"Orval Fairbairn" wrote

The PCV valve was government mandated for pollution control only! It
makes no difference to the gov't if it harms your engine components, as
long as it meets THEIR requirements. It would be stupid to install one
on an aircraft.

While I believe your stand has merit, I think the truth is somewhere in the
middle. While some harm may be done, it is very little.

Otherwise, I don't think I would have gotten two of my last Detroit engines and
induction systems to over 200,000 miles. Added to that, the fact that these
engines had _no_ problem with their induction systems, at those miles.
--
Jim in NC