Experience long belt life with the 4 Seasons AC belt tensioner. In your vehicle, the drive belt or serpentine belt is the one responsible for driving the AC compressor and/or other auto parts such as the water pump, alternator, and power steering pump. In order to deliver maximum power to vital auto parts, the belt should be kept tight and firm and it is the job of the AC belt tensioner to keep it always tensioned and free from slacking. On older model vehicles, the alternator has a fulcrum that enables it to move outward to tighten the drive belt and clamped the bolt. But this has a drawback wherein the new belt can easily get loose after only a few miles as it wore rapidly and the alternator needs constant adjustment. So a solution was introduced, and this is by holding the alternator at a rigid mount and keeps the drive belt taut via the 4 Seasons AC belt tensioner. This has many advantages and one is, as the new belt stretches, the tensioner will automatically take up the slack so as to maintain the belt's firmness. Second, the tensioner prevents over tightening of the belt which is the prime cause of untimely alternator, water pump, and shaft bearings damage. And finally, because the belt cannot loosen, wear is greatly reduced as well as belt slippage is avoided. For a truly versatile and reliable belt tensioner, the 4 Seasons AC belt tensioner will give you that satisfaction. There is no better source where you can get this high quality auto product than here at our website.