Only for the sake of argument and because I think I have a fairly strong background in basic I/C Engine Design, I will argue with that point.Blowby past the rings will be in the crankcase most, and blowby past the valve guides would lead to pressure in the valvecover area.
Just because someone does "something" does not mean it's correct.....
Have you seen the oil drain back passages in the head and block??
It's ALL the SAME pressurized "box". Connecting hoses from the top to the bottom of the box does -very little- if nothing to decrease the pressure inside the box.....IMO.
My take is this:
VW vented the cam cover to the intake runners (and thus atmosphere).
That works.....mostly if not prefectly.....when the engine is in good condition and blow by is minimal. But the ports in the runners are too small to handle the increased flow in a tired engine.
Now, it would seem to me if those ports had even 1/8" holes in both of them, that would be plenty of flow.....but maybe not. Surely 3/16" holes would be big enough
But 5/16" as someone mentioned drilling them out to seems quite large......
My key question was:
Although I DID ask........What I don't understand, is the hose that goes from the cam cover to the No. 2 and No. 3 intake runners.....
Is there a restriction in the fittings someplace that lets pressure build up?
I have never had the hoses off the fittings on the intake runners....what is there?
But I don't see how running hoses from head to crank case relieves any internal pressure? You could have a balloon with many small hoses connected to the top and bottom of it, and the pressurized air inside will still be.....pressurized....What is the band-aid fix to bleed off the pressure and stop the oil seepage
Thanks again for sharing your experiences!