My 2000 S80 2.9L non-turbo, 45K miles.

Seems to have valve noise. Aren't these self adjusting valve controls or something like that? Another word, do I need to do manual valve adjustment? OR thenoise could be something else?

Ok, I'll stop posting. Too much free time today.

 

Some have hydrolic lifters and some have solid lifters.
Once you take the black top cover off look and see if you have 4 Torxes screws around each cylinder. They screw into the Cam Cover.
If you have the screws then they are solid lifters.
If not hydrolic lifters.
Solid lifters will cost about $1000.00 to get adjusted.(maybe a little less but takes about 5 to 6 hours to adjust.

 

I went and test drove both a brand new 06 s60 and a 07 s80 3.2. The sounds your hearing are probably what I was wondering myself on my 02 s80 t6, nonetheless my engine sounds identical to a brand new volvo engine. So I would guess hydraulic lifters, also the Variable Valve Timing is going to be noiser. Just my thoughts...

 

On the New cars the Injectors are very loud.

 

Aftering reading more post, I think there are mention about oil O rings set replacement.Well, when I do my tune up, I'll look to see if it's manual lifter or not. If hydrolic then O-rings set. If manual, then valve adjustment is needed.

With that said, my car only has 45K mile, not only that, I noticed this loud engine noise a long time ago. Oh, we'll see. I'll report back.

 

I will bet oil pan o-rings.