dayco idler/tensioner pulleys are built with smoother surfaces and tighter dimensional tolerances, which translates to less vibration and longer belt life. In addition to stamped,. dayco nuline engine pulleys. With the increasing use of serpentine drive belts on late model engines, more idler and tensioner pulleys are being sold than ever before. as a complement to its accessory drive belts and tensioners, dayco provides a wide range of pulleys and idlers in stamped and formed steel, plastic and powdered metal, with.
