DD60 14L problem

Fire ring pushed out of the headgasket and has created a passage for engine combustion gasses to go into the waterjacket. Its ballooning the radiator so the cap is bypassing.

If it was your compressor the coolant would be in your air sytem and maybe a little in the crankcase but not the exhaust manifold.

I know its only a small consollation, but ive been there. Be glad you are aware of it while the truck still runs and can be kinda scheduled around instead of losing a load or two and having to do an overhaul out on the road after huge tow bill, while you stay in a hotel. If you arent near home, get there. Id deadhead personally. The harder the engine load the more coolant youll be pushing out.

Running hard throttle, heavy up big hills and lugging is what lifts studs and blows gaskets out.