Klaus, on a recent post for a 2004 v70, with oil leaks you mentioned checking
the PVC/Flame Trap.
I was under the impression these simple devices were replaced by a system
you now need to take a fair bit of the engine apart to get to.
Your description fits my 850 and earlier Volvo cars. So I lifted the hood and went looking:
The 2004 V70 and 2003 XC both have a small black "Y" part just before the intake manifold, that could contain the screen. The part does not appear to come apart... but maybe you replace the total Y now (?) and not just the plastic screen.
Anyone's thoughts/ guidance is welcome.
thx
Art

Turbo charged engines do not have a PCV valve, but do have a PTC nipple on the air pipe from the cleaner to the turbo.

All 5 cylinder engines have an oil speparator which is under the intake manifold. Most of the 'newer' cars have been using synthetic engine oil which is less apt to clog the oil separator.
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My name is Klaus and I am a V♂lv♂holic