Symptom Tree t050
| 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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Lubricating oil pressure is below specification |
Check the oil pressure. Refer to Procedure Procedure 007-028. If the pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
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|
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, Lubricating Oil System – Overview in Section F. If the oil pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
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|
Flywheel or flexplate capscrews are loose or broken |
Check the flywheel or flexplate and the mounting capscrews. Refer to Procedure 016-005. |
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|
Torque converter is loose |
Check the torque converter. Refer to the OEM service manual. |
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|
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. |
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|
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. |
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|
Crankshaft journals are damaged or out of round |
Inspect the crankshaft journals. Refer to Procedure 001-016. |
