Re: Why do Valves Stick?

Posted by Ross On 2013/7/6 19:26:20

Another major modern reason for valves sticking is old gas. Often a car will fire up and run more or less OK on even 2 year old gas--for the first time. The following day it will not start because of the nasty nasty gum that has built up on the intake stems. I often cringe when I read ebay stories about barn finds that fired right up.....

Of course, "it has a stuck valve" is often a euphemism for "it has a burnt valve".