Right
Exhaust Manifold Replacement - RightRemoval Procedure
1. Raise the vehicle. Refer to Vehicle Lifting.
2. Disconnect the exhaust pipe from the exhaust manifold.
3. Lower the vehicle.
4. Remove the bolt for the oil level indicator tube.
Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.
5. Remove the spark plug wires from the spark plugs.
5.1. Rotate the spark plug wire boot 1/2 turn.
5.2. Pull outward on the spark plug wire boot to release from the spark plug.
6. Remove the spark plug wires from the spark plug wire retainers.
7. Remove the exhaust manifold bolts.
8. Remove the spark plug wire shields and the exhaust manifold.
9. Remove and discard the exhaust manifold gaskets.
10. Clean all gasket surfaces.
Installation Procedure
Important: To assist in installing the exhaust manifold to the engine, the tabs at the bolt holes on a NEW exhaust manifold gasket will hold the bolts and the gaskets in place.
1. Sub-assemble the bolts, spark plug wire shields, and NEW gaskets 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.
4. Install the spark plug wire shields.
5. If reusing the fasteners, apply threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts.
Notice: Refer to Fastener Notice in Service Precautions.
6. Install the exhaust manifold bolts.
6.1. Tighten the exhaust manifold bolts on the first pass to 15 Nm (11 ft. lbs.).
6.2. Tighten the exhaust manifold bolts on the final pass to 30 Nm (22 ft. lbs.).
7. Install the spark plug wires to the spark plug wire retainers.
8. Install the spark plug wires onto the spark plugs.
9. Raise the vehicle. Refer to Vehicle Lifting.
10. Connect the exhaust pipe to the exhaust manifold.
11. Lower the vehicle.
12. Install the bolt for the oil level indicator tube.
^ Tighten the oil level indicator tube bolt to 12 Nm (106 inch lbs.).