The timing chain functions just as that a timing belt does. The difference between your two is simply the material and area. One is made from metal and the other, a reinforced rubber. Though timing chains were used first, belts were launched into vehicles in the 1960s. Belts are quieter and due to their material, less expensive to produce. Timing chains are housed within the timing chain china engine and receive lubrication from engine oil and can last a long time, while timing belts are located outside of the engine and tend to dry out and crack. In the last few years, however, more automobile manufacturers have integrated timing chains back to some vehicles with huge improvements such as a reduction in noise and vibrations, different a timing belt not all water pumps are powered by the timing chain. Verify your owner’s manual to determine what kind of timing procedure your vehicle utilizes as they may vary from year to yr and by a car manufacturer.