Coolant Overflow Catch Can (small version)

[ERA Chas]

Originally Posted by patrickt

Or, I could just bet him on what comes up the most in the myriads of car and engine forums if he just Googles "what causes coolant coming out the overflow tube?"

So that must be an empirical fact because of its frequency on the internet.
Propagated by geniuses like you.
You find blown gaskets by leak-downs, the exhaust and the dipstick.
Stick to your air bleeds.