Warning: Refer to Hot Exhaust System Warning in the Preface section.

DEFINITION: An audible or physical noise due to a faulty component or damaged components causing a loose or misaligned exhaust system resulting in a rattle or vibration noise, i.e. buzz, groan, hum.

Refer to Symptoms - Engine Exhaust prior to beginning this table.

Popping or hissing noise

Exhaust leak -- Refer to Exhaust Leakage.

Loud exhaust

1. Compare to a known good vehicle.
2. Inspect for a damaged or failed muffler.
3. Replace the faulty muffler. Refer to Exhaust Muffler Replacement.

External rattle or vibration noise

1. Inspect for a bent or loose hanger, or loose heat shield.
2. Inspect for a exhaust pipe causing interference.
3. Repair or replace the faulty hanger, or heat shield. Refer to the following:

•	Exhaust System Insulator, Hanger, Bracket Replacement

•	Exhaust Manifold Heat Shield Replacement

•	Catalytic Converter Heat Shield Replacement

•	Exhaust Pipe Heat Shield Replacement

•	Exhaust Muffler Heat Shield Replacement

Internal rattle

1. Test the components by tapping with a rubber mallet to confirm a rattle.
2. Replace the faulty catalytic converter, or muffler. Refer to Catalytic Converter Replacement or Exhaust Muffler Replacement.