Sounds like you have the same problem i had! Well here is how you fix it. Take a look at the belt tensioner and check to see if it looks like it's wobbling slighty, if so replace the tensioner pulley and belt. Also it would be a good time to flush the cooling system. My constant leaking pumping turned out to be a warped pump housing! i kept replacing the impellar side of the pump and just like you after a couple months or so it would start leaking, take the housing off and check for warping or damage around the surface.
Let the modding begin!
