Hope this picture turns out,
I also replaced my plugs this weekend, I noticed what looked like a vacuum hose coming up from the bottom of the engine on the right side, ending near the front most spark plug. The pic shows where the hose goes up under the valve cover...cover? My camera is facing the block with the radiator overflow reservoir at its back. Where does this hose go?
The gentleman who said that there was a nipple on that round flat thing on the right valve cover...I wonder if this goes there?.