The timing belt is made of rubber and runs over a collection of pulleys and gears. Its main purpose is to control when the engine’s valves open and close by rotating the crankshaft and camshaft. It’s a key piece of machinery that is subject to heavy wear and tear. When a timing belt becomes damaged it can have a serious negative impact on engine performance. In order for timing belts to perform effectively, it is essential that they are applied with the right level of tension. A timing belt tensioner prevents the belt from coming loose, ensuring that it is accurately synchronised at all times. Parts for All Cars stock a huge range of durable, top quality engine components for all makes and models. Find the perfect replacement for your car today!