OEM Chevrolet Avalanche 1500 Exhaust Manifold

Chevrolet Avalanche 1500 Exhaust Manifold Parts Questions & Experts Answers

• Exhaust Manifold, Driver Side
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  Q: How to replace the left exhaust manifold on Chevrolet Avalanche 1500?

  A: The first step to replace the left Exhaust Manifold requires removing Ignition Coils and Spark Plugs before elevating the vehicle with support. Start by removing Exhaust Manifold pipe nuts then lower the automobile. After removing Exhaust Manifold bolts and manifold along with the gasket the old gasket should be discarded. In some cases the Exhaust Manifold heat shield will need to be unbolted along with its shield before removal. An inspection and cleaning process should be performed on the Exhaust Manifold unless the replacement plan includes new manifold installation. When performing an installation the heat shield and bolts need to be attached to the Exhaust Manifold before tightening them to 9 nm (80 inch lbs.). To prepare the bolt holes for installation, inspect and clean the threads on Exhaust Manifold bolt holes before omitting threadlock material from the initial three bolt threads. The thread ends of Exhaust Manifold bolts require a 5 mm (0.2 inch) wide application of threadlock gm p/n 12345493 (Canadian P/N 10953488) or its equivalent product. Start by tightening the center bolts followed by progressive side-to-side movement of bolt tightness toward the outside bolts until reaching 15 nm (11 ft. Lbs.) and complete this process once again with a final tightening to 25 nm (18 ft. Lbs.). Establish a flat surface on the Exhaust Manifold gasket at the left cylinder head rear section by bending it with a flat punch. Position the vehicle for the second time before adding and torquing the Exhaust Manifold pipe nuts to 50 nm (37 ft. Lbs. Torque). You should install spark plugs and ignition coils after lowering the vehicle.