Timing Belt is a rubber belt which controls the timing of internal combustion engines. It is vital in the process of making the car run smoothly as it also ensures the crankshaft and camshaft rotate in synchronisation. A snapped timing/cam belt is uncommon however tension issues are more widespread. If the belt is too loose it will end up whipping around inside the engine which will cause a variety of knock on effects and if the belt is too tight it will put a strain on the bearings...