Weird noise/vibration after resonator delete (video)
Thread Starter
Member
Joined: Jul 2011
Posts: 188
Likes: 13
-
Weird noise/vibration after resonator delete (video)
I had my resonator removed and replaced with an H-pipe last Monday. The sound is great, but I've started noticing some weird noise/vibration/resonance after that what I can't recall being there before. The sound seems to be very random, but I have managed to find a few ways to reproduce it. It isn't 100% accurate, but if I get the engine hot and drive the car hard, then make some downshifts and come to a complete stop or slow down to almost a standstill. Then after that for a couple of seconds, I get this metallic sounding noise/vibration or drone coming from the back right underside of the car what seems to move along when the RPM's are a bit bouncing when the car "settles down".
Has anyone ever occurred something like this or could help me to identify the cause or root of this sound? I guess It has to do something with the resonator delete because I can't remember ever hearing something like this before.
Video: https://www.dropbox.com/s/nej1ui6ecp...Movie.mov?dl=0 the video isn't the best in audio quality, but if you listen during the following seconds, you'll hear it (3-4 seconds, 8-9 seconds and at 17 seconds mark)
All help is appreciated. I'm going to let the guys check out the exhaust again, but what if they can't figure out the reason of this sound? I also don't want to put my resonator back on, because otherwise the sound is great.
Has anyone ever occurred something like this or could help me to identify the cause or root of this sound? I guess It has to do something with the resonator delete because I can't remember ever hearing something like this before.
Video: https://www.dropbox.com/s/nej1ui6ecp...Movie.mov?dl=0 the video isn't the best in audio quality, but if you listen during the following seconds, you'll hear it (3-4 seconds, 8-9 seconds and at 17 seconds mark)
All help is appreciated. I'm going to let the guys check out the exhaust again, but what if they can't figure out the reason of this sound? I also don't want to put my resonator back on, because otherwise the sound is great.
Last edited by rene_gts; Oct 1, 2018 at 04:14 PM.
MBWorld Fanatic!
Joined: Jun 2008
Posts: 8,078
Likes: 2,867
From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Your exhaust is probably rubbing on the aluminum crossmember when hot. I had to space mine out about 3/8” using some washers.
Or one of your front cats. They sit pretty close to the frame and any misalignment from exhaust work can make them rub. I used a hammer to fix that one.
Or one of your front cats. They sit pretty close to the frame and any misalignment from exhaust work can make them rub. I used a hammer to fix that one.
Thread Starter
Member
Joined: Jul 2011
Posts: 188
Likes: 13
-
Thanks! I'll mention this to the exhaust guy. By the way, my secondary cats are already deleted, but I'll tell the guys to look over the whole exhaust. One thing I did notice immediately is that the exhaust tips are way more out than they were before, so I guess something may be a bit misaligned...
