Quote:
Originally Posted by Doctorjobj
So I know that you are supposed to fill your coolant by starting the engine and letting the air work itself out of the system. My question is that with the engine running should there be coolant flowing into the overlow tank? If so is it all the time or only when the thermostat is open?
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The coolant will flow in and out of the tank depending on temperature and pressure. It does not flow through the tank but in when hot and gets sucked back into system when cold.