Car puking coolant

[Pedigry]

Yeah, I thought about doing a quick compression test. Figured if it's a leak, it will show up on one cylinder. There is also a gasket tester that you can put on the raidiator and pull air through it, it will change color and show whether it has combustion gasses in the coolant. It's called "block tester". I'm going to see if the local auto parts store has one for rent.