Exhaust Manifold Replacement - Right Side 4.3L

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the right front tire. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
3. Remove the right fender wheelhouse extension (1).



4. Disconnect the spark plug wires from the spark plugs.
5. Remove the bolts and the spark plug wire support.
6. Remove the spark plugs.
7. Remove the starter.
8. Remove the catalytic converter assembly.
9. Remove the AIR pipe from the exhaust manifold, if equipped.



10. Remove the exhaust manifold bolts through the wheelhouse.
11. Remove the exhaust manifold with the exhaust manifold gaskets and the spark plug wire shields from the engine.
12. Clean all gasket surfaces.

Important: To assist in installing the exhaust manifold to the engine, the tabs on a NEW exhaust manifold gasket will hold the gasket and the bolts in place.

1. Sub-assemble the NEW gaskets, the spark plug wire shields, and the bolts to the exhaust manifold.
2. Ensure that the exhaust manifold bolts are held in place by the tabs on the exhaust manifold gaskets.
3. Install the exhaust manifold. Refer to Exhaust Manifold Installation - Right Side .
4. Install the AIR pipe to the exhaust manifold, if equipped. Refer to Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 1 in Engine Controls.
5. Install the catalytic converter assembly. Refer to Catalytic Converter Replacement .
6. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.



7. Install the spark plugs.

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.

8. Install the spark plug wire support and bolts.

Tighten
Tighten the spark plug wire support bolts to 12 N·m (106 lb in).

9. Install the spark plug wires. Refer to Spark Plug Replacement in Engine Controls -- 4.3L.



10. Install the fender wheelhouse extension (1).
11. Install the front tire. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
12. Lower the vehicle.

Exhaust Manifold Replacement - Right Side 5.7L

1. Remove the exhaust pipe from the exhaust manifold.
2. Remove the engine cover.
3. Remove the air cleaner assembly.
4. Remove the oil level indicator tube.
5. Remove the exhaust manifold.
6. Clean all sealing surfaces.

1. Install the exhaust manifold.
2. Install the oil level indicator tube.



3. Install the exhaust pipe to the exhaust manifold.
4. Install the air cleaner assembly.
5. Install the engine cover.