On: What to do about Detroit.

[potatolicious]

Your engine produces a massive amount of heat that must be vented. Your car pulls/pushes a large amount of air (using a motor + fan) through the front (or sometimes bottom, or sides) of your car through an array of metal fins that helps dissipate the heat.

[dhimes → potatolicious]

Thanks. I didn't know if you meant the fan-- I hadn't heard it called that. I got "water pump" stuck in my head...

[of course, the fans used to be driven by a belt from the engine ...]