<<<<<<<<<<< Actually, this is the standard sign for worn stem seals. The reason is simple. When you turn off the engine, the oil in the heads sloowly leaks down though the valve stem seals. >>>>>>>>>>>> Actually, if you have standing oil inside the rocker covers that is above the level of the top of the valve guides, and leaking down through them, the bad stem seals are the least of your worries. Michael Roger and Michael in San Diego 67 Crown Convertible "Moby" 73 LeBaron Coupe "La Bomba" 56 Sedan