Looking for a way to heat my garage. I've tried propane heaters, but the fumes really sting my eyes after a while so that's not a good option. Tried an electric water heater and a circulator pump feeding a Modine-style heater hanging from the ceiling, but the electric heater can't recover fast enough. So I had a new idea... I've got a couple V-8s kicking around. The temp gauge in my car always reads 190 or so, so I figure the engine is sort of a big water heater. I've run engines on stands before so I could check for issues before installing them, and thought, what if I put an engine outside the garage on a stand, and ran the radiator lines through the wall to the radiator on the inside of the garage? Put an electric fan on backwards to blow air across the radiator and into the garage. Let the engine idle outside, continuously delivering hot water to the inside. No more propane fumes - just clean hot air. Anyone tried that before?