Intermittent Conditions
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating as designed.
Exhaust Leakage
| Condition | Action |
|---|---|
| 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. Make sure the exhaust hangers are in the proper locations and not loose. |
| Exhaust leaks at the following connections: Exhaust manifold to pipe Flange | Tighten the affected components to the required specifications. |
| Seals or gaskets leaking Exhaust manifold to cylinder head Exhaust pipes to exhaust manifold Catalytic converter connection | Replace the leaking seal or gasket. |
| Irregularities at the mating surfaces on the flange connections | Repair as required or replace the affected component. |
| Exhaust manifold cracked or broken | Replace the exhaust manifold. Refer to Exhaust Manifold Replacement . |
| Exhaust system component connection welds leaking | Replace the leaking component. |
| Muffler or resonator, if equipped, damaged or leaking at the seams | Replace the affected muffler. Refer to Exhaust Muffler Replacement . |
Exhaust Leakage