That's a neat idea.
I only have a few things bugging me about it. It may be tough to get the thermostat to open to circulate the coolant. When it does open, will the heat going through the heater core, without the fan running, warm the interior?
I was flushing the wife's radiator and adding new antifreeze the other day and got a kick out of something. The engine was warm so I assumed the thermostat would be at least partially opened. I removed the return hose from her radiator and connected a hose to it so the antifreeze wouldn't go everywhere in her engine compartment. Got the water hose over to the radiator fill and asked her to start the engine. I stood there and waited......and waited.....and waited some more---nothing was coming out of the return. The temp gauge showed normal operating temperature. I asked her if her heater was on---yep sure was. Her core was acting as a radiator so the thermostat was refusing to open. She turned the heater temp to cold and VIOLA, the nasty antifreeze began to emerge from her return hose.
So maybe I answered one question: you can heat the engine and the heater core without the thermostat opening.
That could be a solution for you Cannucks ay?
