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Must the Tensioner Pulley Be Replaced When Changing the Belt?

1 Answers

MacJasper

07/30/25 9:15am

If the water pump is driven by the timing belt, it is generally recommended to replace it along with the timing belt, tensioner, and tensioner pulley. If it is not driven by the timing belt, replacement is not necessary. Reasons for replacing the timing belt: The timing belt has a limited lifespan, and if it breaks, it may cause damage to the valves, pistons, and cylinder head. The repair costs in such cases can be very high. Therefore, it should be replaced periodically. Introduction to the tensioner pulley: The car generator tensioner pulley is used in the belt tensioning device of the transmission system. It mainly consists of a fixed housing, tensioning arm, pulley body, torsion spring, rolling bearing, and spring bushing. It automatically adjusts the tension force according to the belt's tightness, ensuring the transmission system remains stable, safe, and reliable.

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