Dirty truck engine front showing serpentine belt, idler pulley a…

Grimy engine-bay detail looking down at the front of a truck engine, showing the serpentine belt over a smooth idler pulley, a cast timing/front cover with an open filler neck, the A/C compressor at upper left and a coiled air line at right. Everything is coated in oily road dirt.

AI caption January 2004 · Photo 1 of 100