Exhaust Manifold Replacement - Right Side 6.0L

1. Remove the engine sight cover Refer to Upper Intake Manifold Sight Shield Replacement .
2. Remove the spark plugs. Refer to Spark Plug Replacement .
3. Remove the bank 2, sensor 1 oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Remove the catalytic convertor. Refer to Catalytic Converter Replacement - Right Side .
6. Remove the mounting nuts for the exhaust manifold.




Important: In the following service procedure, it may be necessary to remove the heat shield from the exhaust manifold.

7. Remove the exhaust manifold and gasket.

Important: Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.

Notice: Refer to Fastener Notice in the Preface section.

1. If necessary, install the exhaust manifold heat shield and bolts.

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

Important: In the following service procedure, DO NOT tighten the exhaust clamp. Leave it loosened so that the exhaust manifold and gasket can be aligned on the cylinder head.

2. Install the catalytic convertor on the intermediate pipe.




Important: Use one or two bolts to hold the manifold and gasket in place.

3. Install the exhaust manifold and gasket.
4. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts.
5. Install the exhaust manifold bolts.

Tighten

1. Tighten the exhaust manifold bolts at first pass to 15 N·m (11 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side to side, working toward the outside bolts.
2. Tighten the exhaust manifold bolts a final pass to 25 N·m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side to side, working toward the outside bolts.
6. Install the spark plugs. Refer to Spark Plug Replacement .
7. Install the engine sight cover Refer to Upper Intake Manifold Sight Shield Replacement .
8. Install the bank 2, sensor 1 oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .
9. Install the catalytic convertor to the exhaust manifold nuts. Refer to Catalytic Converter Replacement - Right Side .

Exhaust Manifold Replacement - Right Side 7.0L