This YouTube animation shows the animated assembly of a solid model of a four-cylinder engine. It interesting just to see the number of fasteners, but it is worth waiting for the animation of the four-stroke cycle that occurs about two-thirds through.
Mechanical Design 101 is a collection of resources to educate, guide and perhaps inspire the mechanical designer. Please send me links to your favorite resources, and to interesting and useful examples of mechanical devices. I would also appreciate a note, if you see any errors. Thank you, Michael McCarthy