What happens if the tensioner pulley fails?

1 Answers
DiOmar
07/30/25 6:40am
The effects of a failed tensioner pulley are: 1. Increased engine noise during sudden acceleration; 2. Engine timing misalignment; 3. Disordered ignition and valve timing; 4. Engine vibration and difficulty in ignition. The tensioner pulley is a belt tensioning device used in the automotive transmission system, mainly composed of a fixed housing, tensioning arm, pulley body, torsion spring, rolling bearing, and spring bushing. It can automatically adjust the tension according to the varying tightness of the belt, ensuring stable, safe, and reliable operation of the transmission system. The tensioner pulley is a wear-prone automotive component and requires timely replacement upon failure, along with an inspection of the belt for any cracks or deformation.
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