Guest ON3GO Posted January 25, 2005 Share Posted January 25, 2005 ok so i have a exhaust leak right BEFORE my turbo.. coming from the exhaust manifold to the turbo. its a new gasket and etc, i tighened all the bolts as tight as i could get it and it still leaks. now im going to the track to do some shake down runs this weekend and i want to do a quick fix to it before the track. and when i have time ill do it correct. but can i just put some JB weld where the two flanges meet? think it will work? just as a quick fix so i can boost better at the track. mike Quote Link to comment Share on other sites More sharing options...
datsunlover Posted January 25, 2005 Share Posted January 25, 2005 I dono man.. if the JB weld seeps into the crack, leaks a bit inside, and hardens, it'll probly create a bit of a restriction in there.. and posibly (from my thnking) break off and toast the turbo.. imagine a hardened piece of JB weld the size of a ball bearing flying around in there.. Quote Link to comment Share on other sites More sharing options...
wheelman Posted January 25, 2005 Share Posted January 25, 2005 I checked the JB Weld website and they say it can withstand 500 degrees F for long periods and 600 for up to 10 minutes. I don't think it will hold very long at the temps a turbo exhaust manifold sees. What about welding up the flange and then grind it flat so the gasket seals it? Would be more of a permanent fix but take longer to do. Wheelman Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted January 25, 2005 Share Posted January 25, 2005 it will then make the turbo welded to the mani.. which i dont want. im just trying to think of a easy fix before i can fix it for real... track is this weekend.. not that ill run good anyways as i have bald tires and only stock boost. mike Quote Link to comment Share on other sites More sharing options...
wheelman Posted January 25, 2005 Share Posted January 25, 2005 No I didn't mean weld the turbo to the manifold but weld on the maiting surface of the flange then grind it flat so the gasket has a good flat surface to seal to. After I suggested it I thought about how hard it would be to get a good flat surface the gasket would seal to so maybe it's not such a good idea anyway. Wheelman Quote Link to comment Share on other sites More sharing options...
Z-TARD Posted January 25, 2005 Share Posted January 25, 2005 You might not even have to weld on it before grinding. If the surface is thick enough, maybe just a few thousandths taken off with a belt sander (steady hands here.... )might be enough to make it seal. If not that, maybe trying two gaskets instead of one? I dunno, thats all I can think of for now. Mike Quote Link to comment Share on other sites More sharing options...
peej410 Posted January 25, 2005 Share Posted January 25, 2005 its probably not the easiest answer, but if you pull the manifold youll be able to check the flange to see how warped it is, if its warped take it to a GOOOD machine shop and ask them to mill it just enough to flatten it out. make sure to cross torque your bolts just like you would wheel lug nuts, IMO thatll leave no way for the flange to warp again, also make sure to check the mating surface on the turbo it might not be the manifold at all Quote Link to comment Share on other sites More sharing options...
blueovalz Posted January 25, 2005 Share Posted January 25, 2005 The J-B Welds material gets softer the hotter the part becomes. My experience with this product is that it also looses it's bond when the metal get hot (And in my case, hot was not 500º, but more in the neighborhood of 350º-400º). I would not consider this as a quick fix. Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted January 25, 2005 Share Posted January 25, 2005 JB weld will be blown out by the pressure of the exaust. Sorry to say it will not work. A better bet (very temporary) may be some of that resin / fibercloth wrap you can buy to fix exaust leaks. At least that way you can wrap it around, and it will hold itself. Maybe JB weld then the wrap, but JB weld will not hold on its own....don't ask how I know..... Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted January 26, 2005 Share Posted January 26, 2005 i had jb weld hold up to 12psi + on my intake mani as i had some holes in that lol. i guess just no track for me this weekend. mike Quote Link to comment Share on other sites More sharing options...
80LS1T Posted January 29, 2005 Share Posted January 29, 2005 JB weld will hold the pressure but it sure wont take that heat. I had the same issue with my drivers side header on my car mating up to teh exhaust piping. Even with 2 gaskets in there it still leaked. I finally had to remove the manifold and have it milled flat. Problem fixed. I would take the turbo off and see if the turbo flange is warped or the exhaust manifold is warped. Maybe you'll be lucky and it will be the turbo and you can have that milled flat? Atleast then you wont have to take off the exhaust manifold! Guy Quote Link to comment Share on other sites More sharing options...
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