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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Whirring noise

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      04-14-2017, 12:57 AM   #1
garrito_burrito_
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Whirring noise

I have about 400 miles on the car and notice a steady whirring sound continuously as I drive along. Its pretty faint, but wondering if its just the DCT or could be something else. It sounds like the noise a computer's fan makes. Gets slightly higher pitch the faster I drive. Does this sound at all out of the norm? Im guessing its the DCT.
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      04-14-2017, 04:17 AM   #2
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Quote:
Originally Posted by garrito_burrito_ View Post
I have about 400 miles on the car and notice a steady whirring sound continuously as I drive along. Its pretty faint, but wondering if its just the DCT or could be something else. It sounds like the noise a computer's fan makes. Gets slightly higher pitch the faster I drive. Does this sound at all out of the norm? Im guessing its the DCT.
Turbo noise?
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      04-14-2017, 07:46 AM   #3
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Quote:
Originally Posted by heart_doctor View Post
Quote:
Originally Posted by garrito_burrito_ View Post
I have about 400 miles on the car and notice a steady whirring sound continuously as I drive along. Its pretty faint, but wondering if its just the DCT or could be something else. It sounds like the noise a computer's fan makes. Gets slightly higher pitch the faster I drive. Does this sound at all out of the norm? Im guessing its the DCT.
Turbo noise?
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      04-14-2017, 12:24 PM   #4
garrito_burrito_
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I also figured it could be that. Seems more metallic though. Either way, it doesn't sound like anything is wrong. Thanks guys
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      04-14-2017, 12:40 PM   #5
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Quote:
Originally Posted by garrito_burrito_ View Post
I have about 400 miles on the car and notice a steady whirring sound continuously as I drive along. Its pretty faint, but wondering if its just the DCT or could be something else. It sounds like the noise a computer's fan makes. Gets slightly higher pitch the faster I drive. Does this sound at all out of the norm? Im guessing its the DCT.
Probably driveshaft spinning under you.
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      04-14-2017, 07:49 PM   #6
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I noticed this sound dramatically after installing an open style intake
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      04-15-2017, 12:19 PM   #7
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Quote:
Originally Posted by garrito_burrito_ View Post
I have about 400 miles on the car and notice a steady whirring sound continuously as I drive along. Its pretty faint, but wondering if its just the DCT or could be something else. It sounds like the noise a computer's fan makes. Gets slightly higher pitch the faster I drive. Does this sound at all out of the norm? Im guessing its the DCT.
Any mods? With the window down and driving along any curb or barrier the slotted and drilled rotors will buffet. Sounds crazy but my m performance BBK is hella loud when I get on the brakes. Perhaps this is what you are hearing.
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      04-17-2017, 10:57 AM   #8
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Most important question to ask is if you have any mods. If you do then maybe you can draw some conclusions from those parts to narrow down exactly what you are hearing.
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      04-20-2017, 12:45 AM   #9
garrito_burrito_
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No mods, completely stock. Just about 700 miles on it now. The more I drive, and notice it here and there, the more it sounds normal.
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      04-24-2017, 10:47 AM   #10
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I have a metal-on-metal noise, coming from the rear axle, which I hear between 45 and 80. Below 45 its too faint to hear, above 80, all the tyre scrub and wind noise are too loud to hear it.

Its not a throbbing or vibration noise. Its not a wheel bearing noise, which I would classify vibration-like.
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      05-03-2017, 03:24 PM   #11
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Quote:
Originally Posted by Smee.x.Again View Post
I have a metal-on-metal noise, coming from the rear axle, which I hear between 45 and 80. Below 45 its too faint to hear, above 80, all the tyre scrub and wind noise are too loud to hear it.

Its not a throbbing or vibration noise. Its not a wheel bearing noise, which I would classify vibration-like.
Yeah it sounds like a similar if not the same noise I have. Actually starting to like it. At this point Im fairly confident its normal and just part of the drivetrain. Its odd, but exciting, because thats what you get when you drive a race car right?!
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      09-06-2017, 08:26 AM   #12
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Quote:
Originally Posted by Smee.x.Again View Post
I have a metal-on-metal noise, coming from the rear axle, which I hear between 45 and 80. Below 45 its too faint to hear, above 80, all the tyre scrub and wind noise are too loud to hear it.

Its not a throbbing or vibration noise. Its not a wheel bearing noise, which I would classify vibration-like.
My noise increased in range slightly 40-85, took the BMW technician for a drive in it yesterday, he reckoned it wasnt right. BMW looking at it next week.
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