so i was taking the coolant inlet on top of the manifold off today, just to look/clean it, cause i'm one of those curious types of people, and i was taking off one of the bolts and i got it a few turns but then it broke off, so now there is no seal so when the engine runs it spews coolant everywhere, so does anyone know any easy or cheap fixes for this problem that will hold up (so no duct tape, or glue)
any tips would be appreciated

 

use an easy-out to get the broken bolt out

 

will that work if the bolt is stuck or should i put some bolt buster on it( like a penetrating catalyst of some sort)