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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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S80 Wheezing noiseViews : 775 Replies : 9Users Viewing This Thread : |
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Sep 26th, 2019, 16:46 | #1 |
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S80 Wheezing noise
My S80 2.4D has developed a slight wheezing noise, which seems to be linked to the engine revs (rather than actual speed). It does not seem to affect power or MPG. Most noticable at low speeds.
Any idea what it might be?? |
Sep 26th, 2019, 20:23 | #2 |
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try listening with aircon on and with it off, see if the makes a difference
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Sep 27th, 2019, 09:38 | #3 |
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Sounds like a vacuum leak or possible blocked PCV valve! I would also check bearings in pulleys etc.
Last edited by jerryt; Sep 27th, 2019 at 09:40. Reason: more info |
Sep 29th, 2019, 08:24 | #4 |
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Sep 29th, 2019, 08:27 | #5 |
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Alternator bearing?
OK, long trip in the car - 500 miles+ No loss of power or fuel economy, but still the noise. Someone has suggested it could be the alternator bearing starting to go? The 'wheezing' could be a bearing noise I guess. Is this a common problem?? Car has done 120k.
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Sep 30th, 2019, 19:47 | #6 |
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Possable Turbo control valve
When you put your foot down then gears change do you get a sound like a dump valve on a boy racers car ?
Read a lot that this is caused by the Turbo Control Valve following link shows how to clean it but can buy them for around £40 ish https://www.youtube.com/watch?v=BPtABczQk3E Last edited by dped; Sep 30th, 2019 at 19:50. |
Oct 2nd, 2019, 07:41 | #7 |
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Power steering??
Thanks for all the suggestions so far, but none seem to fit. I have noticed that at the same time the car is making noise when steering the car at very low speed, ie parking in a car park. I don't know enough about how the power steering to know if the two could be related? All thoughts welcome.
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Oct 2nd, 2019, 13:19 | #8 |
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Bearings or pulley for power steering hydraulic pump?
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2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey |
Oct 2nd, 2019, 17:16 | #9 |
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Oct 3rd, 2019, 09:57 | #10 |
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Since the power steering pump is driven by the engine, I assume it would. I have no relevant Volvo experience with power steering pumps but on a previous car the problem was that the belt drive pulley rubber damping layer had perished and allowed the rim of the pulley to slip making a screeching noise which got worse if more power was applied to the belt at such times as when the steering was fully deflected or extra electrical power was being demanded of the alternator, but the steering was the main cause of drag on the belt. If this is the case with the Volvo, any problems with the belt might have serious repercussions if it came off the drive pulley. If I've got this wrong and this does not apply to your engine, I do apologise.
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2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey |
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