The timing chain functions just as that a timing belt does. The difference between your two is merely the material and location. One is constructed of metal and the various other, a reinforced rubber. Though timing chains were used 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 timing chain china lubrication from engine oil and can last a long time, while timing belts can be found outside of the engine and have a tendency to dry and crack. Within the last couple of years, however, more vehicle manufacturers have included timing chains back into some vehicles with vast improvements such as a reduction in noise and vibrations, different a timing belt not all water pumps are powered by the timing chain. Examine your owner’s manual to know what kind of timing procedure your vehicle utilizes because they can vary greatly from year to year and by an auto manufacturer.