Gary gies

Help...Getting frustrated...I had my exhaust worked on and since it was put back together around 4,000 rpm in every gear I get a noise of something vibrating
Have had the exhaust checked three times and does not seem to be rubbing, sounds like it is coming from passenger floor boards. anyone removed the alum panels under car? is there anything under there that could be vibrating? looking for any help anyone can give. I know the psgr side mufflers was hard to wriggle out and there was some pressure put on the alum cover??

Gary gies

Any suggestions

UniTink72

One of the C6Zs I test drove (completely stock) had a rattle at very low speeds in 1st/2nd gear only. I have seen it described on the forums as "marbles in a can" type of sound. I recall it most likely being something in the tunnel or maybe tunnel fastening bolts.
Not sure if yours has anything to do with what I've described but its worth a shot.

FRChilln

My 07 rattled all to hell from inside one of the mufflers before I changed out the exhaust at low speeds.

jwmgr8

Look again for something hitting?
If it only occurs when rev engine at 4000rpm sounds like engine torque which shifts stuff around so it maybe hard to find the touch points?? Thats my guess

Gary gies

I know the sound you are talking about with the marbles my 06 did that this is more of a vibration, I will have to explore a bit more
there is not much clearance for the pipes under there and definitely has to do with the torque I know they where moving the pipes around
taking them out and installing the new ones.

MasterDave

Now that makes no sense at all....

FRChilln

One of the internal welds busted inside the muffler.

Gary gies

I put knew mufflers on but one may be faulty anything can happen

ZIE06Bernie

Make sure it is to do with the exhaust and not the gear lever rattle which runs in time with the engine beat. I expect you are familiar with this vibrating rattle but one never knows.

To check gear lever hold pressure against gear lever when you hear the vibration.

Gary gies

Yes I changed shifters so I don't think it is that
it seems to have appeared since I had the new mufflers put on and it seems to be in the area of the floor pan on passengers side. I will go over the exhaust again I know there is not much clearance where the pipes join up front, I can't stand noises my 06 had noises my 09 was good should have kept it. Thanks for the info

Zoxxo

I don't know if this is your problem but it's a possibility:

http://forums.corvetteforum.com/c6-z...n-exhaust.html

Abel fixed this on my car by injecting adhesive foam in between the floor panels (the same stuff used to glue the flying roof panels down.) Drove me nuts for a long time!

Z//