| 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. |
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
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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
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Replace the leaking seal or gasket. Refer to the affected component's procedure for service. |
| Exhaust manifold cracked or broken. |
Replace the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (LNJ) or Exhaust Manifold Replacement - Left Side (LY7) or Exhaust Manifold Replacement - Right Side (LNJ) or Exhaust Manifold Replacement - Right Side (LY7) . |
| Exhaust system component connection welds leaking. |
Replace the leaking component. Refer to the affected component's procedure for service. |
| Catalytic converter, muffler, or resonator, if equipped, damaged or leaking at the seams. |
Replace the affected catalytic converter, muffler, or resonator. Refer to one of the following:
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