Wind Buffeting and Cabin Pressure Vents Rattle.

[frcnducted]

With my windows down while driving, starting at around 35mph my cabin pressure vent flaps go crazy. Has anyone else's done this? I have had mine at the dealer already but was not fixed. The slapping/rattle generated drives me nuts. It is not a subtle sound!!! I have already broken my body panels down for access. Removed the flaps themselves to prove they are the root cause.

If someone already has engineered a fix please share here. I already have 2 possible solutions from what I have reviewed so far. My materials won't arrive till this weekend. If 1 of my 2 ideas work or if both are required for a resolution I will share here next week.

BTW I still love my Gren. So far this has been the only issue I have had. Fingers crossed

 

[trobex]

No not at all... don't they have a tensioner in them?

 

[frcnducted]

@trobex thanks for confirming with yours. There are no tensioners. Pretty standard design. I am making my own flaps right now. Silicon sheets came in a day early. Stock are 1mm thick. The sheet I have is 1.3mm and roughy 33% heavier. I have 9 more to make wish me luck lol. Pic provided is with the flaps removed.

 

[Lars]

First time I heard that noise I immediately pulled off the road, got in the cargo area and had my wife drive me around to figure out where the noise was coming from. I determined that it happened when the passenger window(s) where the only ones open and at a certain speed. I assumed either mine is the only one that does that or people never open the passenger windows with the front windows closed.
If there is a simple fix I'd be more than grateful to you.

 

[frcnducted]

First time I heard that noise I immediately pulled off the road, got in the cargo area and had my wife drive me around to figure out where the noise was coming from. I determined that it happened when the passenger window(s) where the only ones open and at a certain speed. I assumed either mine is the only one that does that or people never open the passenger windows with the front windows closed.
If there is a simple fix I'd be more than grateful to you.

Hey Lars. Thanks for confirming I am not crazy. Just came back from a test drive. My custom silicon flaps helped but it is not a full solution. Plus they did not sit on the frame as nice as the factory ones. I may just remake the imperfect ones.

From my last few test drives I have determined that the solution is not going to be simple, sorry. I am 100% positive now that the vents and flaps are simply overwhelmed by the pressure. So the only way to fix it is to restrict the pressure it sees. I brought some masking tape and some foam to partially cover the interior panel vents as an experiment and that has been the biggest improvement so far, but it still does it. See attached pic as examples. Trouble is there are many vents.

I am heading out now to get some 1/2 inch breathable foam of different densities. Amazon is delivering some charcoal based filter sheets. I am basically going to turn the interior portion of the cabin pressure vent assembly into air filtration sort of deal, kinda dual function. I just need to compile the exact amount of restriction and the bad part pull the interior paneling off.

At the moment I do understand that adding the restriction will make the doors harder to close and cause more human ear drum pain. But myself personally I would rather have to crack a window before closing the last door or have to open more than 1 window at a time as a nuance then have have my car sound like it's rattling to pieces. I also have the safari glass option to pop up.

When I get the right combo together I will update.

 

[Tom109]

Maybe go back to your dealer and open a case with Ineos? This is the first thread on this issue, and I personally have tested for buffeting with every opened/closed window configuration I could use. I have none.

 

[anand]

The only way I experience any sort of buffeting is with the front windows up and only the rear's down, which is definitely not a way that I ever drive...

Interesting that you have such a different issue... Perhaps follow Tom's suggestion above