The timing chain functions just as that a timing belt does. The difference between your two is simply the material and area. One is constructed of metal and the additional, a reinforced rubber. Though timing chains were utilized first, belts were introduced into automobiles in the 1960s. Belts are quieter and because of their material, less expensive to produce. Timing chains are housed within the 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 and crack. Within 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 a timing belt not absolutely all water pumps are driven by the timing chain. Examine your owner’s manual to determine what kind of timing operation your vehicle timing chain china utilizes because they can vary greatly from year to yr and by an auto manufacturer.