Are you sure that no leaks were coming from the center galley plug seals, engine top end not the coolants ones? This is a known issue and can look like the oil it is coming from the valve covers. Just a heads up is all, good work by the way. I am attacking mine next week along with the center seals for good measure. Along with the TSRM recommended $10.23 a piece x's 6 NGK Laser Platinum premium R series spark plugs. OUCH! I love my car though...drain my wallet bitch!