Strange noises

oldgreybloke · Nov 1st, 2019, 13:28

I have had a 2011 P3 V70 D5 205 6 sp auto (72k) for about a year and have noticed that it emits an odd sort of whingeing or moaning noise (no, not from the passenger seat!) at low speeds. It is not apparent at higher speeds but that could be because it is masked by other noise.
I have never had an auto before and am wondering if it has something to do with the gearbox. Or it is perhaps the turbo? It varies in pitch as the revs rise and fall. It is not loud or particularly intrusive (yet) but it is just odd and I'm sure it shouldn't be doing it in an otherwise refined quality vehicle. Or is it a case of "they all do that, sir". I have had whineing turbos before but it is not such a high pitch as that. As I said, more of a whinge.
I read the thread on replacing atf in the hope that it might give me a clue, but no. It has never been used for towing but it did spend it's life before my ownership in the London area and therefore could have been in stop/start traffic a lot. Could it be a sign that the fluid needs changing?
The gearbox works as it should otherwise as far as I know. Changes gear smoothly, kicks down etc.
Sorry it's a bit of a long winded post but any thoughts would be welcome.

ShadeTek · Nov 2nd, 2019, 11:16

Does the whine vary with engine speed or road speed? If you are parked and rev the engine, does the whine vary if at all?

oldgreybloke · Nov 2nd, 2019, 14:07

It varies with engine speed. It is most apparent at low revs (1200- 1500) at low road speeds as in local urban driving. The noise rises and falls with the revs. Once you get beyond low speeds it disappears or is masked. I have tried just reving the engine in neutral and there is a whine which again disappears with higher revs as engine noise intrudes. I think it is perhaps the same noise that translates into a rising and falling whinge as the revs change in slow motoring. I have not tried running with the aircon switched off to see if that affects or stops it.

k6chris · Nov 2nd, 2019, 18:20

Does you power steering make a noise when you turn at slow speed?? I have a similar noise, which seems to be caused by an ingress of air into the feeder pipe / PS fluid reservoir. Currently being fixed (I hope).

Model flyer · Nov 5th, 2019, 10:36

Could it be the air con pump ? These can make a shinning noise that get more noticeable if the gas is low. As your car is a few years old it might be worth getting it regassed. Dont use one of the diy top up culindersbut get it regassed with new lube at a propper air con specialst. We had a similar problem with a different make of car some years ago and the main dealer quoted over a £1k to fit new un needed pump . local ac secialist did job for £50 and car was super quiet after that with ice cold ac.

oldgreybloke · Nov 5th, 2019, 10:43

I have yet to test it with aircon off as it's in the body shop at present. Soon as I get it back I will check. Could be aircon related thanks.

oldgreybloke · Dec 2nd, 2019, 18:15

Thankyou modelflyer. It disappears with the aircon switched off.

vogron · Dec 3rd, 2019, 07:59

I had exactly the same issue. The strange sound changes with the revs and happened only on low RPM as you said. Once I turned off the AC the noise 100% disappeared. Based on my research it caused by low gas level or the failure of the compressor. Basically it's a common issue, you can find many volvo videos in YT with the same problem.

https://www.youtube.com/watch?v=01zWme5Tlyg

I will refill the gas on the next spring since it's the original in it.

Nov 1st, 2019, 13:28	#1
oldgreybloke Master Member Last Online: Apr 12th, 2024 14:02 Join Date: Aug 2012 Location: peterborough	Strange noises I have had a 2011 P3 V70 D5 205 6 sp auto (72k) for about a year and have noticed that it emits an odd sort of whingeing or moaning noise (no, not from the passenger seat!) at low speeds. It is not apparent at higher speeds but that could be because it is masked by other noise. I have never had an auto before and am wondering if it has something to do with the gearbox. Or it is perhaps the turbo? It varies in pitch as the revs rise and fall. It is not loud or particularly intrusive (yet) but it is just odd and I'm sure it shouldn't be doing it in an otherwise refined quality vehicle. Or is it a case of "they all do that, sir". I have had whineing turbos before but it is not such a high pitch as that. As I said, more of a whinge. I read the thread on replacing atf in the hope that it might give me a clue, but no. It has never been used for towing but it did spend it's life before my ownership in the London area and therefore could have been in stop/start traffic a lot. Could it be a sign that the fluid needs changing? The gearbox works as it should otherwise as far as I know. Changes gear smoothly, kicks down etc. Sorry it's a bit of a long winded post but any thoughts would be welcome. __________________ XC 60 D5 230 SE Lux. Polestar Engineered. TVR Chimaera 500 - regrettably departed Porsche RS Carrera 2.7 - In my dreams... Semper in excretia sumus, solim profundum variat

Nov 2nd, 2019, 11:16	#2
ShadeTek Premier Member Last Online: Apr 20th, 2024 19:38 Join Date: Dec 2002 Location: Renfrewshire View Photos By: ShadeTek	Does the whine vary with engine speed or road speed? If you are parked and rev the engine, does the whine vary if at all? __________________ Tek-Emo Villis Emo Bis V70 SE NAV 1.6 D2 2015MY POWERSHIFT, D4162T, 93000miles, RED. /VOL FCR/PEPER OBD2/Acron 9135 OBD2/L.E.D Flasher/VDASH/ANCEL BA301/Topdon Top Scan

Nov 2nd, 2019, 14:07	#3
oldgreybloke Master Member Last Online: Apr 12th, 2024 14:02 Join Date: Aug 2012 Location: peterborough	It varies with engine speed. It is most apparent at low revs (1200- 1500) at low road speeds as in local urban driving. The noise rises and falls with the revs. Once you get beyond low speeds it disappears or is masked. I have tried just reving the engine in neutral and there is a whine which again disappears with higher revs as engine noise intrudes. I think it is perhaps the same noise that translates into a rising and falling whinge as the revs change in slow motoring. I have not tried running with the aircon switched off to see if that affects or stops it. __________________ XC 60 D5 230 SE Lux. Polestar Engineered. TVR Chimaera 500 - regrettably departed Porsche RS Carrera 2.7 - In my dreams... Semper in excretia sumus, solim profundum variat

Nov 5th, 2019, 10:36	#5
Model flyer Master Member Last Online: Dec 15th, 2023 18:46 Join Date: Jan 2006 Location: Kent,pothole capital of UK.	Could it be the air con pump ? These can make a shinning noise that get more noticeable if the gas is low. As your car is a few years old it might be worth getting it regassed. Dont use one of the diy top up culindersbut get it regassed with new lube at a propper air con specialst. We had a similar problem with a different make of car some years ago and the main dealer quoted over a £1k to fit new un needed pump . local ac secialist did job for £50 and car was super quiet after that with ice cold ac. __________________ The secret of flight is to aim at the ground and miss ! Previous Volvos 740 GLE . V40 CD ,V70 2.4 SE LPT.V70 D5 P2. V70 D5 Se Lux P3. Current Jaguar XF Sportbrake but still like Volvos

Nov 5th, 2019, 10:43	#6
oldgreybloke Master Member Last Online: Apr 12th, 2024 14:02 Join Date: Aug 2012 Location: peterborough	I have yet to test it with aircon off as it's in the body shop at present. Soon as I get it back I will check. Could be aircon related thanks. __________________ XC 60 D5 230 SE Lux. Polestar Engineered. TVR Chimaera 500 - regrettably departed Porsche RS Carrera 2.7 - In my dreams... Semper in excretia sumus, solim profundum variat

Nov 2nd, 2019, 18:20	#4
k6chris New Member Last Online: Feb 13th, 2020 12:35 Join Date: Apr 2019 Location: Nottingham	Does you power steering make a noise when you turn at slow speed?? I have a similar noise, which seems to be caused by an ingress of air into the feeder pipe / PS fluid reservoir. Currently being fixed (I hope).

Dec 2nd, 2019, 18:15	#7
oldgreybloke Master Member Last Online: Apr 12th, 2024 14:02 Join Date: Aug 2012 Location: peterborough	Thankyou modelflyer. It disappears with the aircon switched off. __________________ XC 60 D5 230 SE Lux. Polestar Engineered. TVR Chimaera 500 - regrettably departed Porsche RS Carrera 2.7 - In my dreams... Semper in excretia sumus, solim profundum variat

Dec 3rd, 2019, 07:59	#8
vogron New Member Last Online: Apr 24th, 2024 08:33 Join Date: May 2019 Location: Budapest	I had exactly the same issue. The strange sound changes with the revs and happened only on low RPM as you said. Once I turned off the AC the noise 100% disappeared. Based on my research it caused by low gas level or the failure of the compressor. Basically it's a common issue, you can find many volvo videos in YT with the same problem. https://www.youtube.com/watch?v=01zWme5Tlyg I will refill the gas on the next spring since it's the original in it. __________________ 2011 XC70 D5 205hp Last edited by vogron; Dec 3rd, 2019 at 08:01.

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