When something starts to fail, you’ll hear a squealing sound from the tensioner. It doesn’t need to be oiled and it relies on automatic tensioners to hold it in place. There’s virtually no maintenance to perform with the timing belt. Additionally, the rubber material is going to be quieter while operating than the chain. On the other hand, the chain tends to be more durable but also costs more to make. The differences between the two based solely on the construction are profound.įor example, the rubber material is lighter, allowing for better fuel efficiency. In comparison, the timing chain is constructed from metal. It can also be made with neoprene or polyurethane containing corded fibers inside. The timing belt is made from strong rubber. You also want to look at the lifespan, cost of replacement and the location 1. When evaluating the differences between the timing belt and the timing chain, it’s important to think about the construction and maintenance requirements. What Are The Key Differences Between A Timing Chain and A Timing Belt? However, the lack of durability does lead to some disadvantages. The first engine mass-produced in America to have a timing belt was the 1966 Pontiac OHC. The belt was made by the Gilmer Company and the car went on to win the 1956 Sports Car Club of America National Championship. The first recorded use of a timing belt in a car engine was in the 1954 Devin-Panhard race car. Once combustion has occurred, the timing belt also ensures that the exhaust can escape from the engine. With the timing belt working as it should, fuel enters the combustion chamber at an appropriate level. It’s responsible for controlling the timing of the intake and exhaust valves. The belt connects the crankshaft and camshaft, providing the same functions as a chain. Either way, it has corded fibers within the belt to offer some reinforcement and provide tension. Some manufacturers prefer a neoprene or polyurethane construction instead. The timing belt is constructed of rubber material and it contains tooth-like grooves to act as the chain.
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