I assume that you are talking about the fan assembly at the radiator, not the blower assembly for climate control.
If I'm right, sounds like it's time for a 'lectric fan conversion. Easier, cheaper and according to some: gives 0.1% increase in throttle response (butt dyno). Sorry, last part is an inside joke. There are threads on the subject.
Here's the one that contains the inside joke:
http://www.vehicross.info/forums/sho...t=electric+fan