Valve cover oil fill cap. I'm going to write a FAQ on my web site on waterproofing. If you squirt a bead of silicon around the cap then twist it on it should solve that. _____Dan Nees_____ [email protected] Keep Scoutin' and I'll be Travelalling along! 3 Scout II's and still counting! http://members.tripod.com/~IHCaholic/scoutindex.html