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Exhaust Noise

Exhaust Noise


Condition Action
Warning

While engine is operating, the exhaust system will become extremely hot. To prevent burns avoid contacting a hot exhaust system.


EXPLANATION: buzzing, groaning or humming noise. 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.

Refer to Symptoms - Engine Exhaust .

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 muffle

3. Replace the affected muffler. Refer to Exhaust Muffler Replacement (LAU/A28NER) Exhaust Muffler Replacement (Spare part) Exhaust Muffler Replacement (LBY/A20DTR) Exhaust Muffler Replacement (LBS/A20DTH) Exhaust Muffler Replacement (LHU/A20NFT, LLU/A16LET)


External rattle or vibration noise


1. Inspect for a bent or loose hanger, loose heat shield, or loose clamp.

2. Inspect for a exhaust pipe causing interference.

3. Repair or replace the affected component. Refer to the affected component's service procedure.


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 one of the following procedures:

• Refer to Exhaust Manifold Replacement (Diesel) Exhaust Manifold Replacement (LHU/A20NFT) or Exhaust Manifold Replacement - Left Side (LAU/A28NER) or Exhaust Manifold Replacement - Right Side (LAU/A28NER) .

• Refer to Catalytic Converter Replacement (LAU/A28NER) Catalytic Converter Replacement (LBY/A20DTR) Catalytic Converter Replacement (LLU/A16LET) Catalytic Converter Replacement (LBS/A20DTH) Catalytic Converter Replacement (LHU/A20NFT) Catalytic Converter Replacement (LHU/A20NFT - AWD) .

• Refer to Exhaust System Replacement (LAU/A28NER) Exhaust System Replacement (LLU/A16LET) Exhaust System Replacement (LHU/A20NFT) Exhaust System Replacement (LHU/A20NFT - AWD, LAU/A28NER - AWD) .