golden eagle sells those "plugs"...its called cam seal plug. i got mine from them and it does wonders. you can actually see the oil stains on the block under that old plug. so get one of these...colors http://www.accountwizard.com/clients...lass=Cam+Seals
this is what it looks like...down at the bottom..."cam seal"
http://www.accountwizard.com/clients...goldeneaglemfg
easy to install...if ya need help we are here...plus i got mad pics of install