Update your vehicle with optimized drive belt tension, with the Dayco 89481™ Heavy Duty Belt Tensioner that ensures you're Ready for the Road Ahead™. Due to its straightforward design, this replacement tensioner is able to help create the correct amount of tension on drive belts, delivering ample amounts of power to engine accessories such as water pumps, AC compressors, steering pumps, and alternators. Possible symptoms of a tensioner that needs to be checked or removed include engine squeals, chirps, rattling sounds, or visible frays on belts. FleetPride is your First Click in Heavy Duty®.