DIAGNOSIS AND TESTING
EXHAUST SYSTEM - GAS ENGINE
| CONDITION |
POSSIBLE CAUSE |
CORRECTION |
| EXCESSIVE EXHAUST NOISE |
1. Leaks at pipe joints. |
1. Tighten flanges to specified torque at leaking joints
(Refer to 11 - EXHAUST SYSTEM
- SPECIFICATIONS). |
| 2. Burned or blown out muffler. |
2. 3.7L/4.7L Replace muffler/tailpipe
assembly
(Refer to 11 - EXHAUST SYSTEM/MUFFLER - REMOVAL). 5.7L Replace muffler. Check exhaust system. |
|
| 3. Burned or rusted-out exhaust pipe. |
3. 3.7L/4.7L Replace muffler/tailpipe assembly
(Refer
to 11 - EXHAUST SYSTEM/MUFFLER - REMOVAL) . 5.7L Replace tailpipe resonator assembly
(Refer to 11 - EXHAUST SYSTEM/TAILPIPE - REMOVAL). |
|
| 4. Exhaust pipe leaking at manifold flange. |
4. Tighten connection attaching nuts
(Refer to 11 - EXHAUST SYSTEM - SPECIFICATIONS). |
|
| 5. Exhaust manifold cracked or broken. |
5. Replace exhaust manifold
(Refer to 9 - ENGINE/MANIFOLDS/EXHAUST MANIFOLD - REMOVAL). |
|
| 6. Leak between exhaust manifold and cylinder head. |
6. Tighten exhaust manifold to cylinder head stud nuts
or bolts
(Refer to 9 - ENGINE - SPECIFICATIONS). |
|
| 7. Restriction in muffler or
tailpipe. |
7. Remove restriction, if possible. Replace muffler or tailpipe, as necessary. |
|
| 8. Exhaust system contacting body or chassis. |
8. Re-align exhaust system to clear surrounding components. |
|
| LEAKING EXHAUST GASES |
1. Leaks at pipe joints. |
1. Tighten flanges
(Refer to 11 - EXHAUST SYSTEM - SPECIFICATIONS). |