The timing chain functions just as a timing belt does. The difference between your two is simply the material and location. One is made from metal and the other, a reinforced rubber. Though timing chains were used first, belts were timing chain china launched into 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 oil and can last a considerably long time, while timing belts are located outside of the engine and have a tendency to dry and crack. Within the last couple of years, however, more automobile manufacturers have integrated timing chains back to some vehicles with huge improvements like a reduction in noise and vibrations, different then a timing belt not absolutely all water pumps are driven by the timing chain. Verify your owner’s manual to determine what kind of timing procedure your vehicle utilizes as they can vary greatly from year to year and by a car manufacturer.