[Z06] Anyone experienced a vibration resonating sound from exhaust?
03-27-2009, 09:14 AM
#41
Melting Slicks
Thread Starter
03-27-2009, 10:12 AM
#42
Instructor
Member Since: Jan 2009
Location: Ridgeland Mississippi
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exhaust noises
I pulled the fuse on my stock exhaust (2008 Z06) and it made a loud droning noise inside the car at mid RPM in any gear.
I fixed it by putting on the New Corsa Xtreme exhaust. The exhaust rumble sounds dramatically better, there is no drone at all anymore and it added 15-20HP.
I highly recommend the Corsa Xtreme exhaust for the Z06.
I fixed it by putting on the New Corsa Xtreme exhaust. The exhaust rumble sounds dramatically better, there is no drone at all anymore and it added 15-20HP.
I highly recommend the Corsa Xtreme exhaust for the Z06.
04-02-2009, 06:06 PM
#44
Instructor
Your dilemma sounds like mine. It happens at the same rpm etc. But I do notice if I tap the brakes, it will go away. I hold the gas and keep the rpm up and than slightly apply brake and its gone. I am thinking it may be something in my rear passenger side brake vibrating at resonance.
04-02-2009, 06:15 PM
#45
Instructor
I have a similar sound on my 09 Z. It hapens after the car is at oerating temps. It is coming from the right side, very rear. It happensat around 3000 rpm's only & goes away shortly after. Sounds like some thin metal vibrating....It ALMOST resembles a scaled down version of a ricer's exhaust.... It's definately metal to metal contact. I will check it out tonight or tomorrow on jackstands....
Ron
Ron
04-04-2009, 01:22 PM
#47
Drifting
I took my Z in yesterday for this problem. They weren't able to figure out what I was talking about, so I went up there and took the service manager for a ride to show him the problem. He heard the whine and agreed that something was wrong. He said it sounded like a bad bearing in the torque tube. They are going to start working on it on Monday. I'll post more when they hopefully fully diagnose the problem and fix it.
04-04-2009, 03:24 PM
#48
Le Mans Master
04-14-2009, 08:41 PM
#49
Drifting
Well, my problem turned out to be something wrong/loose in the passenger side muffler. Got a new muffler now, and the noise is gone. Glad it wasn't something in the transmission or torque tube. 
02-14-2010, 10:09 AM
#50
Team Owner
I have a 2008 Z with 15k miles and it is doing this now. Noticed it last night. A high freq vibration at the same RPM in the first three gears. Just something else the dealership won't find, but it won't stop them from getting my car nasty as hell and fingerprinted up.
02-14-2010, 10:38 AM
#51
Drifting
My 09Z does the same thing. Starts only after warm up at around 25-2700 rpms. Seems to be coming from passenger side seat area. Car sat on lot for over a year. Dealership checked it out and found nothing. Sure wish someone would find the fix!
09-19-2010, 04:24 PM
#54
Melting Slicks
Having the same issue with my '09 Z06, I think. Strange vibration between 2K-3K RPMS. I took it into a dealership and they said it had to do with the muffler hangers. They switched the springs (swapped left-for-right and right-for-left) and the problem went away for a little while, but now it's back...
The tech said there's nothing wrong with the tranny, which was good news...
The tech said there's nothing wrong with the tranny, which was good news...
09-19-2010, 04:47 PM
#55
Drifting
I actually had my car at teh dealership on Friday to fix this issue, I thought I was the only one. They said the spring was letting the muffler hit somethign when it was warm. They put in a new spring and said the same thing happened. He said they put some kind of heat shielding or sometihg where it was hitting, and to let them know if it wasnt fixed. Well it turns out that it is a little better but still not fixes so ti will go back when I have time. Already left him a VM that is was still a problem. But sounds liek the springs are too long.
09-19-2010, 08:08 PM
#56
Hey Morris - mine does this too and if you hadn't resurrected this thread I would have never even known others had the problem. I know that with my car the mufflers do hit the Pfadt sway bars so I put a little bit of heat tape on them to see if that helps.
I'm with the theory that it's the flaps in the muffler rattling and the car didn't do this when new. If I can find a deal on the ZR1 or 2011 Z06 mufflers I'll put those in and see if it's still there.
I'm with the theory that it's the flaps in the muffler rattling and the car didn't do this when new. If I can find a deal on the ZR1 or 2011 Z06 mufflers I'll put those in and see if it's still there.
09-19-2010, 08:27 PM
#57
Drifting
I know exactly what this sound is. Had it in my old set. It is the baffle inside the can coming loose. I have a set in the garage now ... you can drop it out in the lawn and hear the clatter inside the can.
Bad news ..... i have it coming back in one of my new cans.
Bad news ..... i have it coming back in one of my new cans.
09-19-2010, 09:32 PM
#58
Drifting
There my in fact be different issues for differnet people
09-19-2010, 09:41 PM
#59
Safety Car
I know that noise. Had it betweeh 2,500 and 3,200 rpm. Sounded like it was coming from the muffler/subframe area. Mine was like a "whoosh" noise. I'm convinced it was coming from a muffler(s).
Took it to the dealer as it's under warranty and of course, dealer said they couldn't find it and nothing they could do.... Had it back to them twice. I told them it was coming from a muffler and they said "prove it". Oh how I detest those people.
I proceeded to cut into the mufflers to do muffler mod. I had been planning to do this for some time. While in there I reinforced the baffles by welding in place with a solid bead along their length. These baffles are only spot welded in place. I believe the noise is a resonance from the baffles oscillating.
Welded the cans back together and reinstalled.
Noise gone.
Rick
Took it to the dealer as it's under warranty and of course, dealer said they couldn't find it and nothing they could do.... Had it back to them twice. I told them it was coming from a muffler and they said "prove it". Oh how I detest those people.
I proceeded to cut into the mufflers to do muffler mod. I had been planning to do this for some time. While in there I reinforced the baffles by welding in place with a solid bead along their length. These baffles are only spot welded in place. I believe the noise is a resonance from the baffles oscillating.
Welded the cans back together and reinstalled.
Noise gone.
Rick
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Z.06 (10-25-2023)
09-19-2010, 11:08 PM
#60
Burning Brakes
Exhaust Rattle on Z06
Lately I have noticed if I run the car hard a couple times and get everything warmed up I hear an annoying vibration and almost like resonating sound coming from the back at low speed take offs and certain rpms. It definately has something to do with expansion. Once the exhaust/ mufflers get hot and expand some something is either hitting or resonating between two metals. I have Kooks 1 7/8 headers, 3 x 3 catted x pipe and stock mufflers modded. Sounds to me like its in the far rear. Im gonna jack it up over the next couple days and check out what I see under there and see if there are any signs of rubbing. But when i originally installed it I double triple checked everything to make sure there where no issues. My gut is telling me it has to do with one of two things. Either the clamp on the midpipe that I turned to the side to keep it high before tightening is hitting the side of the tunnel or its something inside the mufflers. 
I need to get the conditions where it occurs down pat, so I can reproduce it at the shop that modded my mufflers. The owner says if I can demonstrate it to him, he will fix it, and I believe him.
