i didn't know about the wd40.. hopefully it will be ok. never will I do that again. IF the alternator goes out, i'll chalk it up to another lesson learned the hard way. I did go out and turn on the hose and let a little bit of water hit the tensioner pulley. the sound cleared up totally for a minute, then came back. I'm gonna change the tensioner pulley before i take it in somewheres because i know they are gonna try to tell me that is the problem. Hopefully it is the problem, and i won't have to take it in. I did turn the tensioner pulley by hand, i guess it is ever so slightly gritty sounding. nothing major though.