Exhaust Leakage

Problem	Action
WARNING: Refer to Hot Exhaust System Warning . NOTE: 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 improperly installed exhaust system components	CAUTION: Refer to Fastener Caution . Align and tighten the components to the specifications. Refer to Fastener Tightening Specifications .
Exhaust leaks at the following connections: Exhaust manifold to pipe Flanges Pipe clamps	Tighten the components to the specifications. Refer to Fastener Tightening Specifications .
Seals or gaskets leaking: Exhaust manifold to cylinder head Exhaust pipes to exhaust manifold Catalytic converter connection EGR connections AIR connections to the exhaust manifold or cylinder head	Replace the leaking seal or gasket. Refer to the affected components procedure for service.
Exhaust manifold cracked or broken	Replace the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (L26) or Exhaust Manifold Replacement - Left Side (LS4) or Exhaust Manifold Replacement - Right Side (3.8L) or Exhaust Manifold Replacement - Right Side (LS4) .
Exhaust system component connection welds leaking	Replace the leaking component. Refer to the affected component's procedure for service.
Muffler is damaged or leaking at the seams	Replace the affected muffler. Refer to Exhaust Muffler Replacement (3.8L L26) or Exhaust Muffler Replacement (5.3L LS4) .