For 1990-2009 cars

Problem | Action
--- | ---
Caution: Refer to Hot Exhaust System Caution in the Preface section. 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.

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

Misaligned or incorrectly installed exhaust system components |

• | Align and tighten the exhaust system components to the required specifications. Refer to Fastener Tightening Specifications.

• | Make sure the exhaust hangers are in the proper locations and not loose. Refer to Exhaust System Insulator, Hanger, Bracket Replacement or Exhaust Hanger Mounting Bracket Replacement.

Exhaust leaks at the following connections:

• | Exhaust manifold to pipe

• | Flanges

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

Seals or gaskets leaking

• | Exhaust manifold to cylinder head

• | Exhaust pipes to exhaust manifold

• | Catalytic converter connection

Replace the leaking seal or gasket. Refer to the affected components repair 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 repair procedure for service.
Exhaust manifold cracked or broken | Replace the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side, Exhaust Manifold Replacement - Right Side, 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 resonator, if equipped, damaged or leaking at the seams | Replace the affected muffler. Refer to Exhaust Muffler Replacement - Left Side or Exhaust Muffler Replacement - Right Side.