I have a 1991 Toyota Corolla, and while I was tightening the coolant intake back down after changing my thermostat, broke one of the two studs that hold it down.

Now the coolant intake is spraying coolant all over the engine! Is there a way I can remove and replace the broken stud? What kind of tools will I need to do this?
Ayuh,.... No doubt the stud screws into whatever piece it is,...
If that is Aluminum, yer in a world of hurt...
Aluminum, 'n steel grow together over time,...
Hot heat, 'n patience might get it out...
If ya take the T-stat housin' off, How much stud is still stickin' up,..??
What is it screwed into, the motor's Head,..??
Is the area reasonably accessible, or under/ behind/ f*^%in' Hidden,..??
Could ya swing a BFHammer, 'n easily Wack it dead center, 'n squarely,..??