For those of you who have not taken any automotive courses, or are just unaware of what happens to make you move in a car 
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Good stuff, theres also other very usefull information on that site on how things work, power steering, brake system, turbochargers, cooling, as well as alot of non car related stuff.
Just type it in and learn, thats how i learned about cars
http://www.revetec.com/website/index.html
Dunno who’s seen this before, but an interesting alternative on how to build an internal combustion engine. Great graphics to explain how it runs!
How an internal combustion engine works; Cliff notes = Suck, squish, bang, blow…repeat