A Timing Chain synchronizes the rotation of the crankshaft and camshaft(s) ensuring proper timing. And, allows the engine’s valves to open and close during each cylinder’s firing.

Timing Belts-Chains Or Gears – All Do The Same Thing, Differently
So, timing belts-chains or gears, all perform the same function. Consequently, their job is to synchronize, the rotation of the crankshaft and camshaft. But, despite having the same functionality, timing belts-chains or gears, are unique […]