A timing chain is made from metal Advantages of Timing Chains Timing belts are made from rubber fortified with fiberglass, equipped with little teeth acting as gears to transfer movement from shaft to shaft. From then on, these belts gained greater popularity than the chain. Timing belts came along in 1940, when Pontiac released a 6-cylinder engine which utilized a rubber strap rather than a chain. Timing chains use a metal sprocket and chains to transfer motion from the crankshaft to the camshaft, and their tensioners depend on hydraulic pressure. However, since 1990, timing chains have experienced a resurgence among manufacturers such as Mercedes Benz, Volkswagen, and BMW. When timing belts came along in the 1940s, their popularity decreased, which is why those in auto mechanic college may encounter them less frequently in vehicles. Timing chains, similar in appearance to the chain of a bicycle and made from metal, were invented along with the internal combustion engine in 1890. Timing Chains and Timing Belts Explained for Those in Auto Mechanic School While the engine relies on a timing belt or a timing chain for the same purpose, there are major differences between these two parts, which drivers and mechanics alike should be aware of when maintaining a vehicle. Both are maintained by tensioners, which preserve the proper movement of the part. They work by synchronizing the rotation of the crankshaft (which moves pistons up and down within the engine’s cylinders) with the camshaft (which allows the inlet and outlet valves to open and close at the right time), permitting the right amounts of gasoline and air to enter the engine. Timing belts and timing chains both serve this function. As long as there have been internal combustion engines, there has been the need to power the engine in a synchronized manner to keep the vehicle running smoothly and safely.
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