I note that my Boxer has a crossflow radiator design whereas the hot water from the engine enters the radiator on the top left side into a tank, flows from left to right through the core into a tank on the right side. What puzzles me is that the cooled water has to somehow then flow back from the right tank to the tank on the left side as the outlet for the cooled water is on the bottom of the left tank below the hot water inlet. Most other crossflow radiators I have seen have the hot water entering the top of a tank on one side and exiting the bottom of the tank on the other side. My two questions are: 1) how does the cooled water flow back to the left side tank and ; 2) what prevents the hot water when it enters the top right tank from just flowing straight down that tank and out the outlet which is also on the left side on the bottom of that tank ? Does anyone know how it works ?