Leaking a lot of coolant

Does anyone know what this leak is? Ive been looking all day online i cant find it.
I just had this truck at the dealer for 2 months while they replaced the short block. When i got it back 2000 miles ago i had an oil leak cause they reused an old cam sensor without an o ring. Now 900 miles down the road coolant poured out. Looks as if its coming from the front of the egr cooler that attaches to the water pump. At least thats what i think those parts are.

 

I dont believe its the fan, I spent hours looking at everything and it looks as if its coming from the circular tube that faces down from the egr cooler to the top of water pump. If i turn on the engine for a sec it starts pouring out of that tube. I added some more pictures.

 

It was a gasket that the KW dealer put on there when they did the short block. I took it to a rush truck center they took apart the egr cooler and replaced the gasket.