looks like blowby to me, just coming from the wrong place
Just put an exhaust pipe on it and run it
more fun when full of liquid and you start it with boss standing in the way..
Really want to insert a Thar She Blows joke here
You mean that's not normal?
Was there any coolant left?! lol
Turns out the headgasket was fine.

Injector #1 had melted a huge hole into the coolant passage right at the base of the injector.