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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 01-27-2013, 01:29 PM
jkess114 jkess114 is offline
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Location: Brooklyn, NY
 
Join Date: Aug 2009
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Mein Auto: Motorcycle
Finally have something to whine about. . .

So, when I start the car (its cold here in NYC at the moment) I get a whine, that sound like its coming from in the dash. Its pretty high pitched and lasts for perhaps 10 seconds.

Also, when the air is on I can hear a low volume, two tone sound, its a motor-like sound in the dash. The sound can be described more accurately in that, the sound drops a whole note for a few second then returns to its predominate pitch: Four second of one tone, then 1 second of the lower tone. Initially I thought it corresponded to RPM, but it happens at any speed, or if I am stopped or driving. If I turn temperature dials all the way down (to 60) it will stop making any noise. I expect it has something to do with the heater core, because of that. If I turn the air off completely the sound goes away.

These are two different issues, that seem unrelated to me.

Anyone have anything similar to the two issues above?


Thanks mucho...

josh
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  #2  
Old 01-27-2013, 02:21 PM
bobbrum bobbrum is offline
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Location: Souderton, PA
 
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Mein Auto: 2003 745Li
Yes, my car has always made this noise when cold. I've had this issue on other cars and it was never a problem.
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Old 01-27-2013, 02:33 PM
jkess114 jkess114 is offline
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Thanks for the reply Bob.

Well this is the first winter I've noticed it and I don't really like it. If there is something I could do about it I would, barring a relatively high pain to benefit ratio. And I certainly would like to know what is causing it. Fans motors needing lube? Faulty valves? Dirty whachamacallits? Funky whosistumpers?

Experience sought. . .!

josh
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Old 01-27-2013, 02:57 PM
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First_745Li First_745Li is offline
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I read in a recent post about a fan blower with whiney sound that was intermitent. Could be same thing?
Worth a shot to do a search for fan blower, bunch of threads came up.
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Old 01-27-2013, 03:06 PM
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Rookie2008 Rookie2008 is offline
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I wanna say the whine sound is coming from your vacuum pump. I do believe it only comes on the 1st start of the day.
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