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Badly rusted exhaust line nut removal
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scudder
User
Jul 26, 2010, 7:53 AM
Post #1 of 9
(1783 views)
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Badly rusted exhaust line nut removal
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I have a 2007 Nissan Versa, ~60,000 miles, I believe it's a 1.8L, and it's the hatchback, not the sedan.
I have a couple of exhaust line nuts that need to be removed, and (suprise, suprise) they're badly rusted. The rear muffler on this (not that old!) car rusted out just past the joint between the exhaust pipe and the muffler itself, leaving the joint connected, which I obviously need to get off before I can replace the gasket and put on the new muffler.
I've used PB Blaster before to remove nuts, but do the experts that do this stuff all the time have any tips or hints? Judging by the service manual diagram the bolts are built into the exhaust line itself, so I'd really hate to have to cut them.
Also, does anyone know why they bother with two mufflers? Seems like a big money grab to me, considering the dealers I called wanted over $400 just for the rear muffler. Even online it's gonna run me like $350!
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chickenhouse
Enthusiast
Jul 26, 2010, 8:28 AM
Post #2 of 9
(1779 views)
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Re: Badly rusted exhaust line nut removal
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If the dealers price includes installation, I'd say go for it!
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 26, 2010, 8:30 AM
Post #3 of 9
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Re: Badly rusted exhaust line nut removal
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Exhaust work is not a back yard type job. You need an acetylene torch and impact tools. Sometimes you can get them apart by heating the nut with the torch but most of the time we just cut them off with the torch and replace them with new ones.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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scudder
User
Jul 26, 2010, 8:48 AM
Post #4 of 9
(1773 views)
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Re: Badly rusted exhaust line nut removal
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No, that price is for the part alone! I was afraid the words acetalyne and torch were going to come up,  guess I'll be shopping around for a good labor rate.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 26, 2010, 9:00 AM
Post #5 of 9
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Re: Badly rusted exhaust line nut removal
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Just take it to an independent exhaust shop and they will likely do the whole job for less than you are spending on parts. They have better sources. Midas will probably be the most expensive of them.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Sidom
Veteran
/ Moderator
Jul 26, 2010, 6:52 PM
Post #6 of 9
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Re: Badly rusted exhaust line nut removal
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As posted, you need the right tools for this job.
I'm not familiar with that exact set up but from what you've posted I would probably cut it off. If the nuts are in the new muffler, Then I'd replace just the bolts. If the nuts are in the old flange, I'd cut the nuts off the old flange & install new bolts & nuts....
I haven't pinged your IP but an 07 that rusted??? You have to be smack dab in the middle of the "rust belt",
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scudder
User
Jul 27, 2010, 6:38 AM
Post #7 of 9
(1741 views)
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Re: Badly rusted exhaust line nut removal
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haha...Rochester, NY, and now Madison, WI. Rust belt indeed.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 27, 2010, 11:12 AM
Post #8 of 9
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Re: Badly rusted exhaust line nut removal
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Greetings from RUSTO-CHUSETTS! Home of the "Blue Wrench" where Oxy/Acet is king!
That stuff is actually easy - just cut it all off or rusted nuts will remove while glowing red hot.
Now - Know this is 3,000 degrees F or more and one mistake with a gas line I'll hear the explosion from here.
This is not a good thing to learn the hard way or have to buy stuff to do this. If you have a cut off wheel and it's thru bolted and have room that could work.
Rust suks!
T
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dmac0923
Enthusiast
Jul 29, 2010, 2:38 PM
Post #9 of 9
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Re: Badly rusted exhaust line nut removal
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if you dont have a torch set up, how about a grinder with a cutoff wheel?? if you have room you can cut the shank of the bolt or the head or nut off one side and hammer and punch it out.
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