Here's the process of making this rotary valve engine with a different intake and an exhaust system. It wasn't easy to start ...

Join me as I tackle the challenges of repairing and rebuilding my custom rotary valve engine after a dramatic failed start and heavy smoke. Watch the detailed disassembly, from removing the covers to ...

Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.