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Old 05-23-2015, 11:41 PM   #1
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Stuck catalytic converter nut... Very annoying

So long story short the guy who owned the car before me had cat deletes on. When I bought it I insisted he 're install them so I could pass emissions. He did just that, but he stripped the nut and stud on the outer most passenger side, which is the annoying one. He used a 10mm and after careful wrenching, and heating and trying to cut it, it's completely stripped to nothing. Now I have a severe exhaust leak. I'm so fed up I'm just gonna take it to a shop and have them cut the nut off with a torch. And drive it home with only one nut holding the cat on. Can an exhausted leak break anything or cause and issues with the newer cars. It sounds like a squirrel is loose in my car whenever I rev it so it's been sitting. Click image for larger version

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Old 05-27-2015, 05:11 PM   #2
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Got it off. But now I have a broken drivers side ball and socket clamp. I see that jegs has them, what size clamp do I need? Is the pipe 3" stock?
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Old 05-27-2015, 06:15 PM   #3
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I did this install myself and this was a pain in the ***, I ended up just getting a saw and cutting the bolts


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Old 05-27-2015, 09:10 PM   #4
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Anyone know the ball and socket stock clamp size?
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Old 05-27-2015, 11:22 PM   #5
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Stuck catalytic converter nut... Very annoying

Aren't they 3in?


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Old 05-28-2015, 04:31 PM   #6
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You poor ba$tard

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Anyone know the ball and socket stock clamp size?
I feel your pain, I put a set of short tube headers on mine and that bolt, if I read correctly the one closest to the passenger fender broke on me!
I ended up welding a 3/8" s/s nut on the back side of the converter flange and dropping a bolt down through the top. It was a b!tch to start but I salvaged the converter!
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Old 05-28-2015, 04:58 PM   #7
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My cats were nearly impossible to get off


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Old 05-28-2015, 07:07 PM   #8
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I thought I was great with the first three the last one was like this is really tight, oh there she goes and them BAM!
The converters hit the garage floor from about a foot, I thought I might have broken the bricks in them the hit so hard!
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Old 05-28-2015, 07:11 PM   #9
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I also had problems with the bolts connecting the catalytic converters. Made a 2 hour O/R h pipe install into a 2 day install.
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Old 05-28-2015, 08:09 PM   #10
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Converter

Dude you are so screwed I dont think you can chase those threads. That stud is a real bear to get out we heated and used a air chisel and still couldn't get it out, three drill bits later we had a hole we welded a stainless steel nut to the back of and dropped a bolt through the top.
And that was not much fun to start either.
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Old 05-29-2015, 12:02 PM   #11
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As bad as all your horror stories are, I think mine was the worst. The guy who owned the car before me used a 10mm on the hardest one, all the way to the passenger side. And it was a b***h to get to. I had it cut off with a oxyacedaline torch, and it nearly burned a hole in my floor. Luckily the heat Sheild took the brunt and melted. Anyway I just hit it with some high temp engine enamel, and patched the heat shield with some heat shield tape. Car sounds absolutely demonic with the deletes and gt500 axel backs. I aleso have res deletes. I want to get the pypes x, but it was out of stock for months.
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Old 05-29-2015, 01:39 PM   #12
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XPipe

Did you take the battery and battery box out, you can get right down there if I remember corretly, takes some fanangling with a joint and an 18 " extension, but its not bad once your on it, and in my case snap it!
I too plan on getting an x pipe and will be putting new clamps on as mine has always had a small exhaust leak on start up which goes away after it warms up, which I blame on the clamps.
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Old 05-30-2015, 07:31 PM   #13
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Did you take the battery and battery box out, you can get right down there if I remember corretly, takes some fanangling with a joint and an 18 " extension, but its not bad once your on it, and in my case snap it!
I too plan on getting an x pipe and will be putting new clamps on as mine has always had a small exhaust leak on start up which goes away after it warms up, which I blame on the clamps.
Never thought of doing that. But regardless that bolt was seized. I got one new clamp and I'm gonna use some walker muffler cement to seal it better.
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