Close-up of serpentine belt, alternator pulley and spring-loaded…

Tight close-up inside an engine bay of the serpentine belt drive, showing the grooved alternator pulley, a smooth idler pulley and the spring-loaded belt tensioner with its center bolt, plus a section of ribbed belt routed around them. A black rubber hose crosses the lower right of the frame.

AI caption March 2006 · Photo 14 of 337