The timing chain is an important part of many combustion engines and ensures optimal interaction between the mechanical engine parts. It is located next to the cylinders in the engine, where it is inserted into the gear rims of the camshafts and connects the crankshaft with the two camshafts that control the valves of the engine.
A timing chain is made of metal, similar to a bicycle chain. A timing chain runs inside the engine, as it needs to be lubricated by the engine oil. A timing chain typically needs to be replaced between 40,000 and 100,000 miles depending on the vehicle.