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Old 10-29-2012, 08:26 AM   #1
Buckeyert
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Question 2001 Exhaust replacement

I stopped in a muffler shop(national chain) to get an estimate. $800+ so I decided I would tackle it on my own. All the parts are ordered and came in today. I have a question, the three studs on the flange after the cat, are they pressed in? I am guessing they are rusted badly so I will need to replace them. Any insight on this would be great! They rest looks straight forward.
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Old 10-30-2012, 03:41 AM   #2
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Default Re: 2001 Exhaust replacement

Use some PB Rust Blaster or similar to help break them loose, then you should be able to unscrew them. Basically it's penetrating lubricant with a freeze that creates microcracks and then uses them to get the lube deep down. I've used it on some pretty stubborn stuff and was successful.
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Old 11-21-2012, 07:37 AM   #3
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Default Re: 2001 Exhaust replacement

WOW that intermediate pipe with the resonator is a huge PIA to get over the rear suspension.
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Old 02-26-2014, 06:46 PM   #4
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Default Re: 2001 Exhaust replacement

have the same problem.... are they BOLTS or RIVETS?.... mine are on connector pipe just before the muffler.... hate to beat on it and find out its threaded
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Old 02-27-2014, 03:48 AM   #5
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Default Re: 2001 Exhaust replacement

Bolts for sure.
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Lost: '11 LTZ RJT V6 / A6 in flood at 44K miles
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Old 02-27-2014, 05:18 AM   #6
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Default Re: 2001 Exhaust replacement

three bolts that were not pressed in. Maybe mine was so rusted but the bolts actually sat in a U shaped slot.
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Old 02-27-2014, 09:29 AM   #7
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Default Re: 2001 Exhaust replacement

Don't bother with PB Blaster or Kroil or anything like that, use a torch to get the nut hot and then try again. The heat will expand the nut, breaking whatever bond has occurred between it and the bolt.

Having taken off more than my fair share of rusted bolts/nuts any time you can use heat, do it. If you can't use heat, use Kroil. Oddly enough, when I was in the USAF the guys in the jet engine shop used plain hydraulic fluid.

Good luck and watch your knuckles.
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Old 02-28-2014, 07:20 PM   #8
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Default Re: 2001 Exhaust replacement

Got it out.... It's a pressed in stud, just like wheel studs... Really hard steel.....
Thanks for the replies
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