tail pipe vibration

tail pipe vibration

Postby 01safari [OP] » August 17th 2009, 1:35am

A while back I had an exhaust leak between the right side manifold and the crossover pipe. I snugged the nuts up and the noise went away. Lately the tailpipe vibrates enough to make alot of noise inside the van. It is really bad with the A/C on. I am not sure if it is an exhaust issue or just engine vibration getting amplified? I thought there was a service bulliten about it the exhaust, but can't find it.

any one else hving this issue?
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Re: tail pipe vibration

Postby 'cudapaul » August 17th 2009, 1:39am

Are you sure that it is the exhaust pipe?

There is a heat shield on the passenger side of the trans that is notorious for rattling at certain RPM's, usually just above idel. Might want to check it.
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Re: tail pipe vibration

Postby Big_kid » August 17th 2009, 3:24am

'CudaPaul is right. My old S10 had that rattle, the heat shield over the converter had developed a crack. My fix was to bend the two halves away from each other. That would work for a while, I did it two or three times. I eventually drilled a hole to keep it from spreading. That lasted for some time too. Eventually I cut off one corner of it(I think).
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Re: tail pipe vibration

Postby 01safari [OP] » August 18th 2009, 2:50am

Yes, it is the tailpipe. you can watch it vibrate. Noise goes away if you rest your foot on it. It is really bad in drive with the air on during a stoplight. Goes away if I slip it in neurtal.
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Re: tail pipe vibration

Postby Mr_Bowtie » August 18th 2009, 6:51am

Have you looked to see if the rubber hangers are still in place for the exhaust?
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Re: tail pipe vibration

Postby 01safari [OP] » August 19th 2009, 1:06am

hangers are still there...

I see you are a CVPI fan! They are one of my favorites to "test drive", especially the unmarked ones.

:layrubber:
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Re: tail pipe vibration

Postby Mr_Bowtie » August 19th 2009, 2:03am

Hmmmmm.....maybe have someone put the Van in gear and check it out while the RPMs are lowest. Should be really obvious you would think...

I was a big CVPI freak before I found my love of the Astro/Safari Vans. :P
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Re: tail pipe vibration

Postby ritous1 » August 23rd 2009, 7:57am

my 99 rwd has the same exact problem. I took it in for inspection last year and they told me it was the catalytic. Still don't know if I believe them since I can literally stop it with one finger on the tailpipe. I just went ahead and bought a whole new exhaust system from the manifold back. Haven't had it installed yet, so I'll have to keep you posted on the results.
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Re: tail pipe vibration

Postby jeff's93astro » August 23rd 2009, 6:28pm

i had same problem something about the stock gm exhaust with rusting out and causeing a vibration. i went back with stainless steel pipe no cat with single in dual out flowmaster super 40 muffler and thats been about 2 years and there is no vibration anymore
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Re: tail pipe vibration

Postby 01safari [OP] » August 24th 2009, 12:29am

I probably won't look at it for a couple of weeks. Since I only drive 1.5 miles each way to work, it's not that big of a deal. Definately before winter.
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