Cool Why Does My Serpentine Belt Keep Coming Off Ideas. This can be due to a problem with the belt tensioner, such as a broken spring or a seized. Web the serpentine belt need constant tension on the belt to keep it from coming off.
One symptom of a failing belt tensioner is a lot of noise from the belts. Assuming all has been well until recently, and now all of a sudden the belt is coming off, the only explanation is. Web if the belt is not breaking but just coming off, then more then likely your tensioner is not holding it tight enough.
