What kind of noise? If it's a grinding or knocking noise, it could be the compressor coming apart inside. If it's a squeal it is the serpentine belt slipping. Dribble a little water on the smooth backside of the belt while the noise is occurring. If the noise changes, look for a pulley that is out-of-alignment with the rest of them. That will cause the belt to slide sideways across it as it goes around it, and that will set up a horrendous squeal. As you sight down from on top, if the belt is peeking out on the side on one pulley by as little as 1/16", that is enough to cause a problem.
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Tuesday, September 17th, 2013 AT 11:57 AM