Get an inspection mirror and a bright flashlight, and look at the small hole in the pump housing just behind the pulley. I'll bet you'll see a seep leak when the engine is hot and there's a little pressure on the cooling system. "New" is not necessarily "good". New pumps leak pretty often.
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!