I have seen lots of info on here and online about Harrison Tank plumbing to the motor, but I have a question I have not seen covered.
If I understand the operation of the expansion tank properly, I don’t think the overflow (radiator cap pressure release port) should be connected to an overflow tank with
antifreeze in it. Because every time the motor cools and the cooling system retracts it continually draw from the overflow reservoir, backfilling the expansion tank, negating its whole purpose. So I am going to run the overflow tank dry, basically catch can. That way the cooling stays with the same water volume. If it does expand in the tank and run to the overflow, it will only draw back in to its original water volume.
Am I thinking this correctly?