Hmmmm. I'm having an alternator belt issue too. Mine is squealing and coating the area with black belt residue. I've got a belt coming from Ames on Monday to replace the auto parts store belt. Likely will be the same belt. So there is an issue with the alternator pulley?
I was actually throwing belts for awhile. Ended up being that the replacement alt had a different pulley. Swapped the old pulley onto the new alt and prob solved.
seems I am having this issue as well. looks like the alt pully is sitting about 1/8th inch to far back. Not enough to throw the belt, but for sure squeals.
I would also check that one of your other belts is not the wrong size. I had adjustment and squealing issues on my Sprint until I replaces all the belts per the attached chart. Found out someone used the wrong belt size and it affected my overall tensioning. It doesn't take much.
thanks for that, but I will have to post a pic. as it seems the alternator is just a tad to forward so the alt pulley and water pump pulley are not aligned