Hello everybody,
I hope im posting under the right place here.
I have a 1990 s10 blazer with a lil less than 100K miles on.
Recently, the pipe that goes out of the manifold to the heater core started to leak from the manifold side. I applied epoxy glue several times and it worked for a while, then it would leak again. I cant tell how the pipe goes into the manifold? Is it fitted right in or it has some kind of connector and its screwed into the manifold?
Attached some photos of the area.
If anyone knows what this part is called or how i can remove it, I would be thankful.

Thanks in advance.