You'd be amazed (I know I was!) at the number of parts that go into a four cylinder engine. Here's a cool animation from Ford of Germany showing how it's done: http://www.youtube.com/watch?v=D4vXU7DJEfY Great little movie and a wonderful company. Hey! They send me a retirement check every month!!! If you're really interested in watching more of this kinda stuff, from the Ford video you can find similar stuff from Mack, Mercedes, Ford (again) and others. Enjoy!