GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Aurora 🢒 Engine 🢒 Engine Mechanical - 3.5L 🢒 Exhaust Manifold Installation - Right Side

Exhaust Manifold Installation - Right Side w/o RPO NC1 or NF7


    Object Number: 281914 Size: SH

    Important: Align the threaded hole in the engine block with the hole labeled R (1) on the right coolant heater.

  1. Install the right engine coolant heater.

    2. Object Number: 281918 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.

  2. Install the right engine coolant heater bolt.

    3. Tighten
    Tighten the right coolant heater bolt to 9 N·m (80 lb in).


    Object Number: 483079 Size: SH
  3. Install the knock sensor.

    4. Tighten
    Tighten the knock sensor to 15 N·m (11 lb ft).


    Object Number: 483083 Size: SH
  4. Install the wiring harness bracket.
  5. Install the wiring harness bracket bolt.

    6. Tighten
    Tighten the wiring harness bracket bolt to 25 N·m (18 lb ft).


    Object Number: 483127 Size: SH
  6. Install the oil pressure switch.

    7. Tighten
    Tighten the oil pressure switch to 10 N·m (89 lb in).


    Object Number: 235257 Size: SH
  7. Install the ECT sensor.

    8. Tighten
    Tighten the ECT sensor to 20 N·m (15 lb ft).


    Object Number: 483099 Size: SH
  8. Install the engine wiring harness.
  9. Connect the engine wiring harness to the ECT sensor.

    10. Object Number: 483108 Size: SH
  10. Install the engine wiring harness to the lower crankcase.

    11. Object Number: 483110 Size: SH
  11. Connect the engine wiring harness to the knock sensor.
  12. Install the engine wiring harness to the wiring harness bracket (1).

    13. Object Number: 234122 Size: SH

    Important: Installing the exhaust manifold/crossover pipe assembly with the engine on an engine stand is difficult. Remove the engine from the engine stand and install the exhaust manifold with the engine properly supported on the floor or on a bench.

    Important: You MUST use a new exhaust manifold gasket when installing the exhaust manifold.

  13. Position a new exhaust manifold gasket onto the right exhaust manifold.
  14. Install the exhaust manifold bolts.
  15. Place the right exhaust manifold, exhaust manifold gasket and bolts as an assembly in position on the right cylinder head.
  16. Install the exhaust manifold bolts into the right cylinder head.

    17. Tighten
    Tighten the right exhaust manifold bolts to 25 N·m (18 lb ft).


    Object Number: 235262 Size: SH
  17. Coat the oxygen sensor threads with anti-seize such as GM P/N 12377953 or equivalent.
  18. Install the oxygen sensor (1).

    19. Tighten
    Tighten the oxygen sensor to 41 N·m (30 lb ft).


    Object Number: 234135 Size: SH

    Important: The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  19. Install the NEW EGR valve inlet pipe (1).
  20. Loosely install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.
  21. Install the EGR valve inlet pipe bolt (2) to the water crossover pipe.

    22. Tighten
    Tighten the EGR valve inlet pipe bolt to 28 N·m (21 lb ft).

  22. Install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.

    23. Tighten
    Tighten the EGR valve inlet pipe nut to 60 N·m (44 lb ft).

Exhaust Manifold Installation - Right Side with RPO NC1 or NF7 - Aurora


    Object Number: 281914 Size: SH

    Important: Align the threaded hole in the engine block with the hole labeled R (1) on the right coolant heater.

  1. Install the right engine coolant heater.

    2. Object Number: 281918 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.

  2. Install the right engine coolant heater bolt.

    3. Tighten
    Tighten the right coolant heater bolt to 9 N·m (80 lb in).


    Object Number: 483079 Size: SH
  3. Install the knock sensor.

    4. Tighten
    Tighten the knock sensor to 15 N·m (11 lb ft).


    Object Number: 483083 Size: SH
  4. Install the wiring harness bracket.
  5. Install the wiring harness bracket bolt.

    6. Tighten
    Tighten the wiring harness bracket bolt to 25 N·m (18 lb ft).


    Object Number: 483127 Size: SH
  6. Install the oil pressure switch.

    7. Tighten
    Tighten the oil pressure switch to 10 N·m (89 lb in).


    Object Number: 235257 Size: SH
  7. Install the ECT sensor.

    8. Tighten
    Tighten the ECT sensor to 20 N·m (15 lb ft).


    Object Number: 483099 Size: SH
  8. Install the engine wiring harness.
  9. Connect the engine wiring harness to the ECT sensor.

    10. Object Number: 483108 Size: SH
  10. Install the engine wiring harness to the lower crankcase.

    11. Object Number: 483110 Size: SH
  11. Connect the engine wiring harness to the knock sensor.
  12. Install the engine wiring harness to the wiring harness bracket (1).

    13. Object Number: 234122 Size: SH

    Important: Installing the exhaust manifold/crossover pipe assembly with the engine on an engine stand is difficult. Remove the engine from the engine stand and install the exhaust manifold with the engine properly supported on the floor or on a bench.

    Important: You MUST use a new exhaust manifold gasket when installing the exhaust manifold.

  13. Position a new exhaust manifold gasket onto the right exhaust manifold.
  14. Install the exhaust manifold bolts.
  15. Place the right exhaust manifold, exhaust manifold gasket and bolts as an assembly in position on the right cylinder head.
  16. Install the exhaust manifold bolts into the right cylinder head.

    17. Tighten
    Tighten the right exhaust manifold bolts to 25 N·m (18 lb ft).


    Object Number: 235262 Size: SH
  17. Coat the oxygen sensor threads with anti-seize such as GM P/N 12377953 or equivalent.
  18. Install the oxygen sensor (1).

    19. Tighten
    Tighten the oxygen sensor to 41 N·m (30 lb ft).


    Object Number: 234135 Size: SH

    Important: The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  19. Install the NEW EGR valve inlet pipe (1).
  20. Loosely install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.
  21. Install the EGR valve inlet pipe bolt (2) to the water crossover.

    22. Tighten
    Tighten the EGR valve inlet pipe bolt to 28 N·m (21 lb ft).

  22. Install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.

    23. Tighten
    Tighten the EGR valve inlet pipe nut to 60 N·m (44 lb ft).


    Object Number: 520844 Size: SH
  23. Install a NEW A.I.R. manifold gasket.
  24. Install the right A.I.R. manifold.
  25. Install the right A.I.R. manifold bolts.

    26. Tighten
    Tighten the right A.I.R. manifold bolts to 10 N·m (89 lb in).


    Object Number: 520808 Size: SH
  26. Install the right A.I.R. control valve.
  27. Install the right A.I.R. control valve bolts.

    28. Tighten
    Tighten the right A.I.R. control valve bolts to 25 N·m (18 lb ft).


    Object Number: 520812 Size: SH
  28. Install the right A.I.R. control valve pipe bolt and nut to the right A.I.R. manifold.

    29. Tighten
    Tighten the right A.I.R. control valve pipe bolt and nut to 9 N·m (80 lb in).


    Object Number: 576168 Size: SH
  29. Install the vacuum tube harness.
  30. Connect the vacuum tubes (2) to the vacuum solenoid.
  31. Connect the vacuum tube (1) to the right A.I.R. control valve.

Exhaust Manifold Installation - Right Side with RPO NC1 or NF7 - Intrigue


    Object Number: 281914 Size: SH

    Important: Align the threaded hole in the engine block with the hole labeled R (1) on the right coolant heater.

  1. Install the right engine coolant heater.

    2. Object Number: 281918 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.

  2. Install the right engine coolant heater bolt.

    3. Tighten
    Tighten the right coolant heater bolt to 9 N·m (80 lb in).


    Object Number: 483079 Size: SH
  3. Install the knock sensor.

    4. Tighten
    Tighten the knock sensor to 15 N·m (11 lb ft).


    Object Number: 483083 Size: SH
  4. Install the wiring harness bracket.
  5. Install the wiring harness bracket bolt.

    6. Tighten
    Tighten the wiring harness bracket bolt to 25 N·m (18 lb ft).


    Object Number: 483127 Size: SH
  6. Install the oil pressure switch.

    7. Tighten
    Tighten the oil pressure switch to 10 N·m (89 lb in).


    Object Number: 235257 Size: SH
  7. Install the ECT sensor.

    8. Tighten
    Tighten the ECT sensor to 20 N·m (15 lb ft).


    Object Number: 483099 Size: SH
  8. Install the engine wiring harness.
  9. Connect the engine wiring harness to the ECT sensor.

    10. Object Number: 483108 Size: SH
  10. Install the engine wiring harness to the lower crankcase.

    11. Object Number: 483110 Size: SH
  11. Connect the engine wiring harness to the knock sensor.
  12. Install the engine wiring harness to the wiring harness bracket (1).

    13. Object Number: 234122 Size: SH

    Important: Installing the exhaust manifold/crossover pipe assembly with the engine on an engine stand is difficult. Remove the engine from the engine stand and install the exhaust manifold with the engine properly supported on the floor or on a bench.

    Important: You MUST use a new exhaust manifold gasket when installing the exhaust manifold.

  13. Position a new exhaust manifold gasket onto the right exhaust manifold.
  14. Install the exhaust manifold bolts.
  15. Place the right exhaust manifold, exhaust manifold gasket and bolts as an assembly in position on the right cylinder head.
  16. Install the exhaust manifold bolts into the right cylinder head.

    17. Tighten
    Tighten the right exhaust manifold bolts to 25 N·m (18 lb ft).


    Object Number: 235262 Size: SH
  17. Coat the oxygen sensor threads with anti-seize such as GM P/N 12377953 or equivalent.
  18. Install the oxygen sensor (1).

    19. Tighten
    Tighten the oxygen sensor to 41 N·m (30 lb ft).


    Object Number: 234135 Size: SH

    Important: The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  19. Install the NEW EGR valve inlet pipe (1).
  20. Loosely install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.
  21. Install the EGR valve inlet pipe bolt (2) to the water crossover.

    22. Tighten
    Tighten the EGR valve inlet pipe bolt to 28 N·m (21 lb ft).

  22. Install the EGR valve inlet pipe nut (3) to the exhaust crossover pipe.

    23. Tighten
    Tighten the EGR valve inlet pipe nut to 60 N·m (44 lb ft).


    Object Number: 520844 Size: SH
  23. Install a NEW A.I.R. manifold gasket.
  24. Install the right A.I.R. manifold.
  25. Install the right A.I.R. manifold bolts.

    26. Tighten
    Tighten the right A.I.R. manifold bolts to 10 N·m (89 lb in).


    Object Number: 520828 Size: SH
  26. Install the right A.I.R. control valve.
  27. Install the right A.I.R. control valve bolts.

    28. Tighten
    Tighten the right A.I.R. control valve bolts to 25 N·m (18 lb ft).


    Object Number: 520833 Size: SH
  28. Install the right A.I.R. control valve pipe bolt and nut to the right A.I.R. manifold.

    29. Tighten
    Tighten the right A.I.R. control valve pipe bolt and nut to 9 N·m (80 lb in).


    Object Number: 576168 Size: SH
  29. Install the vacuum tube harness.
  30. Connect the vacuum tubes (2) to the vacuum solenoid.
  31. Connect the vacuum tube (1) to the right A.I.R. control valve.