340 Overheat / Radiator Geyser

Dicer said
That is alot of big bubbles in the radiator neck....are the bubbles constant, maybe a quick test?
OEMTOOLS Engine Combustion Leak Detector

That tool...I never sausage a thing. Good to know. I'm gonna stick with the current plan first of thermo/rad flush. I'll try the tool next if I need to. Now that you mention it I don't remember seeing the bubbling yesterday when I ran it. Thanks