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Can you remove studs from catalytic converter ?

Hey guys, I took my catalytic converters off to put on some test pipes. I might have to put my cat's back on for emissions testing. The question is, when

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Old 04-25-2012, 09:39 PM   #1 (permalink)
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Default Can you remove studs from catalytic converter ?

Hey guys,
I took my catalytic converters off to put on some test pipes. I might have to put my cat's back on for emissions testing. The question is, when i took the cat's off I broke the studs on both sides. Is it possible to remove the stud from the cat's so that i can bolt it onto the headers ?
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Old 04-25-2012, 09:41 PM   #2 (permalink)
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up drill it out
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Old 04-27-2012, 03:09 PM   #3 (permalink)
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You could probably hammer the broken stud out, then use bolts to secure it back up. Or yeah drill them.
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Old 04-27-2012, 03:36 PM   #4 (permalink)
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yea just drill em out! welcome to the fun of catalytic/emissions removal/install BS
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Old 04-27-2012, 06:25 PM   #5 (permalink)
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Any specifics i need to know while trying to trill it out ? drill bit size wise ?
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Old 04-27-2012, 06:46 PM   #6 (permalink)
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Originally Posted by halogodx View Post
Any specifics i need to know while trying to trill it out ? drill bit size wise ?
Make sure you drill directly in the middle. Start with a smaller bit then work your way up until the stud comes out. The reason you do this is because it will soften the metal on the bolt until it crumbles.

This shouldn't be too bad on the cat, but it was a huge pain in the *** when a stud broke on my stock manifold.
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Old 01-18-2013, 10:34 AM   #7 (permalink)
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What size bolt do I need to replace the stud? I broke the driver side top left bolt on the cat.
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Old 01-18-2013, 10:37 AM   #8 (permalink)
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Make sure you drill directly in the middle. Start with a smaller bit then work your way up until the stud comes out. The reason you do this is because it will soften the metal on the bolt until it crumbles.
You might want to use a punch to get a good spot to start drilling. Some cutting fluid (or wd-40 if it's all you've got) will keep your drill bits from getting chewed up. Slower speed is your friend here.
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Old 01-18-2013, 10:40 AM   #9 (permalink)
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I think you can just use vice grips and unscrew them can't you? I seem to recall some of the studs came off mine and some didn't.
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Old 01-18-2013, 10:42 AM   #10 (permalink)
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I think you can just use vice grips and unscrew them can't you? I seem to recall some of the studs came off mine and some didn't.
This could work too. Maybe heat up the flange too. I've also had good luck putting two nuts on a stud and loosening the first one, but I don't know if you've got room for that.
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Old 01-18-2013, 10:48 AM   #11 (permalink)
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is this the correct replacement stud? 2009 Nissan 370Z Stud - 6 x 35mm N 14 543 3
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Old 01-18-2013, 10:54 AM   #12 (permalink)
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Originally Posted by Chuck33079 View Post
This could work too. Maybe heat up the flange too. I've also had good luck putting two nuts on a stud and loosening the first one, but I don't know if you've got room for that.
thats very smart
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