The timing chain functions in the same way that a timing belt does. The difference between your two is merely the material and location. One is constructed of metal and the other, a reinforced rubber. Though timing chains were utilized first, belts were launched 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 considerably long time, while timing belts are located beyond 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 huge improvements such as a reduction in sound and vibrations, different then a timing belt not all drinking water pumps are powered by the timing chain. Verify your owner’s manual to determine what kind of timing operation your vehicle timing chain china utilizes as they can vary greatly from year to year and by an auto manufacturer.