Ok, well my dad and I just got done switching the t-stat out and when we went to bleed it (I have an 06 so i had to use a socket) we heard nothing and nothing came out and when my dad tightened it all back up he broke off the very top of the valve. Will it be ok since he did tighten it all the way? Also, can I just get a new valve or will I have to replace the whole housing?