2019 trunk wind rattle, rear cabin air vents [updated, fix pending] - Page 2

ScatPack · 07-11-2019, 10:32 AM

painters tape them shut, or snap them off.

Emoto · 07-11-2019, 10:40 AM

Quote:

Originally Posted by protovack

thats them!! Thanks! I was able to feel it with my hand by reaching up under the rear quarter panel. You can also feel it by reaching down behind the battery on the inside.

I'm going to update my original post to reflect the current status of this issue.

Thanks again, to scargoes for the theory, and mark 114 for the pic. You guys are awesome! This will definitely lead to a fix.

Now, the fix...will take a little bit of creativity. If anybody has ideas...post 'em up!

We must somehow immobilize those flaps so they can't flutter in the turbulent air. Or modify them somehow so they don't catch the turbulent air and flap back and forth.

So, it would seem the problem is that they are so light that they flap around. What about making them weigh more without modifying or damaging anything. If you can reach down in there, you could clip a small binder clip onto each flap and see what that does. I know those things hold on well, and nobody can see them there.

A small one of these:

thrashergrant · 07-11-2019, 10:52 AM

Quote:

Originally Posted by protovack

I got a video. You might have to turn your speakers up, but when it happens, its clearly audible. I was telling my wife to turn the air on and off, and you can see that it goes away with the fans on, and then comes back again when the air is turned off.

https://youtu.be/uCJFxg31_dY

I believe this sound is coming from the rear cabin vents. Does anybody know where these are located and how I would access them?

Mine sounds EXACTLY like this. Looking forward to your next diagnosis.

Airfuel · 07-11-2019, 11:13 AM

I always have the fans on no matter what. Why would you turn them off? fresh air in the cabin is a good thing.

Fixa · 07-11-2019, 01:17 PM

18 SS 1LE with very similar sound coming from the rear trunk area. Some time ago I removed the rubber flaps on those vents assuming that was the source. Unfortunately for me the sound is still there. Hope your fix works for you.

protovack · 07-11-2019, 01:19 PM

Well thats the question, why not just leave the air on low all the time. If I want to cruise on the highway at 60mph with my windows slightly down, I can hear it and its super annoying.
I really enjoy cruising on the highway with my windows cracked and fresh air blowing in. I want to be able to do that without the annoying flapping sound. Sure I could just roll up my windows and turn the air on, but thats no fun on a nice sunny day.

protovack · 07-11-2019, 04:59 PM

Quote:

Originally Posted by Fixa

18 SS 1LE with very similar sound coming from the rear trunk area. Some time ago I removed the rubber flaps on those vents assuming that was the source. Unfortunately for me the sound is still there. Hope your fix works for you.

does your noise go away when you turn the HVAC fan on?

Gunkk · 07-11-2019, 05:35 PM

That's a helluva good piece of investigative work there, Protovack!

Well done!

Fixa · 07-11-2019, 06:56 PM

Quote:

Originally Posted by protovack

does your noise go away when you turn the HVAC fan on?

No, my noise remains even with the HVAC so with any luck your remedy should work.

tylerma · 07-15-2019, 10:44 AM

My car has the same issue. The only difference I noticed is that the sound goes away with the HVAC off and or blowing fresh air. I only hear the fluttering sound when the AC setting is on. Fan speed does not seem to have a large impact on the problem for me.

compactedbear · 08-06-2019, 09:32 AM

Experiencing the exact same noise. I couldn't for the life of me figure out what/where it was coming from! Based on the type of noise, this has to be it!

Have you been able to try any fixes yet?

protovack · 08-11-2019, 09:08 PM

I'm on hold due to a new baby coming, so no fix yet.
My workaround at least in summer, is to have my window down far enough that the wind noise drowns out the rattle

If your windows are up, then you just leave the HVAC fan on a low setting.

The fix is needed for those times when you want to crack your window and leave the HVAC system off.

flaudia402 · 11-16-2019, 02:34 PM

Any update?

protovack · 11-21-2019, 09:09 PM

Not a good one yet.
Just removing (ie cutting off) the flaps does fix it, but then you have an opening that moisture and dirty air can get in. It's not a huge deal because there isn't anything mechanical back there, but still, not a great fix.

07-11-2019, 11:13 AM	#18
Airfuel Drives: '19 2SS M6. Join Date: Aug 2018 Location: CT Posts: 340	I always have the fans on no matter what. Why would you turn them off? fresh air in the cabin is a good thing. __________________ 2019 2SS, Shadow gray, 6mt, NPP, Magneride, Bose.

07-11-2019, 01:19 PM	#20
protovack Drives: 2019 2LT 2.0T M6 Riverside Blue Join Date: Jan 2018 Location: WA Posts: 847	Well thats the question, why not just leave the air on low all the time. If I want to cruise on the highway at 60mph with my windows slightly down, I can hear it and its super annoying. I really enjoy cruising on the highway with my windows cracked and fresh air blowing in. I want to be able to do that without the annoying flapping sound. Sure I could just roll up my windows and turn the air on, but thats no fun on a nice sunny day. Last edited by protovack; 07-11-2019 at 04:52 PM.

07-11-2019, 10:32 AM	#15
ScatPack Banned Drives: None at the moment Join Date: May 2018 Location: Florida Posts: 284	painters tape them shut, or snap them off.

07-11-2019, 01:17 PM	#19
Fixa Drives: 2018 1LE Join Date: May 2018 Location: Boston MA Posts: 36	18 SS 1LE with very similar sound coming from the rear trunk area. Some time ago I removed the rubber flaps on those vents assuming that was the source. Unfortunately for me the sound is still there. Hope your fix works for you.

07-11-2019, 05:35 PM	#22
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 5,156 View My Garage	That's a helluva good piece of investigative work there, Protovack! Well done!

07-15-2019, 10:44 AM	#24
tylerma Drives: 98 Maxima Join Date: Apr 2018 Location: New Mexico Posts: 16	My car has the same issue. The only difference I noticed is that the sound goes away with the HVAC off and or blowing fresh air. I only hear the fluttering sound when the AC setting is on. Fan speed does not seem to have a large impact on the problem for me.

08-06-2019, 09:32 AM	#25
compactedbear Drives: 2018 1LT RS - Nightfall Gray Join Date: Dec 2018 Location: Dallas Posts: 4	Experiencing the exact same noise. I couldn't for the life of me figure out what/where it was coming from! Based on the type of noise, this has to be it! Have you been able to try any fixes yet?

08-11-2019, 09:08 PM	#26
protovack Drives: 2019 2LT 2.0T M6 Riverside Blue Join Date: Jan 2018 Location: WA Posts: 847	I'm on hold due to a new baby coming, so no fix yet. My workaround at least in summer, is to have my window down far enough that the wind noise drowns out the rattle If your windows are up, then you just leave the HVAC fan on a low setting. The fix is needed for those times when you want to crack your window and leave the HVAC system off.

11-16-2019, 02:34 PM	#27
flaudia402 Drives: 2018 SS 1LE Join Date: Aug 2018 Location: LA Posts: 54	Any update?

11-21-2019, 09:09 PM	#28
protovack Drives: 2019 2LT 2.0T M6 Riverside Blue Join Date: Jan 2018 Location: WA Posts: 847	Not a good one yet. Just removing (ie cutting off) the flaps does fix it, but then you have an opening that moisture and dirty air can get in. It's not a huge deal because there isn't anything mechanical back there, but still, not a great fix.

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