Whining noise. FROM WHAT?!?!
05-14-2009, 11:18 PM
#11
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Hard to say, depends on how tight a turn I guess. I'm not sure if the noise is RPM dependent or not from your description. You say it gets louder with speed? But the same pitch?
I would also try coasting in neutral and seeing if you can change the noise by revvign the engine, hitting the brakes lightly, etc.
-Joel.
I would also try coasting in neutral and seeing if you can change the noise by revvign the engine, hitting the brakes lightly, etc.
-Joel.
05-14-2009, 11:19 PM
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Well....
Hard to say, depends on how tight a turn I guess. I'm not sure if the noise is RPM dependent or not from your description. You say it gets louder with speed? But the same pitch?
I would also try coasting in neutral and seeing if you can change the noise by revvign the engine, hitting the brakes lightly, etc.
-Joel.
I would also try coasting in neutral and seeing if you can change the noise by revvign the engine, hitting the brakes lightly, etc.
-Joel.
05-14-2009, 11:29 PM
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EXACTLY THE SAME!!
Let me know if you find it. I have an identical single pitch whine on my 98 S8 that I have been unable to track down. It has not changed in a year, although day to day it can be louder or almost inaudible. Only on motion, doesn't change with revs, steering position, gearbox in neutral or drive, braking, a/c, fan or indeed anything. Sounds like tyre noise, but purer tone and seems higher up (although difficult to tell). Over new, sound absorbing tarmac it is noticeably reduced, so it is being generated outside the passenger compartment. It definitely takes a few minutes of driving before it appears. I thought (from partially tarmaced road repairs) that it was from one side of the vehicle, but have not really proven that. As it has not changed over a year, I have grown used to it and just ignore it, (also if I sit back a bit it reduces, so the resonance transmission is slightly odd) but it would be nice to know what it was. My best guess is a drive shaft bearing, but I would have expected a change in pitch with speed. I hope you have more success than me in tracking it down. The good news is that from my experience it appears completely harmless.
-Only in motion.
-Appears after a couple of minutes of driving.
-Doesnīt change with revvs, stearing etc etc.
-Sounds like tyre noise. Loud tyrenoise!!!
The only difference is that it appears every time I drive the car.
My first guess was also drive shaft bearing. Though the car has only done 100.000 miles. Ainīt that strange?
05-14-2009, 11:30 PM
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Will check.
Iīll check that. But wouldnīt the pitch of the sound change dependent of speed if it were the brakes?
05-14-2009, 11:41 PM
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05-15-2009, 04:33 AM
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Just for kicks, tell me if the noise goes away with the HVAC turned off.
The electric fan makes a loud squealing sound when they go bad. It sounds exactly like a belt/pulley squealing, easy to miss.
Bob
The electric fan makes a loud squealing sound when they go bad. It sounds exactly like a belt/pulley squealing, easy to miss.
Bob
05-16-2009, 02:15 PM
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I can't speak for The Ringleader (with a name like that, who could?) but in my case turning the a/c off, or indeed the whole HVAC unit off, makes no difference. Again in my case, the sound is a resonance like a tuning fork, and I could almost believe it could be airflow over something, but there is a delay before it starts, so it must be mechanical and affected by something warming up or getting oil pressure. It could be a resonance of a drive shaft being set off by tyre vibration or a slightly loose bearing, but without a better idea of where to look I have been reluctant to just replace parts randomly, particularly since in my case the noise is generally quiet enough to be drowned out by opening the sunroof or a window, and has not progressed at all in a year to identify the culprit.