I hate to go get a new pump, Mine is supposed to have a lifetime warranty, I don't have the receipt anymore though
after the majority of the noise went away for a week I tossed it out, then did a U turn that night and heard the loud groan
Maybe I'll still be able to exchange it if I decide I have too, I am putting a new belt on today so maybe that will help, old one is a little stretched so maybe that has something to do with it.