Flex joint in downpipes create noise?
May 20, 2012, 06:41 PM
#1
Flex joint in downpipes create noise?
Certain downpipe designs have a flex joint. Has anyone experianced a squeeking noise that sounds like a squeeking hampster wheel after installing a tbe with a ets or ams downpipe? I thought thst at fist it was the flywheel. I dont think its the case bc I can eliminate the sound butter smoth clutch engagments under light load takeoffs from a stop. The noise appears when I don't have the smoothest engagment of first which creates some back and forwards jostling of the car. Also a less audible same sounding sound can be heard when second isnt engaged baby smooth. Side to side rocking due to poor streets doesnt really create it. More so a back and forwards motion it takes. I think the whole system might move forwards and back tiny amounts due to the flex design and cause a squeek. Possible? Perhaps harder hangers to substitute to fix?
May 23, 2012, 09:02 AM
#4
I have a little squeak that I can't find and have a ETS dump pipe, but I assumed it was a loose stereo or something.
On I88 in Chicago there are some very bumpy parts of the highway where you hit a nodal up and down (probably similar to your forward / back) on the highway. It is constant throttle, but sometimes hard to reproduce. My girlfriend thought it was coming from my seat on a trip we just took, but it would make sense if it was in the driveshaft / exhaust tunnel.
I'd be more likely to think it was the dump pipe rubbing a heat shield though....
On I88 in Chicago there are some very bumpy parts of the highway where you hit a nodal up and down (probably similar to your forward / back) on the highway. It is constant throttle, but sometimes hard to reproduce. My girlfriend thought it was coming from my seat on a trip we just took, but it would make sense if it was in the driveshaft / exhaust tunnel.
I'd be more likely to think it was the dump pipe rubbing a heat shield though....
May 25, 2012, 07:22 AM
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It's possible that the hangers are to blame. The stock hangers are pretty soft and will allow the exhaust system to move. Having a flex section on the DP will allow even more movement. You could try upgrading your hangers to something stiffer like the Torque Solutions hangers.
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May 31, 2012, 09:38 AM
#8
You can expect the squeek to get a bit louder as the system breaks in and the heat has it's effect on the metal. The squeek only comes about under specific backwards and forwads directional rocking.
Thanks, I will be doing exactly this, upgrading the hangers. Are the torque solutions the best?
It's possible that the hangers are to blame. The stock hangers are pretty soft and will allow the exhaust system to move. Having a flex section on the DP will allow even more movement. You could try upgrading your hangers to something stiffer like the Torque Solutions hangers.
May 31, 2012, 12:38 PM
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You can expect the squeek to get a bit louder as the system breaks in and the heat has it's effect on the metal. The squeek only comes about under specific backwards and forwads directional rocking.
Thanks, I will be doing exactly this, upgrading the hangers. Are the torque solutions the best?
Thanks, I will be doing exactly this, upgrading the hangers. Are the torque solutions the best?
Jun 11, 2012, 05:39 PM
#11
I went ahead and installed the torque solutions exhaust kit. Installed pretty easily with the use of crowbar, wide pliers and wd-40. The noise seems to be gone. The oem rubber was stretchy, very maluable when they were being taken off. So you can imagine the allowance for a exhaust to move around. Now keep in mind that those oem peices are being used for the stock exhaust that has a x oem diameter and is engineered to not rub and so forth. Change the piping diamater, weight and shape and expect noises. The torque solutions kit solves the movement. So the squeek is gone but the new firm, dense polyurithane will transpose vibrations more. For me its all good. I take the trade. 
Jun 11, 2012, 06:15 PM
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I went ahead and installed the torque solutions exhaust kit. Installed pretty easily with the use of crowbar, wide pliers and wd-40. The noise seems to be gone. The oem rubber was stretchy, very maluable when they were being taken off. So you can imagine the allowance for a exhaust to move around. Now keep in mind that those oem peices are being used for the stock exhaust that has a x oem diameter and is engineered to not rub and so forth. Change the piping diamater, weight and shape and expect noises. The torque solutions kit solves the movement. So the squeek is gone but the new firm, dense polyurithane will transpose vibrations more. For me its all good. I take the trade.
Aug 11, 2012, 12:15 PM
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had the same issue. found that the hangar was just rubbing against something stupid like a bolt.
3 small knocks from a hammer on the hangars elbow to move it away from the rubbing and problem fixed. never happened again in 4 years.
3 small knocks from a hammer on the hangars elbow to move it away from the rubbing and problem fixed. never happened again in 4 years.
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