The timing chain functions in the same way that a timing belt does. The difference between the two is merely the material and location. One is constructed of metal and the additional, a reinforced rubber. Though timing chains were utilized first, belts were released into vehicles in the 1960s. Belts are quieter and due to their material, less expensive to produce. Timing chains are housed within the engine and receive lubrication from engine essential oil and can last a timing chain china considerably long time, while timing belts are located beyond the engine and tend to dry out and crack. In the last couple of years, however, more vehicle manufacturers have built-in timing chains back into some vehicles with vast improvements like a reduction in noise and vibrations, different then a timing belt not absolutely all water pumps are powered by the timing chain. Check your owner’s manual to determine what kind of timing procedure your vehicle utilizes as they can vary greatly from year to yr and by a car manufacturer.