Put a baffle( at least covering one inch each side of the valve itself ) under the PVC hole first Then do a leak down test or put a new plug in that hole and go drive it softly for 20 to 30 kilometers, no WOT Then look at the plug when you get back If it is still oil soak look deeper

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)