They are excellent at moving heat and keeping stuff cool.
Junkyard = Car Radiator = Cheap heat exchanger.
Plastic tubing with a reduction fitting all held together by clips and screw on clamps.
Yep. The other thought is to use the existing radiator and just mount it outside in the shade. I might need a larger pump to move the water longer distances, maybe.
Another thought would be to stick an AC unit in the water with it, then pull the heat off that way. Or something even weirder.
C