Exhaust Intermediate Pipe Replacement

Intermediate Pipe Replacement

Removal Procedure





Notice: Do not over-flex or damage the flex decoupler joint when moving the flex decoupler joint from the normal mounting position. The flex decoupler joint will flex a maximum of six degrees which is equivalent to the pipes connected at the joint which move 1 inch for each foot length of pipe. A three foot pipe would move a maximum of three inches.

Important: A service intermediate pipe will be needed when replacing the intermediate pipe on an originally equipped, welded system.

1. Raise the vehicle. Refer to Vehicle Lifting.
2. Cut the intermediate pipe forward of the muffler using the service part as a template for making the cut (1).





3. Remove the intermediate pipe bolts at catalytic converter downpipe.





4. Remove the intermediate pipe from the hangers.
5. Remove the intermediate pipe.





6. Remove catalytic converter downpipe gasket.
7. Clean the flange surface.

Installation Procedure





1. Install catalytic converter downpipe gasket.





2. Install the intermediate pipe to the hangers.
Lubricate the exhaust system hangers with Dielectric Silicone Grease GM P/N 12345579 (Canadian P/N 1974984) to ease installation.





Notice: Refer to Fastener Notice in Service Precautions.

3. Install the intermediate pipe bolts to catalytic converter.
^ Tighten the intermediate pipe bolts to 30 Nm (22 ft. lbs.).





4. Clamp the muffler (2) to the intermediate pipe (1).
5. Align the two halves of the exhaust system to prevent contact with underbody components and torque the exhaust system clamp.
^ Tighten the exhaust clamp nuts to 50 Nm (37 ft. lbs.).
6. Lower the vehicle.