Hmmm... I wonder if a factory thermostat would work and I could somehow modify it to open at a set time. Maybe this project is going to require an Arduino with a sensor, relay and e-valve. Didn't really want to do that, but if push comes to shove I just might.
oil pan, I like the idea of having the two coolers, my two issues are that I want it to be fully automated (anybody can drive the truck without 'forgetting' to open/close any valves), and that I am not going to use the factory cooler, to prevent any future damage, which means I would need two coolers.
In your scenario, how would you run the electronics/valves? Would you have some sort of temp. sensor with a relay to the valves? Is there a logic board in there somewhere?
EDIT: What about
this? If I sent this to a relay to open a valve, would that work for me?