GM Service Manual Online
For 1990-2009 cars only

Exhaust Manifold Replacement Right Side

Removal Procedure


    Object Number: 74059  Size: SH
  1. Disconnect the negative battery cable. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    in General Information.
  2. Raise the vehicle and support. Refer to Lifting and Jacking the Vehicle in General Information.

  3. Object Number: 64015  Size: SH
  4. Remove the RH intermediate exhaust pipe nuts from the exhaust manifold studs.
  5. Remove the HO2S. Refer to Heated Oxygen Sensor Replacement in Engine Controls.
  6. Lower the vehicle.

  7. Object Number: 59633  Size: SH
  8. Remove the following secondary air injection pipe components:
  9. • The bolts
    • The pipe
    • The gasket

    Object Number: 74069  Size: SH
  10. Remove the spark plug wires from the spark plugs.

  11. Object Number: 63171  Size: SH
  12. Remove the oil level indicator from the oil level indicator tube.
  13. Remove the oil level indicator tube bolt.
  14. Remove the oil level indicator tube from the engine.

  15. Object Number: 100175  Size: SH
  16. Remove the exhaust manifold, bolts and gasket.
  17. Discard the gasket and bolts.

Installation Procedure

  1. Install the exhaust manifold. Refer to Exhaust Manifold Installation .

  2. Object Number: 63171  Size: SH
  3. If the O-ring seal is damaged, install a new O-ring on to the oil level indicator tube.
  4. Install the tube to the engine.
  5. Rotate the tube into the proper position.
  6. Install the oil level indicator tube bolt.
  7. Tighten
    Tighten the oil level indicator bolt to 16 N·m (12 lb ft).

  8. Install the oil level indicator to the tube.

  9. Object Number: 74069  Size: SH
  10. Install the spark plug wires to the spark plugs.

  11. Object Number: 59633  Size: SH
  12. Install the following secondary air injection pipe components:
  13. • The gasket
    • The pipe
    • The bolts

    Tighten
    Tighten the AIR pipe bolts to 25 N·m (18 lb ft).

  14. Raise the vehicle and support.
  15. Install the HO2S. Refer to Heated Oxygen Sensor Replacement in Engine Controls.

  16. Object Number: 64015  Size: SH
  17. Install the RH intermediate pipe flange to the exhaust manifold studs.
  18. Install the intermediate pipe flange nuts.
  19. Tighten
    Tighten the intermediate pipe flange nuts to 20 N·m (15 lb ft).

  20. Lower the vehicle.
  21. Connect the negative battery cable.
  22. Tighten
    Tighten the negative battery bolt to 15 N·m (11 lb ft).

Exhaust Manifold Replacement Left

Removal Procedure

Tools Required

J 34730-1A Fuel Pressure Gage


    Object Number: 74059  Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Raise the vehicle and support. Refer to Lifting and Jacking the Vehicle .

  3. Object Number: 64015  Size: SH
  4. Remove the left hand intermediate pipe flange nuts from the exhaust manifold studs.
  5. Remove the heat oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement .
  6. Lower the vehicle.

  7. Object Number: 74075  Size: SH
  8. Remove the engine beauty cover.

  9. Object Number: 74065  Size: SH
  10. Disconnect the generator and coolant temperature sensor electrical connectors.

  11. Object Number: 74089  Size: SH
  12. Remove the accessory drive belt (5) from the generator pulley (6).

  13. Object Number: 74067  Size: SH
  14. Remove the generator mounting bolts.
  15. Remove the generator.

  16. Object Number: 187406  Size: SH
  17. Remove the air injection reaction (AIR) hose from the AIR pipe check valve.

  18. Object Number: 363583  Size: SH
  19. Remove the AIR pipe, bolts, and gasket from the exhaust manifold and reposition.

  20. Object Number: 74069  Size: SH
  21. Remove the spark plug wires from the coils and the spark plugs.
  22. Remove the spark plugs from the cylinder head. Refer to Spark Plug Replacement in Engine Electrical.

  23. Object Number: 363586  Size: SH
  24. Remove the exhaust manifold. Refer to Exhaust Manifold Removal
  25. Discard the gasket and bolts.

Installation Procedure

  1. Install the exhaust manifold. Refer to Exhaust Manifold Installation .
  2. Install the spark plugs to the cylinder head. Refer to Spark Plug Replacement in Engine Electrical.

  3. Object Number: 74069  Size: SH
  4. Install the spark plug wires to the spark plugs and the coils.

  5. Object Number: 363583  Size: SH

    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.

  6. Install the AIR pipe, bolts, and gasket to the exhaust manifold.
  7. Tighten
    Tighten the AIR pipe bolts to 25 N·m (18 lb ft).


    Object Number: 187406  Size: SH
  8. Install the AIR hoses to the AIR pipe check valve.

  9. Object Number: 74067  Size: SH
  10. Install the generator.
  11. Install the generator mounting bolts.
  12. Tighten
    Tighten the generator mounting bolts to 50 N·m (37 lb ft).


    Object Number: 74089  Size: SH
  13. Install the accessory drive belt (5) to the generator pulley (6).

  14. Object Number: 74065  Size: SH
  15. Connect the generator and coolant temperature sensor electrical connectors.

  16. Object Number: 74075  Size: SH
  17. Install the engine beauty cover to the engine.

  18. Object Number: 64015  Size: SH
  19. Raise the vehicle and support.
  20. Install the HO2S sensor. Refer to Heated Oxygen Sensor Replacement .
  21. Install the intermediate pipe flange-to-the exhaust manifold studs.
  22. Install the intermediate pipe flange nuts.
  23. Tighten
    Tighten the intermediate pipe flange nuts to 20 N·m (15 lb ft).

  24. Lower the vehicle.
  25. Connect the negative battery cable.
  26. Tighten
    Tighten the negative battery bolt to 15 N·m (11 lb ft).

  27. Program the Transmitters. Refer to Transmitter Programming/Synchronization in Keyless Entry.