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For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Intrigue 🢒 Engine 🢒 Engine Mechanical - 3.5L 🢒 Exhaust Manifold Installation

Exhaust Manifold Installation Right


    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 5613695 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 24 N·m (18 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 Left


    Object Number: 281914 Size: SH

    Important: Align the threaded hole in the engine block with the hole labeled L (2) on the left coolant heater.

  1. Install the left engine coolant heater.

    2. Object Number: 281929 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 left engine coolant heater bolt.

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


    Object Number: 234125 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 install a NEW crossover flange gasket.

  3. Install a NEW manifold to crossover flange gasket onto the left exhaust manifold flange.
  4. Position a NEW exhaust manifold gasket onto the left exhaust manifold.
  5. Install the exhaust manifold bolts into the left exhaust manifold.
  6. Install the left exhaust manifold to the crossover pipe from the right exhaust manifold and up to the left cylinder head.

    7. 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 exhaust manifold bolts into the left cylinder head.

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

  8. Install the left exhaust manifold to crossover pipe flange bolts.

    9. Tighten
    Tighten the left exhaust manifold to crossover flange bolts to 25 N·m (18 lb ft).


    Object Number: 277022 Size: SH
  9. Place the exhaust manifold heat shield in position.
  10. Install the exhaust manifold heat shield bolts.

    11. Tighten
    Tighten the exhaust manifold heat shield bolts to 9 N·m (80 lb in).


    Object Number: 233866 Size: SH
  11. Install a NEW O-ring on the oil level indicator tube.
  12. Install the oil level indicator and tube by sliding the tube down through the exhaust manifold and fitting the end into lower crankcase hole.
  13. Install the oil level indicator tube bolt.

    14. Tighten
    Tighten the oil level indicator tube bolt to 9 N·m (80 lb in).

Exhaust Manifold Installation Left with RPO NB7


    Object Number: 281914 Size: SH

    Important: Align the threaded hole in the engine block with the hole labeled L (2) on the left coolant heater.

  1. Install the left engine coolant heater.

    2. Object Number: 281929 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 left engine coolant heater retainer bolt.

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


    Object Number: 234125 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 install a NEW crossover flange gasket.

  3. Install a NEW manifold to crossover flange gasket onto the left exhaust manifold flange.
  4. Position a NEW exhaust manifold gasket onto the left exhaust manifold.
  5. Install the exhaust manifold bolts into the left exhaust manifold.
  6. Install the left exhaust manifold to the crossover pipe from the right exhaust manifold and up to the left cylinder head.

    7. 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 exhaust manifold retaining bolts into the left cylinder head.

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

  8. Install the left exhaust manifold to crossover pipe flange retaining bolts.

    9. Tighten
    Tighten the left exhaust manifold to crossover flange bolts to 25 N·m (18 lb ft).


    Object Number: 277022 Size: SH
  9. Place the exhaust manifold heat shield in position.
  10. Install the exhaust manifold heat shield retaining bolts.

    11. Tighten
    Tighten the exhaust manifold heat shield retaining bolts to 9 N·m (80 lb in).


    Object Number: 234326 Size: SH
  11. Connect the A.I.R. feed pipe nut (3) to the exhaust manifold.
  12. Install the A.I.R. control valve retaining bolts to the torque strut bracket.

    13. Tighten
    Tighten the control valve retaining bolts to 9 N·m (80 lb in).

  13. Install the feed pipe nut (3).

    14. Tighten
    Tighten the feed pipe nut to 60 N·m (44 lb ft).

  14. Connect the vacuum tube (1) to the A.I.R. control valve.

    15. Object Number: 483143 Size: SH
  15. Connect the A.I.R. vacuum hose to the throttle body.

    16. Object Number: 483149 Size: SH
  16. Install the A.I.R. vacuum hose to the retaining clip on the engine lift bracket.

    17. Object Number: 233866 Size: SH
  17. Install a NEW O-ring on the oil level indicator tube.
  18. Install the oil level indicator and tube by sliding the tube down through the exhaust manifold and fitting the end into lower crankcase hole.
  19. Install the oil level indicator tube retaining bolt.

    20. Tighten
    Tighten the oil level indicator retaining bolt to 9 N·m (80 lb in).