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2000 V70R Whining/Buzzing Noise in Engine Bay

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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bmdubya1198
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Tue May 14, 2019 7:58 pm

I was listening to it again today, noise hasn't changed at all. It usually happens just after you rev the car, once the idle normalizes I'll hear it for a couple seconds and it stops. Other times it keeps going, but it sounds very spotty... it comes and goes.

The best way I can describe it is the sound of a digital camera focusing. Almost a "spraying" sound like the fuel pump when it's priming, but it's nowhere near the fuel pump. The sound it still most noticeable right around the power steering pump and AC compressor, to the left of the intake manifold.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by abscate » Wed May 15, 2019 1:35 am

How about an intake manifold crack, which would also explain missing boost?


1 SWMBO for 30 years
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6 Perfect Ladies in waiting
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1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Wed May 15, 2019 8:24 am

abscate wrote:
Wed May 15, 2019 1:35 am
How about an intake manifold crack, which would also explain missing boost?
Ya know, I thought about that. It sounds unlikely, but with this car you never know. A smoke test should reveal that.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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bmdubya1198
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Wed May 22, 2019 3:04 pm

I listened for it again the other day... it sounds like it may be coming from around the turbo inlet. Very weird... it's definitely electronic whatever it is. What could be making noise back there? I've changed the PTC already and that didn't make any difference, so I don't think it's that.

I just thought it was coming from under the intake manifold due to the way sound echos in the engine bay. I'm pretty sure it's not coming from there.

It's most noticeable just after I let off the throttle when revving in neutral. Usually it'll hiss/whine for a second then stop. Other times I'll park the car and it'll just start going. I'll see if I can upload another video.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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abscate
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Joined: Sun Feb 17, 2013 5:54 pm
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by abscate » Wed May 22, 2019 6:16 pm

CVVT cam?


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Wed May 22, 2019 6:53 pm

I don't think it's the cam. I checked the solenoid, but I don't think it's coming from there. I'll have to run it again with all the covers off and listen around.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by erikv11 » Wed May 22, 2019 11:22 pm

Exhaust manifold leak? They can tick and make some strange noises.

I see you are now thinking it is not near the belt path but removing the serp still seems like a good test.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 205k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 275k
'06 S60 R, 155k
gone: '96 NA 850 210k, '98 NA V70 182k

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abscate
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by abscate » Thu May 23, 2019 4:25 am

Letting off throttle is highest intake vacuum condition. That’s points to a vacuum or manifold leak, at least


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

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bmdubya1198
Posts: 2857
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: '98 V70 GLT
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Thu May 23, 2019 8:09 am

Definitely not a tick, it's more or a whine/buzz. Lemme dig up a video from a couple days ago. Hopefully you'll be able to hear it.

It would make sense to me that it's a vacuum leak thinking of the low/erratic boost issue this car is having, but it just sounds too electronic to me to be a leak.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

User avatar
bmdubya1198
Posts: 2857
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: '98 V70 GLT
Location: Charlotte, NC
Has thanked: 25 times
Been thanked: 68 times
United States of America
bmdubya1198

Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Thu May 23, 2019 8:35 am

Here's a video. I can hear it clearly, so hopefully everyone else will too! It's like a "pssssst psssst psssst" sound. On the video I can definitely hear it loudest in the back of the engine.



1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Charcoal M56 Swapped 188k
2001 S60 2.4T Black/Black 230k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 collection of parts... crushed... still have parts, PM if interested!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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