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For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2003 🢒 Aurora 🢒 Engine 🢒 Engine Mechanical - 4.0L 🢒 Exhaust Manifold Installation - Left Side

Exhaust Manifold Installation - Left Side W/O RPO NC1 or NF7


    Object Number: 350279 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.

  1. If the engine is equipped with coolant heaters, install the left side (1) heater as follows:
    2. 1.1. Place the coolant heater (1) in position on the cylinder block.
    1.2. Install the coolant heater bolt.

    Tighten
    Tighten the coolant heater bolt to 10 N·m (89 lb in).


    Object Number: 315063 Size: SH
  2. With the manifold still on the bench, position a new manifold gasket (1) in place on the manifold sealing surface.
  3. Install 2 outer manifold bolts (6) in the manifold to retain the gasket.
  4. Install a new manifold to intermediate pipe flange gasket (5).
  5. Using 2 hands, place the manifold (2) in the intermediate pipe and onto the cylinder head.
  6. Install new manifold flange bolts (3) for maximum joint integrity. Hand tighten. Do not torque the flange bolts to specification until the engine is mounted in the vehicle.
  7. Hand tighten the 2 outer manifold bolts.
  8. Install the remaining manifold bolts.

    9. Tighten
    Tighten the exhaust manifold bolts (6) to 25 N·m (18 lb ft).


    Object Number: 331274 Size: SH
  9. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
  10. Install the oxygen sensor (1).

    11. Tighten
    Tighten the oxygen sensor to 40 N·m (30 lb ft).

Exhaust Manifold Installation - Left Side W/RPO NC1 or NF7


    Object Number: 350279 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.

  1. If the engine is equipped with coolant heaters, install the left side (1) heater as follows:
    2. 1.1. Place the coolant heater (1) in position on the cylinder block.
    1.2. Install the coolant heater bolt.

    Tighten
    Tighten the coolant heater bolt to 10 N·m (89 lb in).


    Object Number: 871664 Size: SH

    Important: DO NOT reuse the exhaust manifold gasket.

  2. With the manifold still on the bench, position a new manifold gasket (1) in place on the manifold sealing surface.
  3. Install 2 outer manifold bolts (6) in the manifold to retain the gasket.
  4. Install a new manifold to intermediate pipe flange gasket (5).
  5. Using 2 hands, place the manifold (2) in the intermediate pipe and onto the cylinder head.
  6. Install new manifold flange bolts (3) for maximum joint integrity. Hand tighten. Do not torque the flange bolts to specification until the engine is mounted in the vehicle.
  7. Hand tighten the 2 outer manifold bolts.
  8. Install the remaining manifold bolts.

    9. Tighten
    Tighten the exhaust manifold bolts  (6) to 25 N·m (18 lb ft).


    Object Number: 331274 Size: SH
  9. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
  10. Install the oxygen sensor (1).

    11. Tighten
    Tighten the oxygen sensor to 40 N·m (30 lb ft).


    Object Number: 522465 Size: SH

    Important: DO NOT reuse the old A.I.R. valve pipe gasket.

  11. Install the NEW A.I.R. valve pipe gasket.
  12. Install the A.I.R. valve.
  13. Install the A.I.R. valve nuts to the mounting bracket.

    14. Tighten
    Tighten the A.I.R. valve nuts to 9 N·m (80 lb in).

  14. Install the A.I.R. valve bolt through the mounting bracket.

    15. Tighten
    Tighten the A.I.R. valve bolt to 9 N·m (80 lb in).

  15. Install the A.I.R. valve pipe nuts to the exhaust manifold.

    16. Tighten
    Tighten the A.I.R. valve pipe nuts to 9 N·m (80 lb in).

  16. Install the A.I.R. vacuum harness.

    17. Object Number: 522436 Size: SH
  17. Connect the vacuum harness to the water crossover vacuum port.

    18. Object Number: 522447 Size: SH
  18. Connect the vacuum harness to the A.I.R. valve.