I've been getting burn't smells every once in awhile lately. Found this last night. Wondering is anyone can help me identify what this through the valve cover sensor? is? I'm at 16k miles and it looks like both valve covers are leaking in the same area. Passenger side is worse. I'm not usually a fan of taking all the time needed to have dealer repair; but in this case it's looking like a dealer repair item? Haven't been able to find engine diagrams that show what these through the valve cover items are.