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

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

DEFINITION: An exhaust leak may show stains at the area of the leak. The leak may be felt by holding a hand close to the suspected areas or using a smoke pencil. The leak may make a popping or hissing noise.

Misaligned or incorrectly installed exhaust system components

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Align and tighten the components to the specifications. Refer to Fastener Tightening Specifications .

Exhaust leaks at the following connections:

Tighten the components to the specifications. Refer to Fastener Tightening Specifications .

Seals or gaskets leaking:

Replace the leaking seal or gasket. Refer to the affected components procedure for service.

Irregularities at the mating surfaces on the flange connections

Repair as required or replace the affected component. Refer to the affected components procedure for service.

Exhaust manifold cracked or broken

Replace the exhaust manifold. Refer to, Exhaust Manifold Replacement - Left Side , or Exhaust Manifold Replacement - Right Side .

Exhaust system component connection welds leaking

Replace the leaking component. Refer to the affected component's procedure for service.

Muffler or resonatoor, if equipped, damaged or leaking at the seams

Replace the affected muffler or resonator. Refer to Muffler Replacement .