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      01-29-2020, 04:48 PM   #230
RPM90
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Drives: 340i M-sport AT
Join Date: Mar 2006
Location: Chicago

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Quote:
Originally Posted by Glaede View Post
Morning..

So, I've noticed the wind/grinding noise is also present in idle now! I opened the hood and it sounds like its comming from the area around the turbo!

I have recorded it on a video. Turn your volume up to hear it.

https://photos.app.goo.gl/io5RrdzR235YY76W6
Is it the sound that is like a steady low frequency fan on low speed?
It sounds like wind rushing trough something larger, so it's frequency is low, like if you pursed your lips like you were going to whistle but keep your lips wider/farther apart and blow while making "short u" sound, like in the word for the "Yew" tree.

As you were moving the mic around that sound seemed loudest when the mic was around the area where that rubber boot/coupler is.

If that is the sound, it doesn't sound like a bearing to me.
It sounds like air rushing through a tube.
At least that is the what it sounds like, but it could be generated by something else.

Does anyone have a diagram of the engine bay and related parts?

Last edited by RPM90; 02-07-2020 at 05:53 PM..
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