Proceed to perform an engine leak down test.
Look carefully at each spark plug as you remove them,
In preparation to perform the leak down test.
Smoke out of the valve cover breather
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"Butt load of smoke" does not equal PCV valve. The PCV valve is actually a check valve. It lets high pressure from the crank escape back to the intake plenum, and it prevents a backfire out of the intake from making its way back down in to the oil galley where it'd blow the pan off the bottom of the motor. It's possible you've had a problem for a while but the PCV valve has been working and all that smoke has been going back through the engine to get reburned. Pulling the plugs ought to tell you that right away, they'll be fouled (though they're going to be a little fouled because you just ran it and it was smokey). If not all fouled up (and there isn't one that looks really nasty), then do leakdown (But note, you don't need to do it three times. 
). Lots of smoke getting worse with higher engine RPM, in my experience anyway, generally going to be a busted ring. Could be a leaking valve stem seal, though. More oil in the top end with higher RPM means more oil to leak down the valve stem and get sucked in to the cylinder.
). Lots of smoke getting worse with higher engine RPM, in my experience anyway, generally going to be a busted ring. Could be a leaking valve stem seal, though. More oil in the top end with higher RPM means more oil to leak down the valve stem and get sucked in to the cylinder.
LOL..
And the quickest way to find the busted ring lands is to start pulling the rear spark plugs first..lol
More heat in those two rear cylinders. . . .
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