Genuine Gates Timing Belt Kit - K025244XS. We apologise in advance for any inconvenience caused. Article number of the recommended special tool. Controlling the timing of the engines valves, the Timing Belt (cam belt) is responsible for matching the speed of the crankshaft. It is essential that timing belts are changed at certain intervals as recommended by their manufacture. Leaving it too late, and you run the risk of the belt snapping, which can potentially cause severe engine damage costing hundreds to fix. Setting up the belt too tight can cause strain on other parts of the engine, whilst a lose belt can cause mistiming.