[Gregski]

since I could not tell where the coolant was going, I decided to give one of them Engine Block Testers a shot

You rent this kit from AutoZone or some other parts house, and you buy the fluid at NAPA, the fluid don't come with the kit

The point of this test is to see if there are fumes in the coolant, this would would tell us if the coolant is making its way into the combustion chamber or exhaust chamber I think

You remove the radiator cap and stick the tube in the radiator and run the engine while pumping the rubber thingie to bring some fumes inside the tube, the blue fluid will turn yellow if there are fumes in the coolant.