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07 XC70: sudden whine from front

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Durenol
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Durenol

07 XC70: sudden whine from front

Post by Durenol » Thu Sep 12, 2019 7:26 pm

2007 XC70, 48k on the odometer. Went to drive it tonight and there's a noticeable whine coming from somewhere up front- it sounds like the engine compartment but I'm not 100% sure. It doesn't sound like the high-pitched screech from something electrical, but an upper-midtone slightly harmonic sort of whine like something mechanical. It kinda sounds like a hairdryer on the fastest setting but without the rushing air noise.

This car was just driven this weekend out to a relative, (~25-30mi each way) and I don't think the sound was there at the time... however I can't be 100% sure since although the sound is very noticeable when standing next to the car, it's significantly muted when inside with the windows shut and is completely drowned out by road/wind noise when the car is moving.

Any thoughts? Dying fan? turbo? The car otherwise seems to start and run fine and there are no warning lights on the dash.



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- Pete -
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Re: 07 XC70: sudden whine from front

Post by - Pete - » Thu Sep 12, 2019 9:38 pm

Really need to get your noggin under there and pinpoint which area of the engine compartment it's coming from. Mechanics stethoscopes are like $3-4 at HF. You should be able to zero in on it with bare ears though.


2001 V70XC 135k
2004 V70 AWD 130k
2004 XC70 278k
2006 XC70 150k

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Re: 07 XC70: sudden whine from front

Post by jimmy57 » Thu Sep 12, 2019 9:40 pm

A good first check would be power steering fluid level.



Durenol
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Re: 07 XC70: sudden whine from front

Post by Durenol » Fri Sep 13, 2019 7:53 am

OK well a steth won't help because the whine disappeared as suddenly as it came. Can't get it to happen this morning. Wonderful :/

Power steering fluid is actually high not low. Although it's rather opaque (isn't is supposed to be at least kinda translucent? it might be overdue for flushing). Engine coolant is at MIN level line when engine is cold, I forget, is that the way it's supposed to be on this car? Taking the oil cap off and putting a rubber glove over the hole gets sucked in, so the PCV isn't toast at least.

Random weird sounds worry me....



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Re: 07 XC70: sudden whine from front

Post by - Pete - » Fri Sep 13, 2019 8:19 am

You’ll get a coolant message when running if it is low.


2001 V70XC 135k
2004 V70 AWD 130k
2004 XC70 278k
2006 XC70 150k

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