Reasons for excessive exhaust smoke?
I read here or in the factory service manual that a way to check the PCV is to remove the oil filler cap with the engine running and hold a piece of paper or something like a 3x5 card over (close to) the valve cover oil filler opening. If the paper is pulled the filler opening, the PCV works.
That proves the PCV on a fully functioning system.
But if the paper is not sucked down, does not mean the engine is shot. It just means you have more checking to do.
If the paper is not sucked down;You
may have a CC air leak somewhere else. or
there is a restriction or plug in the PCV line between the valvecover and the discharge port , or
the breather ain't breathing, or
in some cases, a wrong basegasket under the carb.
I have seen;
PCVs frozen up with ice,
lines sucked flat,
breathers plugged up,
and wrong gaskets,and
missing baffles under the PCV, AND
too much oil in the CC, or oil mixed with something else.
This last one is not common so often gets missed. When the crank is sitting in the oil and spinning, it creates a tremendous cloud of oil-mist all thru the engine. The PCV picks it up and out the tailpipe it goes as blue smoke.
