Intake Manifold Gasket

Changing these intake manifold gaskets can be a pain and some can have even more labor hours to change them. To answer your question there is not a specified amount of time that these should be changed except when the part fails, this is the only time the gaskets should be replaced. As long as the mounting surface where the gasket goes is cleaned properly and the surfaces are plum, you should not have any more problems out of this gasket for at least 100000 miles