![]() Since the timing belt or chain controls valve movement, a malfunction can cause the piston head and valves to smash into each other. With such interrelated elements, timing becomes crucial all valves must be out of the way so the piston can move up. To be more specific, as the valves open and close, they operate in the same cylinder space as the piston. The vulnerability comes from the fact that many of today’s vehicles have interference engines. This part may seem simple, but a broken timing belt or chain can handily obliterate an engine. Replacing Your Timing Belt or Timing Chain Note: To determine whether your car uses a timing belt or timing chain, consult the owner’s manual. More recently, however, manufacturers have improved chain technology–with noise and vibration reduction a priority–and modern vehicles can expect their timing chains to last as long as the car itself. Also, timing belts are less expensive and quieter than their steely counterparts, making them most automakers’ first choice until the 1990s. While a timing belt sits outside the engine, the timing chain needs lubrication from engine oil and goes inside. Before the advent of rubber, timing chains were used, and Pontiac first introduced the timing belt to American vehicles in the mid-1960s.Īnother difference between the chain and belt involves their location. A timing chain, then, involves an actual metal chain. As you might have guessed, a timing belt is just that–a closed belt usually composed of rubber. Much of the variation in these two parts come from the material used to make them. The entire system operates much like bike pedals, with tensioners and pulleys keeping accessories in place. This connection ensures engine valves open and closes at the appropriate times, allowing fuel and air to enter and be expressed throughout the engine. ![]() As an integral component of your car’s engine, timing belts and timing chains to the same thing – connect the crankshaft to the camshaft.
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