Cummins N14 STC, Celect, Celect Plus – Service Manual Engine Noise Excessive – Turbocharger

Symptom Tree  t052

This is symptom tree
Cause Correction

Refer to Engine Noise Diagnostic Procedures – General Information within troubleshooting overview procedure 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 4021328. Replace the turbocharger, if necessary. Refer to Procedure 010-033 in Section 10.


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.


Air intake or exhaust leaks

Inspect the air intake and exhaust systems for air leaks. Refer to Procedure 010-024 in Section 10.


Air intake system restriction is above specification

Check the air intake system for restrictions. Clean or replace the air filter and inlet piping as necessary. Refer to Procedure 010-031 in Section 10.


Exhaust system restriction

Check the exhaust system for restrictions. Refer to Procedure 011-009 in Section 11.


Turbocharger is worn or damaged

Check the turbocharger for damage. Measure the turbine and compressor wheel clearances. Refer to Procedure 010-039 in Section 10.

Last Modified:  16-Mar-2012