The timing chain functions in the same way a timing belt does. The difference between your two is merely the material and area. One is made from metal and the additional, a reinforced rubber. Though timing chains were utilized first, belts were launched into vehicles in the 1960s. Belts are quieter and timing chain china because of their material, less expensive to create. Timing chains are housed within the engine and receive lubrication from engine essential oil and can last a long time, while timing belts are located outside of the engine and have a tendency to dry and crack. Within the last few years, however, more automobile manufacturers have integrated timing chains back into some vehicles with vast improvements such as a reduction in sound and vibrations, different then a timing belt not all water pumps are driven by the timing chain. Examine your owner’s manual to know what kind of timing procedure your vehicle utilizes as they can vary greatly from year to season and by a car manufacturer.