Symptom Tree t051
| Cause | Correction |
|---|
Refer to Engine Noise Diagnostic Procedures — General Information at the end of this section before using this symptom tree.
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Fuel grade is not correct for the application or the fuel quality is poor |
Operate the engine from a tank of high-quality fuel. Refer to Procedure 018-002 in the Operation and Maintenance Manual, Signature and ISX Engines, Bulletin 3666251, and the Operation and Maintenance Manual, Industrial and Power Generation, QSX15 Engines, Bulletin 3666423. |
 |
|
Injector is malfunctioning |
Perform the single-cylinder cutout test. Replace the injectors as necessary. Refer to Procedure 006-026. |
|
|
Piston pin or bushing is loose, worn, or not installed correctly |
Remove the pistons and inspect the piston pin and bushing for damage, wear, and correct installation. Refer to Procedure 001-043. |
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|
Cylinder liner, pistons, or piston rings are worn or damaged |
Check the pistons, piston rings, and cylinder liner. Refer to Procedures 001-043, 001-047, and 001-028. |
