We haven't done a good "Dewey spews a ton of info on one topic" in a while. With Warranty out, what better time than now to do it. This week Dewey covers all the basics of heat exchangers and how they work as it pertains to a Subaru (though the same principle works for all cars) . Lot's of great info in here. If you ever wondered about why radiators are different, where you need to put an oil cooler, or you are trying to just keep your temps down and not sure where to start, this is a good one!