[01safari]

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?

 

['cudapaul]

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.

 

[Big_kid]

'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).

 

[01safari]

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.

 

[Mr_Bowtie]

Have you looked to see if the rubber hangers are still in place for the exhaust?

 

[01safari]

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:

 

[Mr_Bowtie]

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.

 

[ritous1]

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.

 

[jeff's93astro]

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

 

[01safari]

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.