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.

Virtually all current production-based cylinder heads incorporate a cross-flow design with intake ports (Photo B) located on one side of the head and exhaust ports (Photo C) on the opposite side. Some ...

Modern internal combustion engines — including those that run on diesel fuel — require a lot of special parts and systems to prevent dumping excess emissions into the atmosphere. Not only are those ...