XK / XKR ( X150 ) 2006 - 2014

Whining Noise

 
  #21  
Old 12-25-2018, 02:54 AM
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It's not air leak ... checked this one already
I suspect a bearing maybe but can't find any
 
  #22  
Old 12-25-2018, 02:56 AM
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Originally Posted by DannyJ View Post
It's not air leak ... checked this one already
I suspect a bearing maybe but can't find any
Sounds very much like air to me, not bearing but I'm no expert!:-)
 
  #23  
Old 12-25-2018, 03:02 AM
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All air intake pipes up to throttle are well connected, vacuum reading is good, idle stable, air intake to cabin hose is disconnected, A/C off, so air system is in good shape
 
  #24  
Old 12-25-2018, 07:21 AM
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If this is from inside the cabin, perhaps take a look at the temperature sensor fan on the instrument panel or look into the seat back fans. I agree that generally it does not sound like a bearing though. It is hard for me to hear in that range but it seems like a harmonic that something is emitting.
 
  #25  
Old 12-25-2018, 10:50 AM
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Originally Posted by pwpacp View Post
If this is from inside the cabin, perhaps take a look at the temperature sensor fan on the instrument panel or look into the seat back fans. I agree that generally it does not sound like a bearing though. It is hard for me to hear in that range but it seems like a harmonic that something is emitting.
I checked the temp sensor. What is the seat back fans ?
 
  #26  
Old 12-25-2018, 11:59 AM
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Gotta get yourself the stethoscope. Shooting in the dark is fun too.
 
  #27  
Old 12-25-2018, 01:27 PM
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On the back side of the seat is a screen that has a fan behind it. Item #21.
I really doubt it could be the source as the sound is more of a whistle than what I would expect to hear as whispy from that component.


 
  #28  
Old 12-25-2018, 02:57 PM
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That fan is not an option in 2008 model, only from VIN 32753
Also, as mentioned, the noise follows precisely the engine revs so seems that it can't be from the cabin after all
 
  #29  
Old 01-03-2019, 01:46 PM
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Sounds very similar to alternator whine in stereo system. I know you said the stereo is off, but is it possible that the amp may still be getting power and feeding noise thru one of the channels? Just a guess...
 
  #30  
Old 01-04-2019, 10:25 AM
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Alternator is a real suspect for sure
thatís why I disconnected the speakers to make sure itís not electrical induced noise
is there any additional speaker under dashboard such as burglar alarm or so ?

however it seems to me that the alternator bearing is whining at some level so maybe mechanical induced noise with all that aluminum monococ structure ?

i plan to make some access to the front pulleys and check them all
what is the easiest way doing so ?

 
  #31  
Old 01-04-2019, 11:55 AM
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This may sound crazy but you should also check your transmission mount. When it's wrecked, the transmission sits in an awkward position and can make all sorts of weird noises in conjunction with the driveshaft.
 
  #32  
Old 01-04-2019, 05:30 PM
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Originally Posted by XJ8JR View Post
This may sound crazy but you should also check your transmission mount. When it's wrecked, the transmission sits in an awkward position and can make all sorts of weird noises in conjunction with the driveshaft.
Transmission and engine mount are brand new...one month old. Thanks anyway, it's not crazy at all...
 
  #33  
Old 01-13-2019, 02:05 PM
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I have seen that back picture of instrument cluster
seems like there is a speaker on the right side so i suspect it may be the source of the whining noise i experience
Anyone knows if that's a speaker?
How difficult is to remove it to check?
 
  #34  
Old 01-13-2019, 02:18 PM
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