Oil or some type of fluid seems to be leaking out of those washer like seals, which I think are called gormets, on the valve cover. I think there are about 3 of them, one in the right hand corner, one in between the spark plugs, and one in the left hand side. I am wondering what these are called and where would I be able to get them at on the net by any chance. Also, do they hurt my engine/hp if they are leaking?