Symptom Tree t052
| Cause | Correction |
|---|
Refer to Engine Noise Diagnostic Procedures – General Information at the end of Section TS before using this symptom tree.
|
Turbocharger is not correct |
Check the turbocharger part number and compare it to the Control Parts List (CPL), Bulletin 3379133 or 4021327. Replace the turbocharger if necessary. Refer to Procedure 010-033. |
 |
|
Air intake system restriction is above specification |
Check the air intake system for restriction. Clean or replace the air filter and inlet piping as necessary. Refer to Procedure 010-031. |
|
|
Air intake or exhaust leaks |
Inspect the air intake and exhaust systems for air leaks. Refer to Procedure 010-024. |
|
|
Air intake or exhaust piping is contacting the chassis or cab |
Inspect the air piping, chassis, and cab for contact points. Refer to the OEM service manual. |
|
|
Exhaust system restriction is not within specification |
Check the exhaust system for restrictions. Refer to Procedure 011-009. |
|
|
Turbocharger is worn or damaged |
Check the turbocharger for damage. Measure the turbine and compressor wheel clearances. Refer to Procedure 010-033. |
