Description And Operation: Introduction: Notes

The accessory drive is a belt system powered by a pulley attached to the front of the crankshaft. The crankshaft pulley, which incorporates a torsional vibration damper, drives a single (primary) drive belt on NA (naturally aspirated) vehicles and two (primary and secondary) drive belts on SC (supercharger) vehicles. An automatic belt tensioner in each belt run maintains the drive belt at the correct tension. Together with idler pulleys, the belt tensioner also guides the drive belt clear of obstructions and sets the correct 'wrap-around' of the accessory component drive pulleys to ensure a slip-free drive.