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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 »

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 »

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 »

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 »

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.
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Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by Wasamee »

Have you made any progress with this issue? I have a 2000 S80 T6 that makes that exact same sound.
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 »

That’s interesting. I actually ended up rebuilding my original ETM with the Sacer contactless TPS, but the noise is still there. I don’t think it’s the ETM.
It sounds like it’s closer to the belts than the throttle, but it’s very hard to tell.
'00 V70R Venetian Red/Charcoal M56 Swapped 199k
'03 S60 2.4T Silver/Black 117k
'07 XC90 V8 AWD Sport Titanium Grey/Black 174k
'91 944 Turbo Dark Green/Beige 175k
'92 245 Base White/Beige 249k
'99 BMW 528i
'01 Mountaineer 5.0
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by RickHaleParker »

bmdubya1198 wrote: Sat Apr 27, 2019 8:25 pm It sounds like it’s closer to the belts than the throttle, but it’s very hard to tell.
Have you tried taking the serpentine belt off, starting it up to see if the noise stops?
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 »

RickHaleParker wrote: Sat Apr 27, 2019 8:47 pm Have you tried taking the serpentine belt off, starting it up to see if the noise stops?
I have not, but I’ll give that a try.
'00 V70R Venetian Red/Charcoal M56 Swapped 199k
'03 S60 2.4T Silver/Black 117k
'07 XC90 V8 AWD Sport Titanium Grey/Black 174k
'91 944 Turbo Dark Green/Beige 175k
'92 245 Base White/Beige 249k
'99 BMW 528i
'01 Mountaineer 5.0
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by Wasamee »

It seems to be coming from the back of the engine near the passenger side.
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bmdubya1198
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 »

Wasamee wrote: Sun Apr 28, 2019 12:42 am It seems to be coming from the back of the engine near the passenger side.
Have you checked for any vacuum leaks back there? Sometimes that can cause a whistling noise.
'00 V70R Venetian Red/Charcoal M56 Swapped 199k
'03 S60 2.4T Silver/Black 117k
'07 XC90 V8 AWD Sport Titanium Grey/Black 174k
'91 944 Turbo Dark Green/Beige 175k
'92 245 Base White/Beige 249k
'99 BMW 528i
'01 Mountaineer 5.0
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k
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