Rocker cover gaskets

Replaced the cork gaskets on the rocker arm covers with some silicon gaskets. These are supposedly more robust and since they are resistant to high temperatures they will last longer and you can tighten them up if they start leaking. Sounds good. Old vs new - left vs right.

This was obviously pretty easy, but noticed that cylinder #4 is different and the gaskets are not centered and don't seem to fit the cover. Doh.
You can see that the gasket sags. This gasket was the same size as the other ones, what worries me is that it looks like the cylinder is different than the other three. Hopefully though, it's just a fluke and that gasket is screwed up. 

On another note, I started drilling out some rivets in the upper gussets that connect the subpanel. My new angle drill is a new favorite. It cuts through aluminum and rivets like butter - plus it can get into really tight areas where my regular dewalt never could. I'll need to do some more drilling to completely remove it, but got a good start.