GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Allure 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Exhaust Crossover Pipe Replacement

Exhaust Crossover Pipe Replacement 3.8L

Removal Procedure

    Object Number: 910984 Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.
  2. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement.
  3. Remove the exhaust crossover heat shield nuts (1).
  4. Remove the exhaust crossover heat shield (2).

    5. Object Number: 911162 Size: SH
  5. Remove the exhaust crossover pipe studs (3) and the bolts (2).
  6. Remove the exhaust crossover pipe (1).
  7. Remove the exhaust crossover pipe seal (4).

Installation Procedure

    Object Number: 911162 Size: SH
  1. Install the exhaust crossover pipe seal (4) to the exhaust crossover pipe (1) at the right exhaust manifold connection.
  2. Install the exhaust crossover pipe (1).

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the exhaust crossover pipe studs (3) and the bolts (2).

    4. Tighten
    Tighten the studs and the bolts to 20 N·m (15 lb ft).


    Object Number: 910984 Size: SH
  4. Install the exhaust crossover heat shield (2).
  5. Install the exhaust crossover heat shield nuts (1).

    6. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

  6. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement.
  7. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.

Exhaust Crossover Pipe Replacement LS4

Removal Procedure

    Object Number: 1554543 Size: SH
  1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement.
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement.
  3. Remove the exhaust crossover pipe heat shield.
  4. Remove the exhaust crossover pipe nuts.
  5. Remove the exhaust crossover pipe.
  6. Remove the exhaust crossover pipe seal.

Installation Procedure

    Object Number: 1554543 Size: SH
  1. Install the exhaust crossover pipe seal to the exhaust crossover pipe at the right exhaust manifold connection.
  2. Install the exhaust crossover pipe.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the exhaust crossover pipe nuts.

    4. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

  4. Install the exhaust crossover pipe heat shield.
  5. Install the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement.
  6. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement.