• ACDelco Professional Heavy Duty Belt Tensioners And Pulleys Primary Image
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  • Labyrinth seal helps prevent contamination of internal parts for maximum durability and service life
  • Machined steel pulley helps minimize surface wear while shielding the internal bearing from outside contaminants. Double row bearings minimize friction for reduced bearing wear and noise
  • Round spring wire includes a chrome-silicone torsion spring for less flex-fatigue than flat-wire designs
  • Damping mechanism provides maximum stability, reducing vibration and increasing helping to maximize the life of belt, tensioner, and other accessory drive components


ACDelco Professional Automotive Belt Tensioners And Pulleys
ACDelco Belts And Hoses

The ACDelco Professional, premium aftermarket Heavy Duty Automatic Belt Tensioner is equipped with a design that provides superior belt alignment and tension to help optimize drive efficiency and life, and are the high quality replacement ideal for many vehicles on the road today. Its damping mechanism provides maximum stability, reducing vibration and helping to maximize the life of the belt, tensioner, and other accessory drive components. This premium aftermarket replacement heavy duty automatic belt tensioner is manufactured to meet your expectations for fit, form, and function.


Limited Lifetime Warranty*: ACDelco offers a Limited Lifetime Warranty on specific service parts. General Motors warrants to the purchaser that it will replace these specific Genuine GM Parts and ACDelco parts for all manufacturer defects in workmanship and manufacturing. Effective on parts purchased April 1, 2018 and later to the original retail purchaser. Contact seller for limited warranty part details, qualifications, and possible labor coverage.


Learn more about ACDelco warranties:


Are these pulleys durable?
Yes, pulley bearings meet original equipment and are designed for application specific speed and load requirements.

Are these pulleys interchangeable?
No, always use the pulley called out in the ACDelco Catalog for your application.

Will I know immediately if my pulley or tensioner breaks?
Yes, when your idler pulley or belt tensioner breaks, the belt no longer powers key systems within your vehicle. For example, the belt provides power to the alternator, power steering and water pump, so you may notice lights on your vehicle flickering due to the drain on your alternator, eventually leading to complete power loss, or your power steering no longer operating, or the temperature gauge reading increasing dramatically.

Are these tensioners durable?
Yes, a patented vibration damping system helps maximize not only tensioner life but also belt and accessory life as well.




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