I made a flat cover that connected to the studs on the top of the engine with standoffs, I did give it a slight curve but it still vibrated such that I could hear it while driving.
On it's 1st run out it snapped the top of the stud off, I haven't attempted another yet.
On the face of it the case for a cover seems common sense but I am now not convinced a cover is worth it. There must me lots of GDI's out there with no cover that have no issues, mine included which has done 40k miles, I am sensible when washing it and put something between the louvers and the engine but when driving in rain the heat from the engine will burn off any water that gets in.
Likewise me.
However, I still get a couple of plugs showing surface rust when I remove them for checking each year. It has always surprised me that water can even get down the plug holes as the plug leads are always a really tight fit to remove.
When you say “no issues” are you saying your plugs are in “like new” condition?
