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

Post by abscate » Fri May 24, 2019 3:41 am

Rhythmic 3 Hz burst of 500 Hz metallic sound. That fancying language makes me technical And is absolutely no value in solving the problem.

I would get a pipe stick in my ear and follow the end around the engine To locate the source that way. When it gets loud , you are close
Empty Nester
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Fri May 24, 2019 8:18 am

Yeah, I'll have to poke around a little more and see if I can narrow it down.

But what's the point in describing problems if you can't throw some technical speak in there?
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
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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abscate
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by abscate » Sat May 25, 2019 5:09 am

abscate wrote:
Fri May 24, 2019 3:41 am
Rhythmic 3 Hz burst of 500 Hz metallic sound. That fancying language makes me technical And is absolutely no value in solving the problem.

I would get a pipe stick in my ear and follow the end around the engine To locate the source that way. When it gets loud , you are close
It’s more like 1 Hz

CVVT solenoid
tCV
Purge valve

One of those. Pull wire on each while idling, see if it’s stops
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by RickHaleParker » Sat May 25, 2019 10:37 am

abscate wrote:
Sat May 25, 2019 5:09 am
Rhythmic 3 Hz burst of 500 Hz metallic sound. That fancying language makes me technical And is absolutely no value in solving the problem.

I would get a pipe stick in my ear and follow the end around the engine To locate the source that way. When it gets loud , you are clos

It’s more like 1 Hz
Human hearing range is 20-20,000 Hz. A few people can hear as low as 15 Hz.
Unless you have superman hearing, you are not hearing 1 & 3 Hz.
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Sat May 25, 2019 10:43 am

I guess we just have super human hearing!
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
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 erikv11 » Sat May 25, 2019 2:32 pm

RickHaleParker wrote:
Sat May 25, 2019 10:37 am
abscate wrote:
Sat May 25, 2019 5:09 am
Rhythmic 3 Hz burst of 500 Hz metallic sound. That fancying language makes me technical And is absolutely no value in solving the problem.

I would get a pipe stick in my ear and follow the end around the engine To locate the source that way. When it gets loud , you are clos

It’s more like 1 Hz
Human hearing range is 20-20,000 Hz. A few people can hear as low as 15 Hz.
Unless you have superman hearing, you are not hearing 1 & 3 Hz.
According to the post, he's hearing 500 Hz. He's using 3 Hz and 1 Hz to refer to how often the rhythmic, 500 Hz sound occurs.

There, now I have also contributed more of nothing to solving the problem!
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
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'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by wizechatmgr » Sat May 25, 2019 6:00 pm

At what RPM is this car idling when we hear this noise? My thought is valve train or a nasty vac. leak.

Abscate had a weird one where the hose going to a check valve would suck closed but then blow open while it had pressure... Made for some really weird symptoms. Hose looked like one that a cartoon character put an acme bomb in... Split on both sides right down it for several inches.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~187k miles

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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Sat May 25, 2019 6:51 pm

It's idling totally normal, about 850 RPM. I heard it LOUD earlier when my cousin pulled it off the alignment rack at his job, but it went away as usual. It's very weird, it just comes and goes when it pleases.

I think I know the hose you're talking about, the one under the intake manifold that goes to the check valve and then another hose to a vacuum tee. That hose was split in the same way when I first bought this car. I think just about every vacuum hose on this car was split like that, plus the ETM was bad. I have no idea how anyone drove this car before all the work I did, it was an absolute wreck mechanically.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
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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bmdubya1198
Posts: 3782
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: 2K V70R M56
Location: Charlotte, NC
Has thanked: 41 times
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bmdubya1198

Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by bmdubya1198 » Wed Jun 05, 2019 3:35 pm

Checked it out again today, and I knew for SURE it was the ETM when the car didn't start (for some reason it does that sometimes when I clear codes in VIDA) and the ETM continued whining. Once I got it running after a few minutes, it continued as usual.

Now I'm feeling like my other issues are related to an ETM wiring issue. I know the ETM itself isn't the problem because I've replaced it 3-4 times already.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
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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RickHaleParker
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Re: 2000 V70R Whining/Buzzing Noise in Engine Bay

Post by RickHaleParker » Wed Jun 05, 2019 6:59 pm

bmdubya1198 wrote:
Wed Jun 05, 2019 3:35 pm
Now I'm feeling like my other issues are related to an ETM wiring issue.
There are known issues with that ETM/ETB loom.

"When there are diagnostic trouble codes stored for the ETB, it doesn’t necessarily mean that the ETB is defective. A large number of failures are caused by poor tension on the ETB connector plug. Volvo acknowledged that problem and released the ETB harness repair kit PN.31409380."
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

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