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How do you fix exhaust leaks?

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Old 04-16-2010, 08:03 AM
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Default How do you fix exhaust leaks?

What do you guys do about getting slip fittings to stop leaking? I have a couple that can't be welded and tightening the exhaust clamps doesn't help.
Old 04-16-2010, 08:07 AM
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Sometimes you can take the clamp off, wrap a layer of tinfoil around the joint, put clamp back on, tighten down.

Mine used to leak to until I just went bezerk with a impact gun on them. Tightened the down like a @#$%#!#^@.
Old 04-16-2010, 08:52 AM
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Try some exhaust putty. I used some 2000 degree stuff from advanced auto and it worked great.
Old 04-16-2010, 09:33 AM
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Originally Posted by AFASTYZFR1
Try some exhaust putty. I used some 2000 degree stuff from advanced auto and it worked great.
Did you apply it around the outside of the joint or did you take the joint apart and put it on the sliding surface?
Old 04-16-2010, 09:36 AM
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Originally Posted by mike13
Did you apply it around the outside of the joint or did you take the joint apart and put it on the sliding surface?
I put it on the outside of the joint, put clamp on, and tightened it down while it was wet.
Old 04-16-2010, 03:17 PM
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I did the same last summer. Car sat all winter from October to last week and it sounds like it needs a touchup. I can live with having to apply more once a year if that's what it takes to quiet them down.
Old 04-16-2010, 03:22 PM
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take a torch and start burnin ****.
Old 04-16-2010, 04:04 PM
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I've heard about trying teflon tape under the clamp too. It's supposed to be good up to about 600ish degrees so I figure it'd probably work on everyone except maybe right at the header. I'm not real sure how hot that gets.
Old 04-16-2010, 08:07 PM
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A good amount of rtv high temp silcone between the slip joints works well.
Old 04-17-2010, 07:48 PM
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I'm so tired of leaks poluting my 02's and wideband. I think when I make my true duals I'm going to weld them right to the headers. If I ever want to take them off then I'll cut them off... and most likely get new headers since my coated pacesetters are getting pretty rusty.
Old 04-18-2010, 02:32 AM
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Why not just have flanges welded on at the header? Would probably be a lot easier if you ever needed to take it apart and with gaskets it should seal pretty well
Old 04-19-2010, 06:52 AM
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Ive been using high temp RTV on multiple engines for years with great results. I would highly suggest NOT welding the Y-pipe to the collectors. As soon as you do, youll need some form of minor repair that requires removing the exhaust
Old 04-19-2010, 09:18 AM
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i may have the same problem. i was gonna try some high temp flue tape.
Old 04-19-2010, 02:18 PM
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Oh I wouldn't recommend welding their exhaust to the headers to anyone else, lol. But I'm ready to build some true duals and I just don't want to drop the cash on some ball/socket connectors. My V-band clamps havent worked out too well for leaks, even with double nuts on them. Band clamps always leaked for me. U clamps not only leak, but crimp the pipes together.

So, next time I think I'm just going to weld them strait to the headers. I've already got to cut the Vbands out, and the headers haven't aged well, so I don't really give a crap about welding the stuff together. It ought to be leak free then! And seriously, if I need to take it off then I'll just sawzall or use an air cutter... then weld it right back. No gaskets, no sealer... and not really that much of an inconvenience for me. Heck, if I design the duals like my Y pipe then I can still take the trans out without dropping the exhaust.

...actually, I can't think of any reason that I'd need to drop the exhaust... unless I needed to change headers.

This is not a user friendly option if you don't have a welder and lots of air tools.
Old 04-20-2010, 04:47 PM
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Permatex Ultra Copper on the slip joint. It will look like ****, but that's better than a leak.



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