Thanks to Bill Schooler I see how the system works now. There is no PCV
valve in '73 rather the system employs a fixed orifice ventilation
So, ho can this system malfunction? Seems fool proof. I guess the take off
at the tapped cover can somehow get clogged but that seems unlikely and mine
appears to be clear. Am I missing something?
> Before you pull the engine, check and make sure that the
> crankcase ventilation system is functioning properly. I've
> seen clogged PCV systems cause pressure to build in an engine
> and this causes oil to be forced out past the seals.
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