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The expansion tank is connected to the rad by a small bore ish pipe, and you disconectted the pipe and revved it and no water came out. Is that correct?
lynx-
Didn't rev it. Let it run idle and nothing was coming through but I've taken it all off and it's clear. Just checked the new thermostat which is supposed to open at 87 and it didn't start to open until 92. Would that lead to the rad issues? Also noticed that when engine was completely overheated no hot air was coming through heaters.
Jw89
Did I mention there is no liquid returning from rad to expansion tank? Pulled it off and not even any air