I just bought a 2004 Volvo s80 2.9 i6 and i have small problem, it's not scary yet but I don't know what is it. So, when the engin idles i can hear some noise, like something is switching inside, click-changes the sound-click again and come back to the usual working sound. It does that in same intervals. RPM doesn't go up and down, they are sitting on 700rpm. Also i can hear whistling noise when i am driving with small throttle on low speed, when is on 1500rpm 15-20 mph. I checked the oil level long stick. I pulled out and no air coming from there, I don't think so it's PCV or ETA, or maybe it is... I don't cnow what can bee.
I made 2 videos so you can hear and look.
Thank you very much.

 

The click is your AC compressor cycling off and on

 

So basically, everything is ok?

 

Yup, turn your AC off, make sure your defrost is off and your cabin temp control to manual, the clicking should stop. The other sound seems normal.

 

And what about whistling sound when i am driving on low speed, like 15 mph, i can hear like something whistle in engine, like belt or something...

 

Hello ,
The whistling noise might be the PCV system , There was a recall on certain 04
Volvo S80s ,(PCV recall) mine was one of them..... and had it replaced by dealer for free...(so check to see if you have any open recalls)..

My S80 has also has 2.9 but mine has the turbo and 209,000 miles ,(I like these engines, yours sounds very healthy .... )

Hope this helps...

 

I can hear Turbochargers whistle at low speeds.

 

Yes, thank you.
I was also thinking it's PVC oil trap, but i sow on other videos that when it's PVC engine also blows air through dipstick oil check or oil cap on top, and that makes the sound, but I don't have that air coming out, I checked, nothing coming out it's completely still. And the sound is not constantly, when I give throttle disappears, so it's only on low rpm when vehicle is in motion... Maybe belt or something else, but thanks very much I appreciate that..

 

Ok guys. New moments, i think it's PCV broken. I couldn't notice because I didn't driven car very much, but thoday I been driven for a 3 hours through city and started to whistle and shaking when I come to complete stop. In firs hour of driving everything works perfectly, after that goes bad. When I push the gas it's stops, and when i start moving with applying throttle on low RPM-s starts to whistle, but strangely RPM-s are not moving, also no check engine lights.I have 2 videos for you so you can tell me for shure is it only PCV or ETM also. And can you tell me the best place for finding parts?
Thank you very much.

 

Anyone guys?

 

I would check your VIN number to check if your car has a recall concerning
your PCV valve ,Like I said before ,certain Volvo s80s had a recall on the PCV valve
because they would crack ,causing that noise ..... Volvo replaced mine for free
because mine was one of those affected ....

 

Oh, ok. So it's PCV valve for sure?
Where i can check that? On Volvo web site? Or i need to go in dealership? Thank you.

 

I checked on volvo web site and it says there is 0 recall for my vin number. So nothing from that right? I need to buy PCV?

 

I would put my money on it.....
after doing research on this car for 3 months (bought mine about 3 months ago)
seems to be a common issue with these engines,I guess recall was for the turbo
2.9 liter ...
But just want to give you a heads up ... it took Volvo almost 3 hours to do
the repairs , so I'm not sure how big the job would be..

 

1 mechanic already asked me 800$ for work. That's allot.

 

Yikes , I would shop around.... or maybe do it yourself ,
there are repair manuals on ebay that come on a dvd
and you load it onto your pc (it's basicly the same software that
Volvo uses ..... it sure comes in handy...

 

Do i need to do something with ECU? Computer in car? Reset or something? I don't think so...

 

I think the ECU is ok , no need to reset , also icarsoft makes a scanner that works on Volvo for a reasonable price ...... always a handy tool for this car... (instead of
going to the stealership every time a light comes on.....)

 

Thanks man, I appreciate that.

 

With that second set of videos the sound is way more obvious. Is it sucking air or pushing air out of the dipstick tube? Try doing the same thing but loosen the oil fill cap. It seems like there is something going on with the PCV system.