GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Remove the hood. Refer to Hood Replacement in Body Front End.
  2. Remove the battery. Refer to Battery Replacement in Engine Electrical.
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  4. Disconnect the vacuum brake booster hose from the vacuum connections and position aside.
  5. Disconnect the fuel feed and return lines from the fuel rail and secure to the air inlet grille. Refer to Metal Collar Quick Connect Fitting Service or Plastic Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
  6. Remove the evaporative emission (EVAP) canister purge valve solenoid and secure the hose to the air inlet grill. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.8 L.

  7. Object Number: 522271  Size: SH
  8. Push the lock release and remove the cruise control cable from the throttle body bracket and lever.
  9. Disconnect the electrical connector from the cruise control module.

  10. Object Number: 141846  Size: SH
  11. Remove the retaining nuts (2) and the cruise control module (1) from the mounting studs.
  12. Caution: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.

    In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.

  13. Remove the accelerator control cable. Refer to Cruise Control Cable Replacement in Cruise Control.
  14. Remove the drive belt. Refer to Drive Belt Replacement .
  15. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  16. Object Number: 722956  Size: SH
  17. Remove the bolt securing both the battery negative cable and the engine harness ground lead to the engine block.

  18. Object Number: 732534  Size: SH
  19. Disconnect the wiring harness connectors from the following components:
  20. • The A/C compressor clutch (1)
    • The A/C pressure sensor (2)
    • The knock sensor #1 (3)
    • The engine coolant block heater (4)
    • The oil level sensor (7)

    Object Number: 732535  Size: SH
  21. Disconnect the wiring harness from the harness clip at the rear of the A/C compressor.
  22. Remove the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65-E.
  23. Remove the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  24. Remove the bolts securing the flywheel to the torque converter.

  25. Object Number: 732536  Size: SH
  26. Disconnect and secure the following wiring harness electrical connectors to the cowl:
  27. • The knock sensor #2, located behind the right exhaust manifold
    • The oil pressure sensor (2)
    • The vehicle speed sensor (VSS) (3)

    Object Number: 732537  Size: SH
  28. Remove the 2 bolts securing the transaxle brace to the transaxle.

  29. Object Number: 703000  Size: SH

    Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.

  30. Remove the 2 nuts attaching the exhaust manifold pipe to the right exhaust manifold.
  31. Remove the exhaust manifold pipe from the right exhaust manifold studs, allowing it to rest on top of the power steering gear heat shield.
  32. Remove the gasket. Do not reuse the gasket.

  33. Remove the right front fascia extension. Refer to Front Bumper Fascia Extension Replacement in Bumpers.

  34. Object Number: 247295  Size: SH
  35. Remove the front A/C compressor mounting nuts.
  36. Remove the rear A/C compressor mounting bolt.
  37. Slide the A/C compressor forward off of the mounting studs and allow the compressor to rest on top of the engine frame.
  38. Lower the vehicle.

  39. Object Number: 732538  Size: SH
  40. Remove the bolt securing the powertrain control module (PCM) ground located at the left front cylinder head.

  41. Object Number: 732539  Size: SH
  42. Disconnect the wiring harness electrical connectors from the following components on the left side of the engine:
  43. • The fuel injectors
    • The ignition harness
    • The boost control solenoid (L67 only)
    • The engine coolant temperature (ECT) sensor
    • The throttle position (TP) sensor
    • The idle air control (IAC) valve
    • The mass air flow (MAF) sensor

    Object Number: 732540  Size: SH
  44. Disconnect the wiring harness connectors from the following components on the right side of the engine:
  45. • Fuel injectors
    • Exhaust gas recirculation (EGR) valve
    • Manifold absolute pressure (MAP) sensor
    • Heated oxygen sensor (HO2S)
    • Secondary air injection (AIR) solenoid, if equipped with NC8
    • Generator
  46. Secure the engine wiring harness rearward to the air inlet grille.
  47. Remove the generator. Refer to Generator Replacement in Engine Electrical.
  48. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.8L.
  49. Install the engine support fixture. Refer to Engine Support Fixture .

  50. Object Number: 464479  Size: SH
  51. Remove the two front power steering pump mounting bolts.
  52. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  53. Remove the side power steering pump mounting bolt.
  54. Position the power steering pump against the cowl, allowing it to rest on top of the transaxle housing.
  55. Remove the right engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side .

  56. Object Number: 732542  Size: SH
  57. Remove the right lower engine to transaxle mounting bolt (1).
  58. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling
  59. Lower the vehicle.

  60. Object Number: 732545  Size: SH
  61. Position the J 38185 to the clamp in order to remove the radiator inlet hose from the water pump.

  62. Object Number: 732548  Size: SH
  63. Position the J 38185 to the clamp in order to remove the radiator outlet hose from the thermostat housing.

  64. Object Number: 420668  Size: SH
  65. Remove the heater hoses from the drive belt tensioner fittings.
  66. Using a block of wood between a floor jack and the transaxle, support the transaxle at the pan.
  67. Remove the engine support fixture. Refer to Engine Support Fixture .

  68. Object Number: 732549  Size: SH
  69. Install an engine lift chain to the engine lift brackets and attach to an engine lift devise.
  70. Remove the remaining engine to transaxle mounting bolts.
  71. Important: Ensure clearance is maintained between the engine and the following:

       • A/C accumulator
       • A/C accumulator hose
       • A/C compressor
       • A/C compressor hose
       • Engine wiring electrical harness
       • Vacuum brake booster

  72. Carefully raise the engine from the engine compartment.
  73. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .

  74. Object Number: 732550  Size: SH
  75. Remove the 2 bolts securing the transaxle brace to the engine.
  76. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement in Engine Exhaust.

Installation Procedure


    Object Number: 732550  Size: SH
  1. Loosely install the 2 bolts securing the transaxle brace to the engine. Do not tighten at this time.
  2. Install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement in Engine Exhaust.

  3. Object Number: 732549  Size: SH

    Important: Ensure clearance is maintained between the engine and the following:

       • The A/C accumulator
       • The A/C accumulator hose
       • The A/C compressor
       • The A/C compressor hose
       • The engine wiring electrical harness
       • The vacuum brake booster

  4. Carefully lower the engine into the engine compartment.
  5. Align the engine dowels to the transaxle cover.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the 5 upper engine to transaxle mounting bolts.
  8. Tighten
    Tighten the engine to transaxle mounting bolts to 75 N·m (55 lb ft).

  9. Remove the engine lift chain from the engine lift brackets.
  10. Install the engine support fixture. Refer to Engine Support Fixture .
  11. Remove the support jack from under the transaxle.

  12. Object Number: 420668  Size: SH
  13. Connect the heater hoses to the drive belt tensioner fittings.

  14. Object Number: 732548  Size: SH
  15. Position the J 38185 to the clamp in order to connect the radiator outlet hose to the thermostat housing.

  16. Object Number: 732545  Size: SH
  17. Position the J 38185 to the clamp in order to connect the radiator inlet hose to the water pump.
  18. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  19. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  20. Object Number: 732542  Size: SH
  21. Install the right lower engine to transaxle mounting bolt (1).
  22. Tighten
    Tighten the engine to transaxle mounting bolt to 75 N·m (55 lb ft).

  23. Install the right engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side .

  24. Object Number: 464479  Size: SH
  25. Position the power steering pump to the engine.
  26. Loosely install the side power steering pump mounting bolt. Do not tighten at this time.
  27. Lower the vehicle.
  28. Install the 2 front power steering pump mounting bolts.
  29. Tighten
    Tighten the power steering pump mounting bolts to 27 N·m (20 lb ft).

  30. Remove the engine support fixture. Refer to Engine Support Fixture .
  31. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.8L.
  32. Install the generator. Refer to Generator Replacement in Engine Electrical.

  33. Object Number: 732540  Size: SH
  34. Position the engine wiring electrical harness to the engine.
  35. Connect the wiring harness electrical connectors to the following components on the right side of the engine:
  36. • The fuel injectors
    • The EGR valve
    • TheMAP sensor
    • The HO2S
    • The AIR solenoid, if equipped with NC8
    • The generator

    Object Number: 732539  Size: SH
  37. Connect the wiring harness electrical connectors to the following components on the left side of the engine:
  38. • The fuel injectors
    • The ignition harness
    • The boost control solenoid (L67 only)
    • The ECT sensor
    • The TP sensor
    • The IAC valve
    • The MAF sensor

    Object Number: 732538  Size: SH
  39. Install the bolt securing the PCM ground to the left front cylinder head.
  40. Tighten
    Tighten the PCM ground lead bolt to 50 N·m (37 lb ft).

  41. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  42. Tighten the side power steering pump mounting bolt previously installed in step 14.
  43. Tighten
    Tighten the power steering pump mounting bolt to 27 N·m (20 lb ft).


    Object Number: 247295  Size: SH
  44. Slide the A/C compressor rearward over the mounting studs.
  45. Install the rear A/C compressor mounting bolt.
  46. Install the front A/C compressor mounting nuts.
  47. Tighten
    Tighten the A/C compressor mounting fasteners to 50 N·m (37 lb ft).


    Object Number: 703000  Size: SH
  48. Place a NEW exhaust manifold pipe gasket over the right exhaust manifold studs.
  49. Position the exhaust manifold pipe to the right exhaust manifold.
  50. Install the 2 nuts attaching the exhaust manifold pipe to the right exhaust manifold.
  51. Tighten
    Tighten the exhaust manifold pipe nuts to 40 N·m (30 lb ft).


    Object Number: 732537  Size: SH
  52. Install the 2 bolts securing the transaxle brace to the transaxle.
  53. Tighten the 2 bolts previously installed in step 1.

    Tighten
    Tighten the transaxle brace bolts to 65 N·m (48 lb ft).


    Object Number: 732536  Size: SH
  54. Connect the wiring harness electrical connectors to the following components
  55. • The knock sensor #2, located behind the right exhaust manifold
    • The oil pressure sensor (2)
    • The VSS (3)
  56. Install the bolts securing the flywheel to the torque converter.
  57. Tighten
    Tighten the flywheel to torque converter bolts to 63 N·m (46 lb ft).

  58. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  59. Install the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65-E.

  60. Object Number: 732535  Size: SH
  61. Connect the wiring harness to the harness clip at the rear of the A/C compressor.

  62. Object Number: 732534  Size: SH
  63. Connect the wiring harness connectors to the following components:
  64. • A/C compressor clutch (1)
    • A/C pressure sensor (2)
    • Knock sensor #1 (3)
    • Engine coolant block heater (4)
    • Oil level sensor (7)

    Object Number: 722956  Size: SH
  65. Install the bolt in order to secure both the battery negative cable and the engine harness ground lead to the engine block.
  66. Tighten
    Tighten the battery negative cable to engine block bolt to 25 N·m (18 lb ft).

  67. Install the right front fascia extension. Refer to Front Bumper Fascia Extension Replacement in Bumpers.
  68. Lower the vehicle.
  69. Install the drive belt. Refer to Drive Belt Replacement .
  70. Caution: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.

    In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.

  71. Remove the accelerator control cable. Refer to Cruise Control Cable Replacement in Cruise Control.

  72. Object Number: 141846  Size: SH
  73. Position the cruise control module (1) to the mounting studs on the cowl.
  74. Install the 2 cruise control module bracket retaining nuts (2).

    Tighten
    Tighten the cruise control module bracket retaining nuts to 9 N·m (80 lb ft).

  75. Connect the electrical connector to the cruise control module.

  76. Object Number: 522271  Size: SH
  77. Install the cruise control cable to the throttle body lever.
  78. Slide the cruise control cable fully into the throttle body bracket until it snaps into place.
  79. Install the EVAP canister purge valve solenoid. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.8L.
  80. Connect the fuel feed and return lines to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service or Plastic Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
  81. Connect the vacuum brake booster hose to the vacuum connections.
  82. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  83. Install the battery. Refer to Battery Replacement in Engine Electrical.
  84. Install the hood. Refer to Hood Replacement in Body Front End.
  85. Fill the engine oil. Refer to Engine Oil and Oil Filter Replacement .

Engine Final Test and Inspection

Complete the following procedure after the engine is installed in the vehicle:

  1. With the ignition OFF or disconnected, crank the engine several times. Listen for any unusual noises or evidence that any parts are binding.
  2. Start the engine and listen for abnormal conditions.
  3. Check the vehicle oil pressure gage or light and confirm that the engine has acceptable oil pressure.
  4. Run the engine at approximately 1,000 RPM until the engine reaches normal operating temperature.
  5. While the engine continues to idle raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Inspect for oil, coolant and exhaust leaks while the engine is idling.
  7. Lower the vehicle.
  8. Perform the crankshaft position (CKP) variation learn. Refer to Crankshaft Position System Variation Learn in Engine Controls - 3.8L.
  9. Perform a final inspection for the proper engine oil and coolant levels.
  10. Road test the vehicle.