Multi-angle valve jobs are the most common way to make a valve more aerodynamic and make the head more efficient. A multi-angle valve job puts extra cuts on the valve near where it mates with 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.

"After many years of involvement with the early automobile manufacturers, Harry Weslake founded Weslake and Company in 1934 to act as consultants to the makers of internal combustion engines. Over the ...

Four-valve-cylinder-head technology is the current darling of the O.E.M. auto industry, primarily because it allows manufacturers to increase power without using a turbocharger or experiencing the ...

Cut valvetrain weight and scream past redline. PBM's titanium valves for Chevy and Ford heads stabilize high-revving race ...

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 ...

I worked as a machinist in an automotive machine shop in the early 1980s before my career took me into the aerospace sector. The shop's high volume of mundane engine rebuilds and turning brake drums ...