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.

Question 1: Does anyone know if the Gen 1 Duke 390 comes with undercut valve stems? Both the exhaust valves have a narrower ...

The 300hp 4.6-liter engine found under the hoods of S197 Mustangs is certainly the most potent bullet of any GT. The bottom end is virtually identical to the previous generation's modular engine, but ...

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 ...