So due to living in an area with colder climates about 6 months out of the year (November-April), I would be using this all but December-Feb. We (I think I talked two of my buddies into installing these) plan on making it easy to blow out the fresh water lines and heat exchanger. From what I am able to gather, the temps of the vehicle coolant should not damage this if the fresh water portion of the heat exchanger is dry.....Correct? There should be no worry of warping the plates?