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Rattle in Exaust?

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Old Jul 11, 2002 | 12:36 PM
  #1  
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Default Rattle in Exaust?

Put about 600 miles on my baby last weekend & I think those damn Missouri back roads knocked something loose in my exaust. There's kinda a rattle, definately more prominent when it's in gear, and above 1500rpm.

Any Idea what is it and more importantly, how I can fix it?

Exaust is Flowmaster.

Thanks in advance for answering my stoopid question...... :D
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Old Jul 11, 2002 | 01:28 PM
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Default Re: Rattle in Exaust? (Jeff Wilson)

Have you jacked it up to take a look?

You may answer your own question.
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Old Jul 11, 2002 | 01:38 PM
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Default Re: Rattle in Exaust? (BostonVette)

I had an exhaust rattle on my 98 and it ended up being the weld on the cross support between the catalytic converters had broken loose. I had the dealer remove it. (They said it really wasn't needed) Hope that helps!
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Old Jul 11, 2002 | 01:46 PM
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Default Re: Rattle in Exaust? (jtk30093)

I had a rattle, and it turned out to the the E brake cable on the pipes.
jer
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Old Jul 11, 2002 | 03:00 PM
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Default Re: Rattle in Exaust? (BostonVette)

Have you jacked it up to take a look?

You may answer your own question.
Yep. Was underneath her for 1/2 an hour this AM checking everything out, all looks good.
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Old Jul 12, 2002 | 09:45 PM
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St. Jude Donor '06-13,'16-'17, '19
Default Re: Rattle in Exaust? (Jeff Wilson)

Yep. Was underneath her for 1/2 an hour this AM checking everything out, all looks good.
Ok, get back under there. Look at where the over the axle pipes from the mufflers bolt to the h-pipe/converter pipe. See the flange with the 2 bolts? There is one on each side. Shake the flange area hard. Look at the wield at the pipe to flange. The wield on the muffler flange will be ok. The flange on the cat converter side may be broken. THAT could be the cause of your rattle!

There are a bunch of C5s that have a bad wield here. There's talk of a recall because of this. Here's what my pipe looked like. Note how the wield didn't appear to stick to the flange.



Tom



[Modified by TCW, 8:59 PM 7/12/2002]
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Old Jul 13, 2002 | 05:47 PM
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Default Re: Rattle in Exaust? (TCW)

Had same thing happen to my flowmasters! Loose baffles inside, 1 year warranty only from flowmaster, you can buy new ones from Jegs for $219 ea. or just get a new cat back exhaust which is what I did. My advice would be to get the Borla Stinger exhaust before it goes up in price! I think Xtreme has them for $499. You can check your mufflers by hitting them from underneath they should rattle, mine did. Hope this helps, they are a bitch to get off if you want to save the over axle pieces.
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Old Jul 13, 2002 | 06:47 PM
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Default Re: Rattle in Exaust? (Jeff Wilson)

If you cant spot anything with the car on 4 Jackstands, have someone (who you trust) start up the car, put it in first and let out the clutch. This "realtime" use may show you the rattle. :smash:

vetterdstr :cheers:
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Old Jul 14, 2002 | 01:01 PM
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Default Re: Rattle in Exaust? (vetterdstr)

If your flowmasters are rattling like mine were, you don't even need to start the car, just give them a rap with your hand in the middle of the muffler they will rattle if broken. :yesnod:
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