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      11-17-2012, 04:16 PM   #13
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Drives: 335i
Join Date: Jun 2007
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Originally Posted by 1LUMI View Post
Tried with headlights on, off, every position, doesn't change or add to the noise.

Would this fan be rev dependent? the sound comes and goes, and is only at idle.. And in N, I rev it and the noise goes along with the revs.

It happens at idle only, or below 1000 rpm.. Never during cruising..

I put the car in N, at idle it does it, and when I rev slightly it does it. I 100% can hear for sure it goes away when I pass 1K rpm..

I tried, AC on, off, raido on off, cd out, headlights on off, every position.. Nothing effects the sound.

Only when I rev lightly, the sound goes along with the revs.
And the sound comes and goes. when it wants. So im guessing something engine wise.
Yes as you rev it the electric fan on mine seems to speed up and decrease as you are idling.