Just changed out some leaking valve cover gaskets and noticed a light coat of oil in the runners of my lower intake?? Is this normal or should I be looking for something?
It is common for some oil to be sucked from the PCV valve into the intake, there would be a light coating in the upper intake as well. Some things may make it worse such as no PCV valve screen, no baffle on the lower intake, but if it is only a very light coating of oil, nothing to worry about.