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01-25-2022, 12:35 PM | #23 | |
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Hi Matowi, Have you found a solution for the issue in discussion? I am also sensitive to car noises - especially taking into account that I am also some sort of audiophile who's listening a lot to music on long car trips and silence on highway speeds was one of the reasons for choosing 7 series over 5 series (besides general confort etc). I have the car (Nov 2020 model - 750D LCI with ~5000miles/8000km on the clock) for just one month and in my case the noise can be heard from the upper frame of the driver's door. I haven't had the occasion to test-hear the right door but my wife (who also has sensitive ears ) didn't identify a similar noise on the passenger's door. The noise on the driver's door is similar to a window opened very-very little; the noise is not at all that disturbing as in your case/description but it's there and clicks on my brain . I will ask at the first inspection for a check of the issue but since it's quite discreet I don't have big expectations for a resolution. One thing I had in mind is to repeat the test I did more than 10 years ago with a much more annoying whistle noise I had on an old Peugeot (it proved to be from the roof antenna in the end) - to seal with adhesive tape the driver's door, get in the car on the right door and make a drive-test. If there is no improvement -> remove the tape, seal only the driver's window and repeat test. I will not test the sealing of the mirror as well since in my case it's quite directional - upper door frame, so it's either the window seal or the door seal. As soon as the weather gets better I'll make the test and post the results. In case you have any conclusion already please post. Thanks, Min. PS: you car is almost a twin sister with mine |
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01-25-2022, 01:49 PM | #24 |
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Hey there!
Let me start with congratulating you on the color choice! Quite stunning As for the noises - I haven't found a solution. However, I love the tape-and-test approach! I will try it as soon as the weather improves a bit. Hopefully, this will allow me to locate one part of my "noise problem" - the wind hum which appears at the base of the A-pillar and which is audible along the entire length of the window frame (rising towards the roofline) I suspect the tape approach won't do much good in terms of fixing the other problem, i.e., the sensation of hearing the passing-by traffic. It's a bit disappointing that my 7-series doesn't handle this issue as well as even my cheap Opel and not-so-cheap Volvo did... I'm pondering a more extreme approach, however the cost quoted by some sound insulation experts had dampened my eagerness to go ahead with it for now... The quotes I got (roughly EUR 2.5-3.0k) cover a thorough cabin insulation; during which they pretty much take the car apart, leaving only the dash intact (everything else is stripped to bare metal - including roof lining, floors, doors, the whole lot - and covered with sound-proofing materials; the same is done to window mounts, door seals, etc.) My brother got his G31 (5 series wagon) done this way. I haven't yet tested it, but he seems happy with the results. I'll wait with my verdict until I've driven his ride after the operation I'm curious to learn what you find during your tests!
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01-26-2022, 05:39 AM | #25 |
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Hi,
Thanks for the quick reply! About the color - congrats for yours too (yours seems also the Donington grey?); not to mention your incredible looking 21" rims (for the moment I remained on 19" for comfort reasons, I'll see in the future if I switch to 20"). Getting back 'on-topic' : as mentioned, I plan to do the tape-test whenever the wheather improves a little. Fortunately for me I am not as affected as in your case: it's only the upper driver's door frame area which generates some low volume but still annoying wind draft noise (it is covered by the music if I increase the volume like 30-40% upwards). So I hope the test will quickly reveal the fix (which, I guess, will consist in replacing the window seal). One more test that I did and which might be helpful in your case: I attached a suction-cap phone holder on the driver's window and pulled it towards the interior of the car while driving. The purpose was to understand if the door is not sealing/pressed enough against the car frame/seals and me pulling it would seal it better; though it didn't seem to improve (perhaps just a little bit) - that's why I still suspect/hope it's from the window seal which is not 'embracing' correctly/completely the whole window... About the windows versus insulation - it is not clear to me if I have the acoustic package; though "S356 Climate Comfort Laminated Glass" and "S358 Climate Comfort Windscreen" are listed for my car - perhaps they are just for climate protection or they include also the thicker glass? I am away now but in the weekend I'll be near the car and I guess I can easily lower the driver's window and see if it's double layered for the acoustic isolation... One last word about the additional car body sound-proofing: I did some on my previous car (Alpina D3 - based on F30 model) during a major sound system upgrade. Basicaly lots of Dynamat sheets were inserted in all doors/panels, on the floor of the car and in the trunk&trunk lid. The effect on highway speeds were visible (especially much lower tyres noise) but wind noise (especially around windshield/sunroof/side windows) was still present (as expected). Ok, the sound-proofing was not done to the level mentioned by you (including roof, seals etc) but my advice is to try and test 2 similar cars/models (like also a G31 without sound-proof and then your brother's car) in order to take a better decision and adjust your expectations from the sound-proofing. If you conclude that the noise comes mainly from the windows/doors seals - I guess the acoustic glass would be the solution for you. Also you mentioned that that specific workshop can help also in improving the door/windows seals? Then definetly I would start with those: on one hand the work is less intrusive then dismantling the whole interior and, obviously, the costs will be much-much lower than the initial quote for the whole car's sound-proofing. I would be confident that acoustic glass plus the door&windows seals extra insulation would do the trick for you. On the other hand the visco-elastic insulators for the whole car (like Dynamat used in my Alpina for doors, floor, trunk) will add some tens of kgs to the weight of the car (in case you are obsessed like me of weight/performance/handling etc); and the facelift 7 comes indeed with lots of 'wool' based insulation (which is a light weight material). And it's not just marketing: in December I dismantled the rear seats and all trunk side-panels in order to install the ski-loading door and I can confirm they used indeed quite some amount of insulation. So for your car my bet would be towards the thicker windows and door/windows seals... And just to add on the debate about acoustic glass role: 2-3 months before buying my car I tested also a similar facelift 7 series but the V8 - 750i (someone wrote that all 750i have by default the acoustic glass?!) and I am tempted to say that the road/wind noise was a little lower in that one than in my 750D?! It might be as well that I was testing it immediately after a long highway trip with my Alpina and on the spot the difference was quite big while now I am comparing my 750D road/wind noise with the similar noise (from my memory) of the 750i tested several months ago... Good luck with your tests and next actions, I'll post my results as soon as I have news. Last edited by min; 01-26-2022 at 12:57 PM.. |
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01-30-2022, 10:15 AM | #27 | |||||
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Back to the wind noise, I'd say that around A-B pillar area it is exactly the same in both cars: it's a non-issue until ca. 70-80 km/h (45-50 mph), gets noticeable but not extremely annoying until ca. 100 km/h (60 mph), and gets on my nerves from ca. 140 km/h upwards (ca. 90mph). Which leads me to the conclusion that my Volvo V90 with acoustic glass was extremely quiet - to such an extent that top-of-the range bimmers with standard glass simply don't keep up Based on your comments, I think I will pay a visit to an independent glass shop or some used parts dealer and enquire about double side window panes. I'm reluctant to change the windscreen though... Probably, I'll keep it in stock form, unless I'm forced to change it after some stone chip or similar damage requires that a new screen is put in place Quote:
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Regarding your other remarks... In a 3-er or even a 5-er I would worry about the extra 30-40kgs that the insulation would add. In my 7-er, which is hardly a curve carver (especially with a heavy diesel upfront...) I won't be concerned at all. Also, I am certain there's lots of sound-deadening stuff on the car in stock form. The back-to-back with my brother clearly confirmed that. Too bad BMW decided to not offer acoustic glass as standard on all 7s. I mean... who would object to a roughly EUR 1k price hike for a base model, if that made the car so much more luxurious? Most buyers wouldn't blink an eye Looking forward to your report
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Had '15 F10 535d; '21 G11 740d Last edited by matowi; 01-30-2022 at 10:20 AM.. |
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02-02-2022, 05:21 AM | #28 | ||
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About windshield - indeed, the proposed price of 2500E is discouraging. You could try either a quotation for an used one or... hurry with the stone chip? (( Though the insurance might cover costs only for a similar windshield and not agree with the 'upgrade' to the double-layered one?... Nevertheless I still think that the whole set of windows (front and side ones) will bring a more noticeable improvement than additional floor/trunk/roof sound-proofing for the 7. For the used parts I guess some homework needs to be done - like checking on realoem.com the part numbers for understanding the differencens and extra parts needed (like just the side windows are different or also the side windows frame seals need to be changed etc). About my car: I did the driver's door window test, sealing it with adhesive tape. I would say that the difference is minimal; as I mentioned from the beginning, in my case that noise is not that disturbing - it's just the obsession that it's not quite normal to be present (even if most people would not perceive it). It's like a draft which can be heard sometimes as if there are some outside gusts of wind from time to time (but low in sound volume/dBs). I guess indeed it depends also on the direction of the side wind; and it doesn't seem to increase with the speed: I could hear it now and then at 120 but also at 160 with the same volume. Indeed at 160-180 the other normal/expected wind noise around the windshield/sunroof area increases a little but still below any other car I tested so far. I'll do soon a test by asking my wife to drive so I can check also the passenger's side window but at some point it seemed that I could hear it slightly also in that right area even when I did sit in the driver's place (a longer trip while I am staying on the passenger's seat will confirm it). If that is the case I guess I'll just live with it since, as said - it's not that disturbing, it's mainly an obsession that something is wrong with the driver's door seal or window seal and that a tiny improvement could be still done... Compared to the previous Alpina it's day and night improvement for the general cabin noise - I guess I hear that little noise exactly due to the fact that the cabin is so silent overall. PS: there is indeed something special about those Volvo's. I was pleasantly surprised by my brother-in-law's XC90 with the acoustic package - incredible silent at high speeds for a SUV (if I am not wrong it won the title as the SUV with the best aerodynamic coefficient).
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'16 Alpina D3 (F30 LCI) - sold '11 BMW 120D cabrio (E88 LCI) & '20 BMW 750D (G11 LCI) Last edited by min; 02-16-2022 at 12:08 PM.. |
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01-28-2024, 02:56 PM | #29 |
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I'm also getting some wind noise on my 740d (2020 LCI model) when driving on the motorway, it sounds as if the driver's window is not fully closed. It feels as if its coming more from the B-pillar side of the door than anywhere else (although this might be a biased observation because my ear is closer to the B-pillar side of the door than anywhere else whilst driving)
It is often combined with the faint sound of a small metallic object rattling, or sometimes it even gives off a whistling noise. Its not something that I would have expected from a car of this calibre. |
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02-17-2024, 04:54 AM | #30 |
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Hi guys, I want to say that I have the same issue with a noisy g11, mine is from 2016,I'm gonna quickly share what I have checked and noticed.
In my situation I noticed the noise coming from the pillar in the middle, between the doors back and front, either way, passenger and driver side, what I notice is that it seems like the door or a window is not closed properly as I can hear the sound much clearer, like when a car passes by, I can hear an increase in noise when it's passing this pillar, so naturally I went and checked the door alignment by myself and at a bmw service, which didn't seem to know what they were doing, but they said it's fine. Looks fine to my untrained eye as well. So then I tried closing all doors by slamming them, of course not crazy hard, just enough so that the soft close will not activate, and I noticed a huge difference. It's much quiter like this, now I really don't know how to proceed moving forward, but this is what I noticed. Try this as well and see if it makes any difference. |
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