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Howdy! It may be the belt, if it is not a new one, or even the belt/pulley combo if they are not a perfect fit. If you can still find a bar of Lava soap with pumice, rub it on the belt surface that runs on the pulley. If the sound goes away, all is good. If it comes back, then buy a new belt. JohnMaybe it is the H2o pump. But yes that's the area it seems the sound is immenating from. I had the pump replaced with an aftermarket Pully from MAF during the desmog.
So do you think it's the H2O pump or is there a bearing in the pully on the same shaft as the pump?