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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Mechanical - 4.6L (5 Of 5)) >> Off-Vehicle Repair Instructions (3 Of 3) >> Exhaust Manifold Installation - Right Side (With RPO NC1 or NF7)

Exhaust Manifold Installation - Right Side (With RPO NC1 or NF7)

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Right Coolant Heater
    GM350278Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  1. If the engine is equipped with coolant heaters, install the right side (1) heater as follows:
    1. Place the coolant heater (1) in position on the cylinder block.
    2. Install the coolant heater bolt.

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

    2. Fig 2: Identifying Right Exhaust Manifold Retaining Nuts
    GM871672Courtesy of GENERAL MOTORS CORP.
  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:  Tighten the exhaust manifold nuts (3) to 25 N.m (18 lb ft).

    6. Fig 3: View of Oxygen Sensor
    GM331281Courtesy of GENERAL MOTORS CORP.
  6. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
  7. Install the oxygen sensor (1).

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

    8. Fig 4: Identifying Secondary Air Injection Valve Pipe Nuts
    GM1207117Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: 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.

    Tighten:  Tighten the AIR valve bolts to 9 N.m (80 lb in).

  11. Install the AIR valve pipe nuts to the exhaust manifold.

    Tighten:  Tighten the AIR valve pipe nuts to 9 N.m (80 lb in).

    12. Fig 5: Identifying Exhaust Intermediate Pipe
    GM1564095Courtesy of GENERAL MOTORS CORP.
  12. Install the exhaust intermediate pipe.
    13. Fig 6: View Of Exhaust Intermediate Pipe Bolts
    GM1564094Courtesy of GENERAL MOTORS CORP.
  13. Install the exhaust intermediate pipe bolts.

    Tighten:  Tighten the exhaust intermediate pipe bolts to 30 N.m (22 lb ft).

    14. Fig 7: Identifying Engine Rear Lift Bracket
    GM1564093Courtesy of GENERAL MOTORS CORP.
  14. Install the engine rear lift bracket.
  15. Install the engine rear lift bracket bolts.

    Tighten:  Tighten the engine rear lift bracket bolts to 30 N.m (22 lb ft).

    16. Fig 8: Identifying EGR Valve Inlet Pipe
    GM1564091Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: 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. Fig 9: Identifying EGR Valve Inlet Pipe Nut
    GM1564088Courtesy of GENERAL MOTORS CORP.
  17. Loosely thread the EGR valve inlet pipe nut (1) onto the fitting on the exhaust intermediate pipe.
    18. Fig 10: Identifying EGR Valve Inlet Pipe
    GM1564244Courtesy of GENERAL MOTORS CORP.
  18. Loosely thread the EGR valve inlet pipe bolt into the water crossover.
  19. Tighten the EGR valve inlet pipe nut.

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

  20. Tighten the EGR valve inlet pipe bolt.

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

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