Stop in for a cup of coffee

71GSSDemon said

Quick question.... how to tell if a thermostat is a 2 way or 1 way? Like how to tell if it will puke coolant into a tank, then pull it back in as it cools vs just puke on the ground if overcoming cap pressure then be low on fluid?

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Never heard of a 2 way thermostat. Its all in the rad cap. Mopar correct caps have a dangly bit, cup shape. Will burp air intil coolant hits it then closes. When it reaches rated pressire it will purge excess coolant into overflow. Then as it cools it will draw coolant back into rad.