I would think that if it were anything running off of the drive belt, the noise would fluxuate at least a little with an increase/decrease in engine RPM, but perhaps not. You might want to try spraying some belt grip on the drive belt and see if that makes any difference in the pitch or intensity of the noise- I had a bad belt tensioner and a bad pulley and in both instances, the noise coming from either changed slightly once I sprayed the belt, and that's how I was able to isolate the source of the noise. Just a thought. |