If you have an internal combustion engine that actually runs, then your camshafts are spinning twice as fast as your crankshaft. Change the rate at which either of the two spins in relation to one ...

Your engine depends on a single rubber belt to keep critical accessories spinning in sync. When that serpentine belt slips, cracks, or breaks, you lose power steering, charging, and cooling in seconds ...

Despite doing so much, most of us forget the serpentine belt even exists — let alone that its tension matters. But it does. A lot. Too tight and it'll grind bearings to dust. Too loose and you're ...