Just did a quick search for this topic and found suggestions ranging from using a dremel to cut out the old seal to using a screw drive to tap out the old seal. So, I've tried tapping out the old seal w/no luck and succeeded in breaking out the center of each seal. I then tried getting "under" the seal, unsuccessfuly, with a screw driver without messing up the valve cover. Can anyone tell me what the seals are made out of? And, if I were to "cut" them out w/a dremel, is there a way to tell when your close to the valve cover before you mar it? Thanks in advance for any input. I'm hoping to get this thing put back together in time to go to work on Monday....