The timing chain functions just as a timing belt does. The difference between the two is simply the material and area. One is constructed of metal and the other, a reinforced rubber. Though timing chains were utilized first, belts were introduced into vehicles in the 1960s. Belts are quieter and because of their material, less expensive 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 are located beyond the engine and have a tendency to dry out and crack. In the last few years, however, more vehicle manufacturers have integrated timing chains back into some vehicles with vast improvements like a reduction in noise and vibrations, different then a timing belt not all water pumps are driven by the timing chain. Verify your owner’s manual to determine what kind of timing procedure your vehicle utilizes because they may vary from year to 12 months and by an auto manufacturer.