I just got my 96 bird, replaced all of the radiator fluid (it was a nice rust color) also replaced the radiator (it had a few pin holes in the core), I could not get the thermostat presure releas bolt undone so i left it on while i re filled. Anyways, when i start my car (any time or temp) i hear the sound that if was spelled out phoneticly would be Guurgle-Guurgle from around the heater core. Also my fluid in the resivor seems to be disapering. The water pump is not leeking and i realy wanna solve this. Any help? Thanks!