Exhaust Manifold Replacement - Left

Exhaust Manifold Replacement Left (4.3L)

Removal Procedure
1. Remove the engine cover.





2. Disconnect the engine coolant temperature (ECT) gage sensor electrical connector.
3. Raise the vehicle. Refer to Vehicle Lifting.
4. Remove the left front tire.





5. Remove the left fender wheelhouse extension (1).
6. Remove the catalytic converter assembly.





7. Remove the EGR valve inlet pipe from the exhaust manifold.





8. Remove the spark plug wires from the spark plugs.
9. Remove the spark plug wire support bolts.
10. Remove the spark plug wire support with the spark plug wires.
11. Remove the spark plugs.





12. Remove the exhaust manifold, gaskets and the spark plug wire shields from underneath the vehicle.
13. Clean all gasket surfaces.

Installation Procedure





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.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the exhaust manifold.
3.1. Tighten the exhaust manifold bolts - First Pass to 15 Nm (11 ft. lbs.).
3.2. Tighten the exhaust manifold bolts - Second Pass to 30 Nm (22 ft. lbs.).





4. Install the spark plugs.
5. Install the spark plug wires to the spark plugs.
6. Install the spark plug wire support and bolts.
^ Tighten the spark plug wire support bolts to 12 Nm (106 inch lbs.).





7. Install the EGR valve inlet pipe to the exhaust manifold.
^ Tighten the EGR valve inlet pipe exhaust manifold nut to 30 Nm (22 ft. lbs.).
8. Install the catalytic converter assembly.





9. Install the fender wheelhouse extension (1).
10. Install the left front tire.
11. Lower the vehicle.





12. Connect the ECT gage sensor electrical connector.
13. Install the engine cover.