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Worn out Idler/Tensioner Pulley Bearings??? Ck. that first for worn out bearings by removing the Serpentine Belt & working them back & forth by hand feeling for roughness or sloppiness & wobble. If Ur still getting cold air I doubt the Compressor is bad. These Belts,Pulleys & Tensioner are only good for about 100,000 miles. Caution! Take or Draw pix of how the Belt goes around everything before removing it. I think U'll find the Tensioner Casting has a "Square Hole in it that fits a 3/8" or 1/2" Breaker Bar with which U loosen the Belt by pulling Hard against it. The cost for parts is about $65.00 less New Belt. Don't forget to save Receipt & mark the mileage down when U change it. Good Luck John
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