The normal operation of the engine depends on the preci […]
The normal operation of the engine depends on the precise time between the various components, this time with such as each valve opening and closing time and spark ignition time is the engine Rubber Timing Belt to ensure.
The gears of the crankshaft and the gears of the camshaft are connected by means of a certain mechanical means. The most commonly used is the belt or chain, which is the so-called timing belt and timing chain. Since the mechanical connection of the crankshaft and the camshaft must be accurate, there can be no change in position with each other, so the timing belt is lugged, so that it will not slip at work.
The timing belt is responsible for the precise coordination of the key parts of the engine, so it is essential for the normal operation of the engine. Once the timing belt is damaged, the valve, the ignition work will stop or mess, the engine will not work. When the timing belt is broken, the valve will stop at the lowest point due to the stop of the camshaft due to the inertia crankshaft driving the piston to move up and down. When the piston of the cylinder moves to the top dead center, The valve collisions, the top of the valve is a solid cam, can not exercise, the result is the valve stem was hit, the piston top was hit concave, serious situation cylinder head will be damaged. As long as this happens, the engine will need to overhaul.
Due to the importance of the timing belt, the manufacturer usually determines the recommended service life according to the design and the actual situation, and it is recommended to change the timing belt when the recommended life cycle is reached. This replacement cycle is clearly indicated in the car's manual and maintenance manual. The timing of the car's rubber timing belt is generally between 60,000 and 120,000 miles. Of course, usually for safety, manufacturers recommend the replacement cycle has a certain margin.