Serpentine Tensioner

Belt tensioner appropriately tightens the belt on the pulley to prevent its slipping off the pulley. This tightening is done by either spring mechanism or adjustable hinge. Belt tensioner that uses adjustable hinge are incapable of adjusting the tightening in different RPMs and this reduces the belt life time, Belt tensioners that use the spring mechanism automatically adjust tightening in different engine RPMs thus exerting an even pull on the belt which extends the belts life time.