Symptom Tree t050
| Cause | Correction |
|---|
Refer to Engine Noise Diagnostic Procedures – General Information at the end of Section TS before using this symptom tree.
|
Lubricating oil pressure is below specification |
Check the oil pressure. If the pressure is low, refer to Procedure 007-037. |
 |
|
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 007-037 and 007-009. |
|
|
Lubricating oil is thin or diluted |
Refer to Procedure 007-083. If the oil pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
|
|
Main bearing capscrews are loose, worn or not tightened correctly |
Check the torque on the main bearing capscrews. Inspect the capscrews for wear. Refer to Procedure 001-006. |
|
|
Main bearings are damaged or worn, or the wrong bearings are installed |
Inspect the main bearings for damage, excessive wear, and the correct part number. Refer to Procedure 001-006. |
|
|
Crankshaft journals are damaged or out of round |
Inspect the crankshaft journals. Refer to Procedure 001-016. |
|
|
Flywheel or flexplate capscrews are loose or broken |
Check the flywheel or flexplate and the mounting capscrews. Refer to Procedure 016-005. |
