The timing chain functions just as that a timing belt does. The difference between the two is merely the material and location. One is made from metal and the additional, a reinforced rubber. Though timing chains were utilized first, belts were introduced into timing chain china automobiles in the 1960s. Belts are quieter and due to their material, less costly 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 can be found outside of the engine and tend to dry out and crack. Within the last couple of years, however, more automobile manufacturers have integrated timing chains back into some vehicles with vast improvements like a reduction in sound and vibrations, different then a timing belt not all drinking water pumps are driven by the timing chain. Check your owner’s manual to determine what kind of timing operation your vehicle utilizes because they may vary from year to year and by an auto manufacturer.