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Excessive Exhaust System Noise

CONDITION POSSIBLE CAUSES CORRECTION
EXCESSIVE EXHAUST NOISE (UNDER HOOD) 1. Catalytic converter to cylinder head leak. 1. Tighten fasteners and/or replace gasket.
2. Catalytic converter to cross-under pipe leak. 2. Tighten joint fasteners and/or replace gasket.
3. Physical damage to exhaust component. 3. Replace as necessary.
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 resonator/muffler/pipe assembly.
3. Catalytic converter material in muffler. 3. Replace muffler and converter assemblies. Check fuel injection and ignition systems for proper operation.