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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Engine Mechanical) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the hood. Refer to Hood Replacement .
    2. Fig 1: Hood Latch Fasteners
    GM820669Courtesy of GENERAL MOTORS CORP.
  2. Remove hood latch (1) from cowl.
  3. Leaving the A/C compressor lines connected remove the condenser mounting bolts and secure to frame rail.
  4. Remove the upper radiator support. Refer to Radiator Support Replacement .
    5. Fig 2: View Of Inlet Hose & Water Pump
    GM659418Courtesy of GENERAL MOTORS CORP.
  5. Reposition the radiator inlet hose clamp at the water pump.
  6. Remove the radiator inlet hose from the water pump.
    7. Fig 3: View Of Radiator Outlet Hose
    GM308983Courtesy of GENERAL MOTORS CORP.
  7. Reposition the radiator outlet hose clamp at the water pump.
  8. Remove the radiator outlet hose from the water pump.
  9. Remove the heater hoses. Refer to Heater Inlet Hose Replacement and Heater Outlet Hose Replacement .
    10. Fig 4: View Of Top Engine Cover
    GM665886Courtesy of GENERAL MOTORS CORP.
  10. Loosen the intake manifold sight shield bolt.
  11. Remove the sight shield from the retainer.
    12. Fig 5: Identifying Purge Solenoid Electrical Connector, Wiring Harness Nut & Generator Electrical Connector
    GM663672Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the following electrical connectors:
    • Evaporative emissions (EVAP) canister purge solenoid (1)
    • Generator (3)
  13. Remove the harness bracket nut (2) in order to remove the engine harness from the intake manifold.
    14. Fig 6: View Of Vent Inlet Hose At Throttle Body
    GM659465Courtesy of GENERAL MOTORS CORP.
  14. Remove the radiator vent inlet hose from the throttle body.
    15. Fig 7: View Of Generator Cable & Nut
    GM395686Courtesy of GENERAL MOTORS CORP.
  15. Remove the generator cable from the generator, perform the following:
    1. Slide the boot down revealing the terminal stud.
    2. Remove the generator cable nut from the terminal stud.
    3. Remove the generator cable.
    16. Fig 8: View Of Main Coil Harness & Fuel Injector Electrical Connectors (Left Side)
    GM679597Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the main coil harness (2) and fuel injector (3) electrical connectors on the left side.
    17. Fig 9: Identifying Right Side Main Electrical Connectors
    GM1235686Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the following electrical connectors:
    • Main coil harness (4)
    • Fuel injectors (3)
    • Electronic throttle control (ETC) (2)
    18. Fig 10: View Of MAP Sensor & Knock Sensor Electrical Connectors
    GM679510Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the manifold absolute pressure (MAP) sensor (1) and knock sensor (2) electrical connectors.
    19. Fig 11: Coolant Temperature Sensor & Electronic Variable Orifice Switch Electrical Connectors
    GM684221Courtesy of GENERAL MOTORS CORP.
  19. Remove the harness ground bolt.
  20. Reposition the harness ground and negative battery cable from the block.
  21. Disconnect the following electrical connectors:
    • Coolant temperature sensor (1)
    • Electronic variable orifice switch (2)
    22. Fig 12: View Of Oil Pressure Sensor & CMP Sensor Connectors
    GM684224Courtesy of GENERAL MOTORS CORP.
  22. Remove the harness ground bolt at the right rear of the engine block.
  23. Reposition the harness ground from the block.
  24. Remove the harness ground bolt at the left rear of the engine block.
  25. Reposition the harness ground, and engine ground strap from the block.
  26. Disconnect the following electrical connectors:
    • Oil pressure sensor (1)
    • Camshaft position (CMP) sensor (2)
  27. Unclip all of the engine harness clips from the engine.
    28. Fig 13: View Of Battery Cable Junction Block
    GM662505Courtesy of GENERAL MOTORS CORP.
  28. Remove the battery cable junction block from the junction block bracket.
    29. Fig 14: View Of EVAP Purge Solenoid Vent Tube
    GM372717Courtesy of GENERAL MOTORS CORP.
  29. Remove the EVAP purge solenoid vent tube, perform the following:
    • Remove the EVAP tube end (2) from the solenoid (1).
    • Remove the EVAP tube end (3) from the vapor pipe.
  30. Disconnect the fuel pipes. Refer to Metal Collar Quick Connect Fitting Service or Plastic Collar Quick Connect Fitting Service .
  31. Raise the vehicle.
    32. Fig 15: View Of RH Side Engine Electrical Connectors
    GM662991Courtesy of GENERAL MOTORS CORP.
  32. Disconnect the following electrical connectors:
    • The crankshaft position (CKP) sensor (1)
    • The engine oil level sensor (6)
    • The coolant heater, if equipped
    33. Fig 16: View Of Positive Battery Cable, Channel & Bolt
    GM662508Courtesy of GENERAL MOTORS CORP.
  33. Remove the battery cable channel bolt.
  34. Slide the channel pin out of the oil pan tab.
  35. Gather all branches of the engine wiring harness and reposition off to the side.
  36. Lower the vehicle.
    37. Fig 17: View Of Generator Bracket & Bolts
    GM310813Courtesy of GENERAL MOTORS CORP.
  37. Remove the rear power steering pump-to-engine block bolt.
  38. Remove the generator bracket mounting bolts.
  39. Position the bracket aside.
  40. Remove the ignition coil, as required for the proper fit of the J 41798  before lifting the engine. See Special Tools . Refer to Ignition Coil Replacement .
    41. Fig 18: View Of J 41798
    GM309151Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  41. Install the J 41798  to the cylinder heads. See Special Tools .

    Tighten: 

    • Tighten the M8 engine lift bracket bolts to 25 N.m (18 lb ft).
    • Tighten the M10 engine lift bracket bolts to 50 N.m (37 lb ft).

    42. Fig 19: View Of Engine Mount-To-Engine Mount Bracket
    GM307275Courtesy of GENERAL MOTORS CORP.
  42. Remove the left and right engine mount-to-engine mount bracket bolts.
  43. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
    44. Fig 20: Engine Protection Shield
    GM794711Courtesy of GENERAL MOTORS CORP.
  44. Remove the engine shield bolts and shield.
    45. Fig 21: Catalytic Converter Guard
    GM794712Courtesy of GENERAL MOTORS CORP.
  45. Remove the ladder shields bolts and plate.
  46. Drain the engine oil.
    47. Fig 22: Flywheel-To-Torque Converter Bolts
    GM9096Courtesy of GENERAL MOTORS CORP.
  47. Remove the flywheel to torque converter bolts.
    48. Fig 23: View Of Oil Level Indicator Tube Nut
    GM396797Courtesy of GENERAL MOTORS CORP.
  48. Remove the transmission oil level indicator tube nut.
    49. Fig 24: View Of Oil Level Indicator Tube & Seal
    GM396798Courtesy of GENERAL MOTORS CORP.
  49. Remove the transmission oil level indicator tube.
    50. Fig 25: Identifying Stud & Bolt Securing Transmission To Engine (Right Side)
    GM394448Courtesy of GENERAL MOTORS CORP.
  50. Remove the transmission bolt and stud on the right side.
    51. Fig 26: Identifying Six Studs & One Bolt Securing Transmission To Engine
    GM394446Courtesy of GENERAL MOTORS CORP.
  51. Remove the automatic transmission bolt/studs.
  52. Separate the engine from the automatic transmission.

    Install the J 21366  . See Special Tools .

  53. Lower the vehicle.
  54. Install an engine hoist to the J 41798  . See Special Tools .
  55. Install a floor jack under the transmission for support.
    NOTE: Use care while moving the engine assembly in order to avoid breaking the MAP sensor locating tabs. Broken MAP sensor tabs may result in decreased engine performance.
  56. Remove the engine.
  57. Install the engine to an engine stand.
  58. Remove the engine hoist.
    59. Fig 27: View Of J 41798
    GM309151Courtesy of GENERAL MOTORS CORP.
  59. Remove the J 41798  . See Special Tools .
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