Adding an auxiliary muffler

[NICAT]

I finally replaced the muffler with the junkyard one I had bought previously.
The noise is reduced by about 50%. Since it’s not realistic to expect 100% silence from a 3.2L internal combustion engine, I can say I’m about 90% satisfied with the result!

I previously sound deadened quarter panels and doors. They reduced the high/mid frequency road and wind noise significantly, so makes low frequency exhaust slightly more noticeable

Thanks to everyone for all the support!

 

[CleanSump]

Great! I'm always interested in seeing the results when someone posts a question and you were nice enough to follow up with us!

 

[D60]

Today i went to shop. They told Hangers are fine.
I decided to make an inspection myself.
Guess What. Mercedes designed exhaust hangers covered with metal frame, for failsafe purpose.
So ? Most of the time overstretched hanger that hits bottom of frame gives an illusion of being OK because it is not torn. And dampening potential is significantly reduced.
The rubber at bottom end is freely moving up and down through metal, so provides no dampening effect and usually not torn due to no stress

View attachment 325297

When I was just under something -- I think it was the '16 Buick Encore -- I noticed the rubber hangers are wrapped in what looks like the strapping you use for shipping. Not really sure of the purpose but I guess it prevents excessive pull/sag on the rubber.

 

[NICAT]

Generally

When I was just under something -- I think it was the '16 Buick Encore -- I noticed the rubber hangers are wrapped in what looks like the strapping you use for shipping. Not really sure of the purpose but I guess it prevents excessive pull/sag on the rubber.View attachment 325363

That is failsafe too actually, just different design. (better than metal in terms of comfort, worse in terms of long-term assurance)
if they wanted simply to prevent excessive pull/sag they would make harder/thicker rubber

Great! I'm always interested in seeing the results when someone posts a question and you were nice enough to follow up with us!

Thanks

 

[researcher]

Sure Sir. Since i can post in this forum, take image of my muffler during repair and share here, i definitely have access to daily used modern technologies

But are you sure soundmeter apps will be accurate since phone microphones / and their firmwares are not built / calibrated to accurately measure the level of audio ? In my opinion, readings would differ based on the phone models.
I am planning to buy a dedicated device which is around 200$



Thanks for suggestion, i will further focus on researching f wrapping exhaust would reduce such type of noise on forums. That would be greatest workaround if successfull

most of those sound meter apps are mostly "good enough", they may not be studio quality with a calibrated microphone but they are usually good enough to show you what frequencies are being generated by a noise in the car. It's like a body weight scale, might not be perfect but it definitely can track if you lose or gain weight.

the reason I mentioned a sound app for the cell phone is because it's free and it can show you a lot of information without spending more money.. that's why.. I like free, but you're correct a properly calibrated sound meter is the best.