In most vehicles, the timing belt is housed toward the front ... the other end connects to an external pulley on the front or side of the engine. As the crankshaft rotates, its pulley spins.

timing belt tensioner, idler gears or pulleys, water pump, gaskets, O-rings and seals and other hardware. Whether you or your mechanic replaces the timing belt, it’s always a good idea to ...

[Scott Swaaley] needed a bunch of timing pulleys for the clock he was building. He had already decided on the MXL profile, but he needed so many of these toothed pulleys in so many configurations ...