[richtazz]

the other bolt is a stud and nut, and the back hole in the t-stat housing is slotted. All you have to do is loosen that nut, then you can wrestle the housing out, without having to totally remove the rear bolt. As far as the cracked intake around the bolt, if you use teflon pipe sealer on the threads it should be ok, as long as the mounting surface is still flat and not deformed from the crack. After replacing the t-stat, don't forget to bleed the air out of the system, or you'll risk overheating the engine and blowing a head gasket.