Cylinder head valves normally will not just bend unless the engine has experienced some sort of trauma. Bent valves can occur as the by-product of a timing belt failure, as the valves strike the ...

Our mechanic takes us through the cylinder head and valve train and continues his explanation of how engines really work. The Mechanic is the kind of chap who eat, sleeps and breathes engineering.

Good cylinder heads, like good food, require the right ingredients and a knowledge of how to combine them. Handle them poorly and your Grade A heads could end up like day-old meatloaf. In HOT ROD ...

Pontiac's Super Duty 4-cylinder engine has established a formidable success record across a broad spectrum of motorsports competition. It has become the dominant powerplant in NASCAR's ...