"mikem" wrote in message
ups.com...
Crankcase fumes are sucked into the induction manifold (and burned by
passing through the engine) via the Postive CrankCase Ventilation check
valve.

The question still remains....how does the moisture escape as modern engines
are not vented to the atmosphere but are a closed loop. We aren't talking
about crankcase fumes but about moisture supposedly being boiled off into
the atmosphere.