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2000 V70R Whining/Buzzing Noise in Engine Bay

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Tue Apr 16, 2019 6:18 pm

scot850 wrote:
Tue Apr 16, 2019 5:20 pm
The ETM initialises when you switch the ignition on. It whines and buzzes but for only a few seconds or so. If it continues to do so it be it is failing.

Neil.
I'm familiar with that noise, but I don't think that's what it is. It's similar, but the noise goes up and down, unlike the ETM noise. I can still hear the ETM though, so I'm pretty sure it's not the same noise.


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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by callahanoffroad » Wed Apr 17, 2019 8:24 am

It sounds like bearing clatter to me. I hear metal rubbing. It sounds very similar to the noises my belt tensioners made before my timing belt water pump debacle. But this is all speculation from your video! I'd pull the t/belt cover and see if it gets louder.


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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by abscate » Wed Apr 17, 2019 11:44 am

No, its a high pitched, like 1kHz buzz.

Im thinking alternator or possibly CVVT hub wear noise.


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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Wed Apr 17, 2019 12:31 pm

Yeah, it's definitely not mechanical like a bearing.

I listened to it this morning, thinking it may be the ETM as I listened in that area, but I definitely hear it most around the alternator area. Maybe it's the alternator, who knows. I'll take a closer listen this afternoon. I wouldn't be surprised if it was coming from the A/C compressor either, there's a wire nut on one of those wires from a previous owner. No idea why it's like that.

I won't 100% rule out the CVVT hub either, that makes a grinding noise on startup sometimes. However the buzz seems to be ahead of that area.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Black M56 Swapped 187k
2007 XC90 V8 AWD Sport Titanium Grey/Black 150k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green/Gray "129k"
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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