Exhaust System: Description and Operation

Exhaust System

WARNING: The normal operating temperature of the exhaust system is very high. Never attempt to repair any part of the system until it has cooled. Be especially careful when working around the three way catalytic converter. The temperature of the catalytic converter rises to a high level after only a few minutes of engine operation.

CAUTION: When repairing exhaust system or removing exhaust components, disconnect all heated oxygen sensors (HO2S) at the wiring connectors to prevent damage to the heated oxygen sensors and wiring harness.

The exhaust system:
^ contains a one-piece catalytic converter assembly.
^ has one muffler assembly with integral heat shields (3.8L).
^ has a LH muffler assembly and a RH muffler assembly with integral heat shields (4.6L).
^ has muffler brackets with isolators at the rear of the muffler, bolted to the body.
^ has brackets with isolators at the tailpipe bolted to the frame.
^ has two upstream heated oxygen sensors (HO2S).
^ production muffler and tailpipe assembly is a one-piece design exhaust system.

Exhaust System:

Exhaust System - 3.8L.

Exhaust System:

Exhaust System - 4.6L

CAUTION: Do not use oil or grease-based lubricants on the isolators. They may case deterioration of the rubber.

CAUTION: Oil or grease-based lubricants on the isolators may cause the exhaust hanger isolator to separate from the exhaust hanger bracket during vehicle operation.

Exhaust fasteners are of a torque prevailing design. Use only new fasteners with the same part number as the original. Torque values must be used as specified during reassembly to make sure of correct retention of exhaust components.