Symptom Tree t049
| Cause | Correction |
|---|
Refer to Engine Noise Diagnostic Procedures – General Information at the end of Section TS 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, Fuel Systems and Electronics, B5.9G, C8.3G, L10G-III, Bulletin 3666118. |
 |
|
Lubricating oil pressure is below specification |
Check the oil pressure. If the pressure is low, refer to Procedure 007-999. |
|
|
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 Procedure 007-999. If the oil pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
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|
Connecting rod capscrews are loose or not tightened correctly |
Check the torque on the connecting rod capscrews. Refer to Procedure 001-014. |
|
|
Connecting rod and bearings are damaged or worn, are not assembled correctly, or are the wrong bearings |
Inspect the connecting rod and bearings. Refer to Procedure 001-005. |
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|
Connecting rod is bent or out of alignment |
Remove and inspect the connecting rods. Refer to Procedure 001-014 and the B Series Shop Manual, Bulletin 3666017. |
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|
Crankshaft journals are damaged or out of round |
Inspect the crankshaft journals. Refer to the B Series Shop Manual, Bulletin 3666017. |
