Description And Operation
The normal operating temperature of the exhaust system is very high. Therefore, never work around or attempt to service any part of the exhaust system until it is cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a high level after a short period of engine operation time.
Avoid application of rust prevention compounds or undercoating materials to exhaust system floor pan heat shields. Light overspray near the edges is permitted. Application of coating will result in excessive floor pan temperatures and objectionable fumes.
The FWD exhaust system consists of right and left catalytic converters (1), cross-under pipe (2), exhaust pipe (3) and exhaust isolators (4). The system is separated into two sections for service, the exhaust pipe (3) with integrated tuning devices and the cross-under pipe (2). There are upstream and downstream oxygen sensors located in both the front and rear catalytic converters.
The AWD exhaust system consists of right (3) and left (1) catalytic converters, cross-under pipe (4), exhaust pipe assembly (7) and exhaust isolators (5, 8, 9, 10, 11). The system is separated into two sections for service, the exhaust pipe with integrated tuning devices and the cross-under pipe. There are clamps (2, 6) securing the cross-under pipe to the exhaust pipe and right catalytic converter. There are upstream and downstream oxygen sensors located in both the front and rear catalytic converters.
The catalytic converters are bolted to the cylinder heads integrated exhaust manifold. A steel retainer bracket is used to hold the lower section of the flange while two bolts are used to secure the flange to the integrated exhaust manifold. The exhaust manifolds are part of the cylinder head. They are non removable. If any damage is found to the manifolds. The cylinder head must be repaired or replaced.
- The exhaust system must be properly aligned to prevent stress, leakage and body contact. If the system contacts any body panel, it may amplify objectionable noises originating from the engine or body.
- When inspecting an exhaust system, critically inspect for cracked or loose joints, stripped screw or bolt threads, corrosion damage and worn, cracked or broken hangers. Replace all components that are badly corroded or damaged. DO NOT attempt to repair.
- When replacement is required, use original equipment parts (or their equivalent). This will assure proper alignment and provide acceptable exhaust noise levels.