nightwalker

more boost = more crank case pressure. Most people running big boost open up the size of the vents, or add another. just do a search.

barneyb

Not correct. At idle there is vacuum in the intake manifold and the PCV valve is open to the valve cover. So, the manifold will pull air out of the crankcase and air in through the vent hose. When boosting the PCV valve closes and the air flow reverses in the vent hose.

apagan01

iTrader: (299)

i will agree with you i missrepresented my statement, regarding the vent hose going into the intake and its design.

EVIL-EVO-8

That clears things up a bit. Im going to check the pcv tonight and put my catch can back on. Thanks everyone!

biggie5252

iTrader: (47)

I periodically spray maf cleaner through my pcv valve. Cleans it right up.

T2Small

iTrader: (1)

The PCV sometimes fails fairly quickly. I normally replace them about once a year or so. Much cheaper replacing PCV valves than the issues created by excessive crank case pressure.

If it's not the PCV, perhaps you do have a ring problem. I have seen it from new motors (mistakes were made).