If it wasn't put in right the belt wouldn't fit right and you wouldn't be driving the car.I have seen those idler pulley nipples break off the front covers before. Sometimes if the pulley was put on too tight the nipples get weak and break. Also if there over tightened and you go to remove the pulley I have seen the nipples break.
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Monday, July 15th, 2013 AT 5:10 PM