I just put my cams back in my car two days ago and today i was driving home and could smell oil. I pop the hood and take the spark plugs out ans there is oil in the 1st and 2nd spark plug walls. It is also slightly leaking oil at the corners of the valve cover where the bolts come through. Valve cover gasket maybe? How much will this cost and will the oil leak back down into the head from the spark plugs?
2000 civic si

 

get a valve cover gasket set; it also comes with plug gaskets. Just b sure to use gasket maker on the corners where it indents for the camshafts

Gasket set +-30.00
gasket maker +-2.50

 

Yup, That's my guess too.

 

I found what it was. I forgot to put the 4 nuts under the plug wire cover back on. OOPS! I think the valve cover was also slightly off centered.