A cambelt is often ribbed and is placed on the car engine to keep the camshaft and crankshaft in sync as they should. For correct timing, the belt is placed in a very specific arrangement along one side of your engine. The Cambelt is designed to keep the bottom half of the engine in sync with the top half. It is an essential item.
For some vehicles, this can vary between 60,000 km and 180,000 km. Cambelts should be replaced after 90,000 km. The timing belt holds all the valves and pistons in your car together and also keeps them apart in a very careful way.