Wheres' a good website to learn about car engines and parts?

Car Engine Websites

Best site is.. www.auto.howstuffworks.com

Just enter "car engines" in the search bar

Also if you have a specific car you wish to learn about use the following:

http://arrc.epnet.com/autoasp/index.asp?sid=15191483&uid=s6467521.main.autorefctr