. For 2500 series vehicles, remove the differential carrier right side nuts.
    13. Fig 5: Differential Carrier Lower Mounting Bolt
    GM834278Courtesy of GENERAL MOTORS CORP.
  13. Remove the differential carrier upper mounting bolt and nut.
  14. Remove the differential carrier lower mounting bolt and nut.
    15. Fig 6: Oil Cooler Hose Bracket And Adapter Bolts
    GM1702199Courtesy of GENERAL MOTORS CORP.
  15. If equipped with RPO L76 (6.0L) engine, perform the following:
    1. Lower the differential carrier.
    2. Remove the oil cooler hose adapter bolts (2).
    3. Remove the oil cooler hose assembly and gasket. Discard the gasket.
    4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.
    16. Fig 7: Oil Cooler Hose Bracket And Adapter Bolts
    GM1702200Courtesy of GENERAL MOTORS CORP.
  16. If equipped with RPO LY6 (6.0L) engine, perform the following:
    1. Remove the oil cooler hose bracket bolt. (1)
    2. Remove the oil cooler hose adapter bolts. (2)
    3. Remove the oil cooler hose assembly. Discard the gasket.
    4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.
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