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The serpentine belt is typically driven by the crankshaft, which is connected to the engine. As the engine runs, the crankshaft spins, thus turning the serpentine belt. This rotation powers the connected components, allowing them to function efficiently. The belt's tension is crucial; if it is too loose, it can slip off the pulleys, leading to ineffective power delivery; if too tight, it can cause excessive wear on both the belt and the components it drives.


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The tensioner belt pulley works by applying tension to the serpentine belt, compensating for any slack that may develop during operation. When the engine runs, various components attached to the serpentine belt may create fluctuating loads, leading to changes in belt tension. The tensioner’s spring mechanism automatically adjusts tension based on these variations, ensuring continuous contact between the belt and the driven components.


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