So I just put a new radiator and heater core in my 93 Wrangler YJ 2.5. I took the nuts off of the battery holder, took out the battery and unhooked the heater box assembly. I reconnected the heater hoses, filled the radiator and started it up. Now when I turn the heater on, antifreeze leaks from down behind my heater box down onto the floor. How can this be? The only way antifreeze gets into the heater core is by that one hose and that one hose does not appear to be leaking. The heater core I installed did not appear to have any damage....any suggestions???