I'm seeing the initial signs of surface corrosion on the aluminum/magnesium valve covers of my 2007 Coupe. The PS valve cover has some significant corrosion on the front end which is quite visible to the naked eye. Looks like I'll be spending some time this weekend cleaning up this surface corrosion and inspecting both valve covers thoroughly to see if there are other spots with signs of surface corrosion. I need to look over the intake manifold also.