[b[they have a machine that makes smoke and pumps it into a vacuum line specifically to check for vacuum leaks. [/b]

Huh? How does that work. There is almost no way to ensure the entire intake is air tight. Even then you are pushing pressure the wrong way. Depending on the break in the gasket, it may only be able to leak under a vaccum.

Without knowing more, I would not put much faith in the magic smoke machine. <img src="/forums/images/graemlins/smile.gif" alt="" />

Michael