Symptom Tree t049
| Cause | Correction |
|---|
Refer to Engine Noise Diagnostic Procedures — General Information at the end of this section before using this symptom tree.
|
Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF in the Troubleshooting and Repair Manual CELECT™ |
 |
|
Lubricating oil pressure is below specification |
Check the oil pressure. If the pressure is low, refer to Procedure 007-028. |
|
|
Lubricating oil level is below specification |
Check the oil level. Verify the dipstick calibration and the oil pan capacity. Fill the system to the specified level. Refer to Procedures 007-009 and 007-025. |
|
|
Lubricating oil is thin or diluted |
Refer to Section F. If the oil pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
|
|
Connecting rod capscrews are loose or not tightened correctly |
Check the torque on the connecting rod capscrews. Refer to Procedure 001-014. |
|
|
Connecting rod bearings are damaged or worn, are not assembled correctly, or are the wrong bearings |
Inspect the connecting rod bearings. Refer to Procedure 001-005. |
|
|
Connecting rod is bent or out of alignment |
Remove and inspect the connecting rods. Refer to Procedure 001-014 and the Shop Manual M11 and ISM Engines, Bulletin 3666075. |
|
|
Crankshaft journals are damaged or out of round |
Inspect the crankshaft journals. Refer to the Shop Manual M11 and ISM Engines, Bulletin 3666075. |
