today i replaced my termostat...i also was going to replace my coolent. i drained out tthe coolent and replaced the trermostat. i them put new coolent in the recovery tank i then went to remove the bleed valve on the water outlet as i was doing so the top of the bolt borke off so now the srew is all the way in and the coolent will not go into the engine what can i do....is there anyother way to get the coolent in without useing the bleed valve??