Much like the B2xx Volvo engines the B52xx 5 cyl (and probably 6 cyl) variants can run into crankcase ventilation issues, even with a well maintained PCV system during extreme use and constant high-rpm running.
So, the thought from here is to plumb the cam cover to a breather bottle so as to prevent excessive pressure.
Quite simply, tig a couple of AN bungs (may 8AN or 10AN) into the cover and run these into a single line, and onto a catch-can/breather bottle.
Rob and I were talking about this a few days back, some people have done it already to 5 cyl engines and seemingly purchase used camshaft covers, modify them and swap them over.
We both thought that this idea didnt sit that well as the cam cover actually serves the purpose of being the upper camshaft journals and does not have removable bearing shells.
So, the preference is for Rob to retain his and for me to retain mine and simply modify the ones we have.
So, since I'm keen to remove mine, do the work and get it back on the car as quickly as I can (same for Rob), I thought I'd take a look at one first and work out where it'd be best to tig the bungs it and if/how it needs to be baffled.
Rob had this one leftover from the 850 that he wrecked, so this one will serve as the one to have a good look at.
I'll degrease it all first and have a good look at it.