![]() ![]() Rough Idle: The crankshaft pulley is subjected to a high level of stress as the engine is idling.These type of vibrations are harmful to the engine’s accessories, the crankshaft, and other engine internal parts. The vibration will get harder as the RPMs get closer to the engine’s resonant frequency. As the harmonic balancer fails it will stop absorbing the crankshaft’s vibrations that are transmitted to the engine’s accessories. Engine Vibration: Crankshaft pulleys that have an integrated harmonic balancer will cause the engine to vibrate if the harmonic balancer or dampening system fails.This prevents the engine vibrations from transferring to the accessory driving belt. Most crankshaft pulleys have a rubber ring between the internal and external parts of the pulley to dampen engine vibrations which come from the crankshaft. The crankshaft pulley powers the driving belt as it distributes the crankshafts rotational force to the engine accessories (alternator, power steering pump, AC compressor etc…) via the driving belt. Some engines have an independent harmonic balancer with the crankshaft pulley bolted on to it while other types of engines have a dampener crankshaft pulley that is connected straight to the crankshaft by the timing chain sprocket or the timing belt pulley. The crankshaft pulley is mounted on the outermost part of the crankshaft, at the opposite side of the engine’s flywheel. They are much more than a simple piece of metal and are much more complex than most people think which can lead to severe consequences when damaged. Crankshaft pulleys are not like any other pulleys. ![]()
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