I'll double check again.
breather box and houses
the hoses going to the turbo?
what other hoses?

 

Vent box to induction hose and to cam cover.

 

ok, thanks.

 

what is positive pressure in the crank?

 

DO you mean crankcase?
Well turbo cars have some positive pressure but only a certain amount. When to much is built up it blows seals out. That usually happens when something in the system is clogged.

 

I just found out that the threaded slots where the cam cover bolts go are wider than the bolt itself. Over the years the owner might have taken it to grease monkey Pete who might have over tightened them or what have you. I have 4 5/16th bolts replacing the originals. I have one more to tap and insert the slightly bigger bolt. The oil was oozing from the bolt hole even though the bolt was still inside. I could put silicone around the bolt also.