So last night I replaced the valve cover gasket on my 07 jk. When I took it off I noticed a hole on the internal but didn't pay to much attention to it till I went to change the gasket and a piece of plastic fell out. It's about the diameter of a nickel and is right underneath where the breather hose is attached. I needed the vehicle so I put back together with new gasket. Here is a pic. Anyone ever seen this?