Review on 🔧 Dorman 419-010 Automatic Belt Tensioner: Ensuring Optimal Belt Performance and Longevity by Mike Skinner

This item was easy to install: we'll see how long it lasts although it seems to be of good quality. It has a REALLY larger idler pulley on the right side, but I think it's this: for some reason, Dorman uses a lighter spring for tensioning, and they compensate by adding a larger diameter wheel. . My stock tension barely got past the serpentine belt teeth on the wheel to take the belt off when the Dorman block was installed. It had a lot more travel and was easier to move so it fit, but the larger wheel seems to compensate for the spring tension slightly. I installed it on a 2006 Jeep Grand Cherokee 3.7L.