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 various other, a reinforced rubber. Though timing timing chain china chains were utilized first, belts were introduced into vehicles in the 1960s. Belts are quieter and because of 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 vehicle manufacturers have built-in timing chains back to some vehicles with huge improvements like a reduction in noise and vibrations, different a timing belt not all drinking 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 a car manufacturer.