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Stripped nut on exhaust flange.

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Old 08-06-2014, 06:33 PM   #1
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Stripped nut on exhaust flange.

Hey guys, basically this all came about after I had it all installed I had a leak at the flange because I used the original gasket (they never game me a new one to start with) I know have a new gasket in but...

I over tightened the bolt trying to put on a new TRD Cat back. In the picture its the bolt on the left side and I can push it in and out when everything is aligned...

If i was to tap it out would the original bolt still work? Some what at a loss of what to do.

Edit: Bolt is new cause the first one was mangled, I was hoping the issue was just the bolt and not the welded nut as well but I did not get so lucky, only seems to have made it worse.
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Old 08-06-2014, 06:41 PM   #2
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that is a bummer, especially if the welded nut is also stripped...

for fixing, get a new flange bolt, it looks like it is long enough to use another nut stacked on top of the stripped one...you probably will have to drill out the old nut a tiny bit so the new one slips through without any interference so the threads don't get knackered..

and from now on you will need two wrenches to install and/or remove that one particular bolt/nut...

it is fixable...
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Old 08-06-2014, 06:48 PM   #3
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Yeah the bolt should still be usable but the problem is the last 1/4 inch or so is tapered down, I think ill do like you suggested just get a new bolt and washer, use the spring and have a nut/washer just outside of the welded nut

And yea ill have to drill out the existing welded nut... thanks man.

Edit: Ill pick up some copper rtv and throw it on the gasket to help seal the deal once and for all.
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Old 08-06-2014, 06:59 PM   #4
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because of the tapered end, I would suggest using a clamp to compress the spring a bit to make sure the new nut grabs beyond the tapered end, or you could be in the same boat as before...

you can do this.. just take your time....
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Old 08-06-2014, 09:11 PM   #6
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So, I drilled out the stripped nut and picked up a 10M bolt and hardware to match.. it seems to be holding in pretty good except I still have a lot of exhaust leaking, (same problem I started with) is it safe to run the truck with this going on?

I tried to pick up some Copper rtv ( http://www.amazon.com/Permatex-81878.../dp/B0002UEOPA ) But home depot did not have any, would this be the solution to my problem? Thanks.

Edit: Im not sure what the gaskets made of but is it something that will seal up over some time? Feels like if the entire assembly was pulled up a bit it would stop a majority of the leaking.
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Old 08-07-2014, 03:42 AM   #7
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thats where it leaking from? start the truck and see if you can feel exhaust leaking out from there
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Old 08-07-2014, 04:27 AM   #8
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I'd put a new gasket in
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Old 08-07-2014, 05:49 AM   #9
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It just looks from the picture that it is slightly off on the alignment, may be the angle of the picture, don't know...is it a doughnut gasket?
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Old 08-07-2014, 09:57 AM   #10
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Yeah its a doughnut gasket and it is a new one. I ordered some copper rtv, going to take it back apart and through a couple beads of that around and hope that helps.
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Old 08-07-2014, 10:03 AM   #11
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Any suggestions on how to pull the assembly up just before the flange? Everything sorta is where it is because of all the hanger brackets.
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Old 08-14-2014, 03:22 PM   #12
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It sounds like your catback is bound up on something unless the hangers are significantly misaligned. What I would do is disconnect the catback and install that pipe that is leaking first (if possible). start it up and test for leaks. then reinstall the rest. I haven't done it before, but usually, if something isn't fitting right, I tighten down the part that's having a problem first and work my way backwards.
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Old 08-14-2014, 03:24 PM   #13
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Quote:
Originally Posted by bldegle2 View Post
that is a bummer, especially if the welded nut is also stripped...

for fixing, get a new flange bolt, it looks like it is long enough to use another nut stacked on top of the stripped one...you probably will have to drill out the old nut a tiny bit so the new one slips through without any interference so the threads don't get knackered..

and from now on you will need two wrenches to install and/or remove that one particular bolt/nut...

it is fixable...
X2! I do that all the time when a bolt strips out.
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Old 08-16-2014, 07:45 PM   #14
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That joint is meant to flex. Gluing it up with gasket sealer is not a good idea.

When the welded in nut strips out you can drill it out and use a regular nut on the back side. It can be tough to compress the spring enough to get the nut on. I had done it with a large C-Clamp.

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