Drive Belt Rumbling

Drive Belt Rumbling Diagnosis





Drive Belt Rumbling Diagnosis

Diagnostic Aids
Vibration from the engine operating may cause a body component or another part of the vehicle to make rumbling noise.
The drive belt may have a condition that can not be seen or felt. Sometimes replacing the drive belt may be the only repair for the symptom.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This test is to verify that the symptom is present during diagnosing. Other vehicle components may cause a similar symptom.
3. This test is to verify that a drive belt is causing the rumbling noise. Rumbling noise may be confused with an internal engine noise due to the similarity in the description. Remove only one drive belt at a time if the vehicle has multiple drive belts. When the drive belt is removed the water pump may not be operating and the engine may overheat. Also DTCs may set when the engine is operating with a drive belt removed.
4. Inspecting the drive belt determines if the belt has a condition, which may cause a noise. Small cracks across the ribs of the drive belt will not cause the noise. Belt separation can cause a noise and is identified by the plys of the belt separating and may be seen at the edge of the belt or felt as a lump in the belt.
5. Small amounts of pilling is normal condition and acceptable. When the pilling is severe the drive belt does not have a smooth surface for proper operation and may cause noise.