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-   -   Noisy Aactuators on Exhaust Flaps (http://www.camaro5.com/forums/showthread.php?t=245351)

Neil's BlackZL1 08-21-2012 04:21 PM

Noisy Aactuators on Exhaust Flaps
 
Anyone else notice noises coming from the actuators on the exhaust?

I have had it in 4 times for the same thing and they replaced the exhaust from the cads all the way back, and it still makes the same noise.

You can hear a mechanical sound when you lightly give it gas and let off. Kind of a buzzing sound like the flaps are opening and closing.

BAD ZL1 08-21-2012 05:14 PM

Quote:

Originally Posted by Neil's BlackZL1 (Post 5473753)
Anyone else notice noises coming from the actuators on the exhaust?

I have had it in 4 times for the same thing and they replaced the exhaust from the cads all the way back, and it still makes the same noise.

You can hear a mechanical sound when you lightly give it gas and let off. Kind of a buzzing sound like the flaps are opening and closing.

Yes, I hear like a very short duration rattle when I speed up past 1100 RMP or so. i assume its the valves closing. Not a big deal to me.

Neil's BlackZL1 08-21-2012 05:19 PM

It happens at slow speed or at idol when you slighty rev the motor

Al C. 08-21-2012 05:53 PM

Quote:

Originally Posted by Neil's BlackZL1 (Post 5473753)
Anyone else notice noises coming from the actuators on the exhaust?

I have had it in 4 times for the same thing and they replaced the exhaust from the cads all the way back, and it still makes the same noise.

You can hear a mechanical sound when you lightly give it gas and let off. Kind of a buzzing sound like the flaps are opening and closing.


I have an open RO with GM for the same problem.. Not enough vacuum to close them at low RMP's. GM engineer as tried to fix but they havent been able to. They have tried bigger vacuum boxes, it helps but doesnt close them completely. Car has been in the shop for 3 weeks now. Do you have an automatic? GM said it only happens with auto's. Last I heard they were going to order a new complete exhaust system from a 6speed manual to see if that would fix it, from the manifold to exhaust tips. :iono:

gblaue 08-21-2012 07:21 PM

Quote:

Originally Posted by Al C. (Post 5474209)
I have an open RO with GM for the same problem.. Not enough vacuum to close them at low RMP's. GM engineer as tried to fix but they havent been able to. They have tried bigger vacuum boxes, it helps but doesnt close them completely. Car has been in the shop for 3 weeks now. Do you have an automatic? GM said it only happens with auto's. Last I heard they were going to order a new complete exhaust system from a 6speed manual to see if that would fix it, from the manifold to exhaust tips. :iono:

Mines a 6 speed manual and does it too.

Al C. 08-21-2012 07:50 PM

Quote:

Originally Posted by gblaue (Post 5474568)
Mines a 6 speed manual and does it too.

Well then idk.. Maybe others don't notice it, don't care, or doesn't happen at all...I found it very annoying, especially coming from a $60k car.. My car was delivered in late April, I've only put 1k miles on it cause the noise bothered me so much. Other than a drive to the dealership, it stays parked the the garage until it gets fixed.. So sad...

Zee-Ell-One 08-21-2012 07:59 PM

Quote:

Originally Posted by Al C. (Post 5474692)
Well then idk.. Maybe others don't notice it, don't care, or doesn't happen at all...I found it very annoying, especially coming from a $60k car.. My car was delivered in late April, I've only put 1k miles on it cause the noise bothered me so much. Other than a drive to the dealership, it stays parked the the garage until it gets fixed.. So sad...

Pull the fuse...Its behind the trunk wall carpet on the right inside the trunk. Theres one black button retainer to pull so you can peel back and expose the fuse box...You will be glad you did especially during breakin. Its really not that much louder between 1000 and 3000rpm's when cruising....sounds way way better.. Before I pulled it I found myself trying to rev past 3000 but not past 4000 just to hear it roar... now I don't have to. I'm convinced it has better pick up now too at the normally closeed RPM range..Win win.. My car is having other issues with leaking coolant and a metal on metal noise eminating from the rear end on decelleration that I will post about later...

jbotta 08-21-2012 08:01 PM

http://www.youtube.com/watch?v=i6UQFnXHL94

listen close, you can here the flaps open and close, hope thats ok, cant here any buzzing, neil can you here it from video, let us know what happens

ZoomZoom 08-21-2012 09:28 PM

Do you hear it inside the car? I've had the flapping noise since day one at about 35 to 40 mph. Have a auto, Thought it was one of the many stickers under the car, but pulled them off and it still there. :iono:

RoketRdr 08-21-2012 11:21 PM

What you're hearing is the flappers vibrating in the exhaust tips. The Vette's do it as well. A light spring can cure this issue.

SlingShot 08-21-2012 11:59 PM

I've never noticed any sound, and to not drive your car because of a noise ?

ZL1 TIBS 08-22-2012 08:09 AM

My first mod was pulling the vacuum line and plugging it. I don't hear any weird noises now. Just a killer exhaust note.

Neil's BlackZL1 08-23-2012 11:50 AM

Quote:

Originally Posted by Al C. (Post 5474209)
I have an open RO with GM for the same problem.. Not enough vacuum to close them at low RMP's. GM engineer as tried to fix but they havent been able to. They have tried bigger vacuum boxes, it helps but doesnt close them completely. Car has been in the shop for 3 weeks now. Do you have an automatic? GM said it only happens with auto's. Last I heard they were going to order a new complete exhaust system from a 6speed manual to see if that would fix it, from the manifold to exhaust tips. :iono:


It is an Auto...I was told I will hear something today. I will post what they say

Neil's BlackZL1 08-23-2012 11:51 AM

Quote:

Originally Posted by jbotta (Post 5474733)
http://www.youtube.com/watch?v=i6UQFnXHL94

listen close, you can here the flaps open and close, hope thats ok, cant here any buzzing, neil can you here it from video, let us know what happens


I don't hear it in the video, all i hear is the sweet sound of power!!!


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