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volvo hum (no not the song!) 2009 C70 #4574869
11/15/17 11:20 AM
11/15/17 11:20 AM
Joined: Jan 2009
Posts: 18
RI
cudavid Offline OP
cudavid  Offline OP
Joined: Jan 2009
Posts: 18
RI
Ok, wife's car, 65K , shares same platform as the 40 and 50 / 60 Volvo series cards I think.
Humming noise getting louder in past 6 months. I bet front wheel bearings and planned them some day, well then BOTH axle boots split between oil changes and spewed grease, ok, do new high quality GNK axles and SKF bearings(OEM), at same time.
No real change!

Ok must be tire noise, 25K on tires, did rotate again, no change, ok, screw it, new tires, no change!
Back wheel bearings feel fine, but will do them this weekend.
If this fails what next!. GRRRR

Re: volvo hum (no not the song!) 2009 C70 [Re: cudavid] #4574886
11/15/17 11:41 AM
11/15/17 11:41 AM
Joined: Feb 2007
Posts: 3,700
Southeast
meep Offline
meep  Offline
Joined: Feb 2007
Posts: 3,700
Southeast
does hum:
change with speed?
change with engine rpm?
change with gear?
change with load?
do it in neutral?
change with steering input?
change with brake input?


2018 F150
2015 crv (wifey!)
Re: volvo hum (no not the song!) 2009 C70 [Re: cudavid] #4574887
11/15/17 11:42 AM
11/15/17 11:42 AM
Joined: Sep 2015
Posts: 1,595
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,595
USA
If you can hear it at low speed, stand outside the car and have someone drive past you while you listen to try to localize the noise source.

Re: volvo hum (no not the song!) 2009 C70 [Re: cudavid] #4574925
11/15/17 12:25 PM
11/15/17 12:25 PM
Joined: Nov 2015
Posts: 17
St.Cloud MN.
AndyB Offline
AndyB  Offline
Joined: Nov 2015
Posts: 17
St.Cloud MN.
Possible to jack up car and put on jack stands? You could then run it in gear and pinpoint the sound?

Re: volvo hum (no not the song!) 2009 C70 [Re: cudavid] #4574944
11/15/17 12:47 PM
11/15/17 12:47 PM
Joined: Feb 2014
Posts: 2,604
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,604
Canada
Just make sure it's not coming from the engine.
If it's noticeable when the car is idling in place, I'd seriously suggest looking into getting the PVC system REPLACED. Failure to do so will result in blown engine seals.


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Say "no" to Turbo!
Re: volvo hum (no not the song!) 2009 C70 [Re: cudavid] #4575092
11/15/17 02:54 PM
11/15/17 02:54 PM
Joined: Aug 2017
Posts: 664
MN
14Accent Offline
14Accent  Offline
Joined: Aug 2017
Posts: 664
MN
Does the passenger side axle have a stub shaft with a carrier bearing? That's my bet if it does.

*edit* Looks like the axle and bearing are one piece. Scratch that. I would look into the PCV as well. With the engine running and the noise happening, pull the oil cap. Is there excessive vacuum? Does the noise stop?

Last edited by 14Accent; 11/15/17 02:56 PM.

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