Mine leaked after changing the intake gaskets too... When you take the tube back out, wire wheel the whole thing down to steel and repaint it, because its going to rot more. Use High Heat Engine Paint not Krylon. Its probably seeping from one of the pits in the steel or something like that. I put gold (High Heat) RTV on the tube,then put the O ring on the tube then smeared that with the RTV, tapped both sides in until they wouldn't go anymore using a rubber mallet, and maybe a punch for the last few shots, I dont remember. Then to keep it neat I took a rag and just wiped whatever RTV seeped out of the joint off. So far I put a ton of miles on the car in the year Ive had it and no leaks.