Exhaust System: Description and Operation
DESCRIPTION
WARNING: 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.
CAUTION: 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 3.6L converters are mounted to an integrated exhaust manifold Description and Operation
The 3.6L exhaust system uses two catalytic converters (1) located in the front exhaust pipe and a single muffler (2), with a single resonator/tailpipe assembly.
The exhaust system consists of two front close coupled catalytic converters, a RH rear muffler and resonator assembly, and on vehicles equipped with dual exhaust, LH resonator and tailpipe assembly.
For the single exhaust systems, the RH muffler, resonator and tailpipe (4) are one single unit.
Figure 3 - EXHAUST SYSTEM - V8 DUAL SYSTEM
On a 5.7L/6.4L, both catalytic converters attach directly to the exhaust manifold using studs and nuts.
The exhaust down pipes exit the converters and connect into the rear muffler and resonator (s).
Performance exhaust systems use two catalytic converters (7) located in the front exhaust pipe, and dual mufflers (3), a dual resonator/tailpipe assembly (1), and an active exhaust valve (4) located at the exhaust pipes (5).
The front exhaust pipe/catalytic converter assembly is a hydra-form thin wall air gap design. This design is used to reduce heat, noise and improve emissions. When replacement is required, use original equipment parts (or their equivalent).
The exhaust manifolds are equipped with ball flange outlets to assure a tight seal and strain free connections.
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.
The exhaust system consists of exhaust manifold(s), exhaust pipe with active exhaust valves, differential pressure sensor, catalytic converter(s) with oxygen sensors, muffler and tailpipe.