how do cars bring in warm air from the engine without flooding the cab with any carbon monoxide? It has got to be all so close together, right?
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To add a bit of a tip for emergencies, if you find your engine overheating, blasting the heat will route the engine coolant thru the heater core and marginally drop the coolant temps.
Not going to magically save the day, but it will help a tiny amount in a pinch. Particularly if you’re stopped and the engine is at idle, rather than under load during driving.
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