Login   
C6owners :: Forums :: C6 Support :: The Garage
<< Previous thread | Next thread >>

High pitched noise, independent of engine speed, car speed?
Home   Forum Rules    Forum Help  Conversion Tools
   
Please Register to enjoy additional Member Benefits
Author Post
bigbruggsy   
Thu Jan 03 2019, 09:43am
Joined: Mar 26 2018
Member No: #3483
Location: Den Bommel
 Hello all. I'm trying to chase down the source of a high pitched noise that seems to be coming from the front of my C6. It can be heard from the drivers seat and front passenger seat. At first I thought it was an electric sound coming from the front speakers. Its not present all the time, independent of car speed and engine speed.
Some days the noise isn't present at all.
Any ideas?
Dan595   
Thu Jan 03 2019, 11:59am
Joined: Nov 26 2010
Member No: #299
Location: Wiltshire
 Heater fan? Try adjusting fan speed. Mine is noisy at one position.

bigbruggsy   
Thu Jan 03 2019, 03:44pm
Joined: Mar 26 2018
Member No: #3483
Location: Den Bommel
 Thanks Dan595, Good suggestion, I forgot to mention I've tried that too, switching off the fan makes no difference. Also switching off the stereo doesn't affect the sound either.
Ciaran2   
Thu Jan 03 2019, 11:36pm
Joined: Dec 30 2018
Member No: #3789
Location: .
 Is it like a high pitched groan / whine?
Does it change if you touch the accelerator, even gently?

I've had a similar noise in the C6 (and in quite a few other cars, a Mondeo, Fiesta and a Volvo S40 to name some), it sounds like some kind of vacuum hose / pump or something and is responsive to even a very light throttle touch).
bigbruggsy   
Fri Jan 04 2019, 07:43am
Joined: Mar 26 2018
Member No: #3483
Location: Den Bommel
 Hi Ciaran2, its more like a high pitched buzz, it really sounds electrical rather than a mechanical sound. Nothing I do can replicate or affect the sound. Somedays its their occasionally, somedays not there at all. Very weird.
AndreSMCXXMC6   
Fri Jan 04 2019, 04:13pm
Joined: Sep 09 2011
Member No: #615
Location: Groesbeek
 Have you tried to switch off the fan in the middle console that controls the airflow to the rear passengers.
Ciaran2   
Sat Jan 05 2019, 05:27pm
Joined: Dec 30 2018
Member No: #3789
Location: .
bigbruggsy wrote ...

Hi Ciaran2, its more like a high pitched buzz, it really sounds electrical rather than a mechanical sound. Nothing I do can replicate or affect the sound. Somedays its their occasionally, somedays not there at all. Very weird.


It could be the cooling fan inside the rear of the display, it might have picked up a bit of dust / dirt and be intermittently off balance. This fan is small and therefore rotates quite fast, they can make a scratching / buzzing sound when loaded up with dust, or the bearings are drying out.
Quite similar to computer fans in the same circumstance.


Ciaran
bigbruggsy   
Sun Jan 06 2019, 09:21am
Joined: Mar 26 2018
Member No: #3483
Location: Den Bommel
 Wow that could be it! I'll have a look online to see how to get to the fan so I can inspect it.
AndreSMCXXMC6   
Sun Jan 06 2019, 03:28pm
Joined: Sep 09 2011
Member No: #615
Location: Groesbeek
 That fan is only in an first year C6 with the RT3 system.
bigbruggsy   
Mon Jan 07 2019, 06:54am
Joined: Mar 26 2018
Member No: #3483
Location: Den Bommel
 Oh, my cars a 2006 model with what I think is the RT3 system. Is the fan easily accessible?
ul9601   
Mon Jan 07 2019, 06:40pm
Joined: Dec 14 2014
Member No: #1975
Location: Auckland
 I think mine had that problem - intermittent. I thought it was related to a/c fan but this could be the source. Mine was built in November 2006 and it had RT3.
I tried get a garage to have a look but that wasn't going anywhere.
 

Jump:     Back to top

User Colour Key:
Head Administrator, Administrator, C6 owner, Technical Expert, C6 Premier Discount Club