Why not make a shroud to fit around the fan and draw air through the whole radiator? It's pretty basic sheet metal work that most anybody can do with a little planning, a pair of tin snips, and a rivet gun.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!