Firebird V6-191 3.1L (1990)
Drive Belt: Description and Operation
Serpentine Belt Routing
The engine employs a single serpentine drive belt which drives each of the engine-mounted accessories. The belt is wider than conventional belts due
to its "Poly-V" design, similar to six narrow V-belts joined at their sides.
Encircling all but one of the accessory pullies are six grooves which mate with the contours of the belt face. The exception to this is the coolant pump
pulley which is driven by the back of the serpentine belt and, consequently, does not require grooves.
All belt driven accessories are rigidly mounted with belt tension maintained by a spring loaded automatic tensioner.