09-13-2020, 06:25 AM | #1 | ||||
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'M2 CS Whistle': hood air vent design causing resonance ?
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Wondering what happens if you perform a quick test: make a stop at a parking next to the Autobahn, tape off the hood air vent and then drive it close to 200 km/h to check whether the resonance still occurs. If it doesn't, then it's the M2 CS hood air vent design creating 'The M2 CS Whistle'. Remove the tape at the next parking exit. Quote:
Compare with the differently designed hood air vent on the M3 CS, M4 CS and M4 GTS: more tilted backwards, not as horizontally positioned: M4 GTS: M4 CS: In general: Quote:
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09-14-2020, 12:12 AM | #2 |
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Thanks Artemis!!!
I`m flabbergasted, but that is exactly what I meant. Now the question is, can it be resolved? Do I have to make an appointment with the dealer? |
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09-14-2020, 02:00 AM | #4 |
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Same , never heard anything weird at 200km + .
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Bimmed Out1908.50 Jimjamz4565.00 |
09-14-2020, 06:44 AM | #6 |
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It's just a guess, no conclusion. The resonance can have a totally different cause. Have it checked. Is it only a resonance sound or do you also experience vibration in the steering wheel?
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09-15-2020, 04:06 AM | #8 |
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I have driven on the Autobahn at speeds up to 285 kmh and there is no such thing on my press car. I will test more around those speeds, but so far nothing.
In Sport Plus you do here more induction noise coming the engine, but there is definitely not a whistle noise anywhere. MR |
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09-16-2020, 03:30 PM | #9 |
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I have not any song too on track at 180 to 240 ??!!
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12-16-2020, 06:54 AM | #10 |
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We heard this odd sound for the first time today - at around 90km/h - and most likely it was the first time we've been at that speed or above with the windows down. The sound, or whistling, seemed more prevalent from the passenger side. Quite eery.
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12-16-2020, 12:21 PM | #11 |
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The whistling sound on my M2CS did not come from the bonnet.
It was the A pillar/front windscreen connection (seems a common BMW problem) My front windscreen has been replaced, under warranty of course. The whining sound is gone now. |
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12-16-2020, 05:58 PM | #12 |
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Was the windscreen misaligned or any other issues from the factory? Did the dealer say? I picked up a resonance on the highway between 70 and 90mph dropping the car off for PPF. Assumed it was coming from the transport protection film still on the hood and roof. Will know more next week after I pick up.
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12-17-2020, 01:19 PM | #13 | |
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Sorry to hear that your M2 CS left the factory with a quality issue. 2020, COVID-19, lockdowns, etc.:
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