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'98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

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
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1997 - 2000 V70, V70 AWD
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E Showell
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E Showell

'98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by E Showell » Tue Jan 03, 2017 9:52 am

Car is a base model '98 V70 with 5 spd. manual trans and fwd., non-turbo.

Recent work -- 1) complete ignition tune up (Volvo plugs, Bosch Cap & Rotor, Bougicord wires); 2) Timing belt, water pump & serpentine belt replacement -- (Contitech belts, Aisin water pump, INA pulleys & brand name (can't recall which one) tensioner); 3) Front and Rear O2 sensors changed (Bosch for both); 4) replaced accelerator cable and engine air cleaner; 5) oil change.

On the drive home from Thanksgiving visit to in laws in Western NY, I got a CEL with Codes P0133 and P0140- if you check back through my post history, these codes seem to reappear annually about this time over the past couple years. Those are both O2 sensor codes, although many recount that they can be produced by a vacuum leak.

Since replacing the O2 sensors (yesterday) the CEL was extinguished and hasn't reappeared, although I suppose I have to put a few hundred miles on the car to be certain the codes are gone. While the codes were present this past weekend, the car started missing intermittently under load on a local state highway at around 50 mph (before all the recent work). That miss seemed to go away on its own. The car is running flawlessly now (I suppose I just cursed myself).

Here's the subject of the post -- around the same time I started getting the codes, I also began hearing what literally sounds like a turbocharger spooling up when accelerating in lower gears -- 1st, 2nd, between 2 to 3 K rpm. Now unless someone secretly installed a turbo in my car while I wasn't looking, it can't be a turbo spooling up. My mechanic heard it (on a very brief test ride when the car was having some other work [T-belt] done (I still don't trust myself to do a T-Belt change since the consequences of failure are too high a cost for me to bear right now), but said he didn't know what it was. I have looked around under the hood for a vacuum leak, but haven't been spraying starting fluid around in the engine bay. I have had the car for more than 7 years and never heard this sound. The car seems to be running well and it would not appear that the whine is affecting performance. The whine was present before all the recent work and did not go away as a result of the recent work.

Any thoughts as to what this could be? I'm stumped.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)

scot850
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scot850

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by scot850 » Tue Jan 03, 2017 1:39 pm

Hi Evan,

Can you record the noise and post?

Can you replicate the noise with the car standing, in neutral at the rev-range you mention?

Are you able to identify a rough area of the engine bay where the noise is coming from?

As a best guess if it only started after the new parts were fitted, then chances are it is something in the areas where the repairs/servicing was carried out. I'd be looking at one of the bearings in the serpentine belt area or the T-belt pulleys. Another possibility was I had a shreeking from my pulley system when coolant got on the serpentine belt, so maybe the belt or pulley is contaminated?

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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E Showell
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E Showell

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by E Showell » Tue Jan 03, 2017 2:22 pm

Neil -- The whine appears to be coming from the timing belt side of the engine, but it was present before any of the recent work was done. I could try to record, but it is very subtle -- if you were in the passenger seat, odds are you wouldn't even notice it if I didn't point it out.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)

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theWIFES_S70
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theWIFES_S70

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by theWIFES_S70 » Tue Jan 03, 2017 7:16 pm

Possible whines from pieces that spin:
- Power steering pulley?
- Serpentine belt pulley?
- A/C Pulley?
- Timing belt roller?
- Timing belt tensioner?

I get a weird whine and "clunk-clunk-clunk" every so often, but it's from the driver's side of the engine. Near the air pump.
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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E Showell
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E Showell

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by E Showell » Wed Jan 04, 2017 5:14 am

Three of those are brand new.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)

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abscate
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abscate

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by abscate » Wed Jan 04, 2017 5:17 am

What Neil said:

Have your lovely assistant spool up the revs while you listen with a hose in your ear.

That will tell you if its engine or driveline at very least
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

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theWIFES_S70
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theWIFES_S70

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by theWIFES_S70 » Wed Jan 04, 2017 10:03 am

abscate wrote:What Neil said:

Have your lovely assistant spool up the revs while you listen with a hose in your ear.

That will tell you if its engine or driveline at very least
Yes, and make sure someone films you doing it so we can all see how it's done! :mrgreen:

Good luck pinpointing the noise!
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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abscate
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abscate

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by abscate » Wed Jan 04, 2017 11:36 am

First time my neighbors saw this they locked up all the children
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

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E Showell
Posts: 3016
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
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E Showell

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by E Showell » Thu Jan 05, 2017 5:06 am

Well. It is definitely engine-related. Revved up the engine in neutral at a stoplight and the whine was present.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)

User avatar
abscate
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Posts: 20539
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
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Trinidad & Tobago
abscate

Re: '98 V70 Stick, Non-Turbo, FWD -Mystery sound like turbo spooling up @ between 2K & 3K RPM

Post by abscate » Thu Jan 05, 2017 6:19 am

That's good news. I was worried it was funky driveline something or transmission.

One of the idler pulleys, alternator whistle, maybe a resonant vacuum leak?
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

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