Evan Purple240zt Posted December 3, 2007 Share Posted December 3, 2007 Alright, I got my new downpipe tacked together and ready for a full weld job. I have to weld in the O2 sensor bungs too, along with a tube for the dump on my wastegate. Now my question, my turbo flange is NOT flat at all, and it seems that nobody makes a gasket for it. Is it common practice to have the mounting surface machined flat after welding etc.... There is no way this won't leak without it. Thanks - Evan Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted December 3, 2007 Share Posted December 3, 2007 yes it is, if its warped. [not flat] Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted December 3, 2007 Share Posted December 3, 2007 the orange high temp RTV stuff is amazing.. a buddy used it on his turbocharger JET engine.. which was incredibly hot.. glowing red.. and the stuff sealed perfectly. we had to break the damn thing w a hammer to get it loose.. pretty much glued it in Quote Link to comment Share on other sites More sharing options...
jgkurz Posted December 3, 2007 Share Posted December 3, 2007 Alright, I got my new downpipe tacked together and ready for a full weld job. I have to weld in the O2 sensor bungs too, along with a tube for the dump on my wastegate. Now my question, my turbo flange is NOT flat at all, and it seems that nobody makes a gasket for it. Is it common practice to have the mounting surface machined flat after welding etc.... There is no way this won't leak without it. Thanks - Evan I recently welded up a downpipe and the flange warped as well. I just had my machinist surface it flat. I have not had to use any sealant. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted December 3, 2007 Author Share Posted December 3, 2007 My flange is warped BEFORE welding LOL. Thanks guys! Evan Quote Link to comment Share on other sites More sharing options...
olie05 Posted December 3, 2007 Share Posted December 3, 2007 maybe when you weld it it will be pulled back flat. But thats gotta be like a 1/1000000 chance. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted December 3, 2007 Author Share Posted December 3, 2007 maybe when you weld it it will be pulled back flat. But thats gotta be like a 1/1000000 chance. Good point, Ill grab a lotto ticket as well then. LOL Thanks for the chuckle. Evan Quote Link to comment Share on other sites More sharing options...
Clifton Posted December 3, 2007 Share Posted December 3, 2007 I would have it surfaced but you could do it yourself. Get something flat, I've used square tubing and put some sand paper on it. You can get spray adhesive if you don't have sticky back paper. It's a small area if you aren't removing much material. I did it on a turbo manifold and put another 60k on it with out a leak. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted December 4, 2007 Author Share Posted December 4, 2007 Hey what the heck, it sure can't hurt to give it a shot. We have a rather large belt sander at work that may do the trick too. Beats giving the machine shop 50 or more bucks. Evan Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted December 4, 2007 Share Posted December 4, 2007 Yes, it's pretty common. Especially if you are welding on the outside of the flange/tube or getting it hot. A machine shop can buzz it flat for you. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted December 4, 2007 Author Share Posted December 4, 2007 I am going to weld it a stitch at a time and work around the flange in a feeble attempt to get it half way flat. Evan Quote Link to comment Share on other sites More sharing options...
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