Sorry guys, but I didn't think about photo of valve train until I had the valve cover back on my wife's 2004 E60 with 155k miles. The Vanos unit was stained, but no sludge. Been running LL-01 oils at 6-7k OCIs. Replaced valve cover gasket that had turned hard as a brick. Had to use a sharp chisel to work the spark plug gaskets loose. While I was at it, I replaced the upstream O2 sensors and spark plugs. I told my wife she owes me $600, but it's probably more than that. She said "charge it." I'll find a way for her to pay!