Drive Belts, Mounts, Brackets and Accessories: Description and Operation

Accessory Drive

COMPONENT LOCATION - NATURALLY ASPIRATED VEHICLES









COMPONENT LOCATION - SUPERCHARGED VEHICLES









INTRODUCTION
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 primary and secondary drive belts. An automatic belt tensioner in each belt run maintains the drive belts at the correct tension. Together with idler pulleys, the belt tensioners also guide the drive belts clear of obstructions and set the correct 'wrap-around' of the accessory component drive pulleys to ensure a slip-free drive.

Primary Drive Belt
The primary drive belt is a six-ribbed poly-V belt that drives the:
- Coolant pump
- Power steering pump
- A/C (air conditioning) compressor
- Generator.

Secondary Drive Belt
The secondary drive belt is an eight-ribbed poly-V belt that drives the pulley of the viscous cooling fan. On SC (supercharger) vehicles, the secondary drive belt also drives the SC (supercharger).

Belt Tensioners
Each belt tensioner consists of an idler pulley on the end of a spring loaded pivot arm. The pivot arm can be turned for removal and installation of the belt.
Each belt tensioner is calibrated to automatically maintain the correct tension in the related drive belt.