Drive Belt Whine

Drive Belt Whine Diagnosis





Diagnostic Aids
The drive belt will not cause the whine noise.
If the whine noise is intermittent, verify the accessory drive components are not the cause, by varying their loads making sure they are operating to their maximum capacity. An overcharged A/C system, a power steering system restriction or incorrect fluid, or a failing generator are suggested items to inspect.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
3. This test is to verify that the noise is being caused by the drive belt or the accessory drive components. With the drive belt removed the water pump may not operate and the engine may overheat. Also DTCs may set when the engine is operated with the drive belt removed.
4. The inspection should include checking the drive belt tensioner and the drive belt idler pulley bearings. The drive belt may have to be installed and the accessory drive components operated separately by varying their loads. Refer to the suspected accessory drive component for the proper inspection and replacement procedure.