GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Exhaust Manifold Installation - Right Side

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

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 350278 Size: SH
  1. If the engine is equipped with coolant heaters, install the right 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 the coolant heater bolt to 10 N·m (89 lb in).

    Object Number: 315065 Size: SH
  2. Position a new manifold gasket (1) in place on the cylinder head studs.
  3. Using two hands, position the manifold (2) onto the cylinder head.
  4. Install two outer manifold nuts (3) to hold the manifold in place.
  5. Install the remaining manifold nuts. Tighten the exhaust manifold nuts (3) to 25 N·m (18 lb ft).

    6. Object Number: 331281 Size: SH
  6. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
  7. Install the oxygen sensor (1). Tighten the oxygen sensor to 40 N·m (30 lb ft).

    8. Object Number: 1564095 Size: SH
  8. Install the exhaust intermediate pipe.

    9. Object Number: 1564094 Size: SH
  9. Install the exhaust intermediate pipe bolts and tighten to 30 N·m (22 lb ft).

    10. Object Number: 1564093 Size: SH
  10. Install the engine rear lift bracket.
  11. Install the engine rear lift bracket bolts and tighten to 30 N·m (22 lb ft).

    12. Object Number: 1564091 Size: SH

    Note: The exhaust gas recirculation (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.

  12. Install the NEW EGR valve inlet pipe into the water crossover port.

    13. Object Number: 1564088 Size: SH
  13. Loosely thread the EGR valve inlet pipe nut (1) onto the fitting on the exhaust intermediate pipe.

    14. Object Number: 1564244 Size: SH
  14. Loosely thread the EGR valve inlet pipe bolt into the water crossover.
  15. Tighten the EGR valve inlet pipe nut and tighten to 60 N·m (44 lb ft).
  16. Tighten the EGR valve inlet pipe bolt and tighten to 28 N·m (21 lb ft).

Exhaust Manifold Installation - Right Side With RPO NC1 or NF7

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 350278 Size: SH
  1. If the engine is equipped with coolant heaters, install the right 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 and tighten to 10 N·m (89 lb in).

    Object Number: 871672 Size: SH
  2. Position a new manifold gasket (1) in place on the cylinder head studs.
  3. Using two hands, position the manifold (2) onto the cylinder head.
  4. Install two outer manifold nuts (3) to hold the manifold in place.
  5. Install the remaining manifold nuts. Tighten the exhaust manifold nuts (3) to 25 N·m (18 lb ft).

    6. Object Number: 331281 Size: SH
  6. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
  7. Install the oxygen sensor (1) and tighten to 40 N·m (30 lb ft).

    8. Object Number: 1207117 Size: SH

    Note: DO NOT reuse the old secondary air injection (AIR) valve pipe gasket.

  8. Install the NEW AIR valve pipe gasket.
  9. Install the AIR valve.
  10. Install the AIR valve bolts through the mounting bracket and tighten to 9 N·m (80 lb in).
  11. Install the AIR valve pipe nuts to the exhaust manifold. Tighten the AIR valve pipe nuts to 9 N·m (80 lb in).

    12. Object Number: 1564095 Size: SH
  12. Install the exhaust intermediate pipe.

    13. Object Number: 1564094 Size: SH
  13. Install the exhaust intermediate pipe bolts and tighten to 30 N·m (22 lb ft).

    14. Object Number: 1564093 Size: SH
  14. Install the engine rear lift bracket.
  15. Install the engine rear lift bracket bolts and tighten to 30 N·m (22 lb ft).

    16. Object Number: 1564091 Size: SH

    Note: The exhaust gas recirculation (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.

  16. Install the NEW EGR valve inlet pipe into the water crossover port.

    17. Object Number: 1564088 Size: SH
  17. Loosely thread the EGR valve inlet pipe nut (1) onto the fitting on the exhaust intermediate pipe.

    18. Object Number: 1564244 Size: SH
  18. Loosely thread the EGR valve inlet pipe bolt into the water crossover.
  19. Tighten the EGR valve inlet pipe nut and tighten to 60 N·m (44 lb ft).
  20. Tighten the EGR valve inlet pipe bolt and tighten to 28 N·m (21 lb ft).