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Exhaust System

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
CONDITION  POSSIBLE CAUSES  CORRECTION 
EXCESSIVE EXHAUST NOISE (UNDER HOOD) 1. Exhaust manifold cracked or broken. 1. Replace manifold.
2. Manifold to cylinder head leak. 2. Tighten manifold and/or replace gasket.
3. EGR tube to manifold gasket leakage. 3. Tighten fasteners or replace gasket.
4. EGR Valve to EGR tube gasket leakage. 4. Tighten fasteners or replace gasket.
5. Exhaust to manifold leak. 5. Tighten or replace nuts
6. Pipe and shell noise from front exhaust pipe. 6. Characteristic of single wall pipe.
EXCESSIVE EXHAUST NOISE 1. Leak at exhaust pipe joints. 1. Tighten clamps at leaking joints.
2. Burned or rusted out muffler assembly or exhaust pipe. 2. Replace muffler and resonator assembly and/or LH rear resonator and tailpipe assembly as necessary.
3. Burned or rusted out resonator(s). 3. Replace RH muffler and resonator assembly and/or RH resonator and tailpipe as necessary.
4. Restriction in exhaust system. 4. Remove restriction if possible, or replace components as necessary.
5. Converter material in muffler or resonators. 5. Replace RH muffler and resonator assembly and/or RH resonator and tailpipe as necessary. Check fuel injection and ignition systems for proper operation.