sounds like the bearing is shot that spins the blade... you might be able to go to a scrap yard for a new one...
...
just replace the whole thing. the fan housing/motor/blade. get one from a junk yard.
...
your radtior may be leaking... look for rust/or a burnt coolant substance on the side of the raditor. i blew a hole in mine about 1/4 big. i was impressed. i got up to 120+ when it said no more, i hate you, im blowing up now.
...