[jdmccright]

Hmmm usually not that hard to loosen the clutch nut from the pulley hub. I've used a large adjustable wrench and a hammer. Usually comes loose with one or two good whacks. Again, keep the belt on and tight for this. When you do reinstall it, no need to tighten the hell out of it. Spin it on, use wrench and hammer to tap it tight. It won't come loose due to the engine spinning opposite the threading.

Double check that it isn't: A) the upper radiator hose leaking past the clamp, B) A loose or leaking water neck seal, C) Leaking water pump-to-block seals, or D) leaking/corroded heater core hose connector. Any one of those can look like the pump is leaking from the hidden/rear side.