crank case ventilation

[zydeco]

and here's why. If you drill a hole in the sump, put a hose fitting on it, and plug the hose in to it, you've got a hose dangling around waiting to catch something as you're driving. If it snags something and yanks the hose out, you've got a big hole in your sump and no oil in a matter of seconds. Also, if you have enough blow-by, the breather may pump so much air into the sump, you'll make whipped cream!

The snagged hose bit is still a potential problem if the CCV fitting is at the top of the valve-cover but at least you'll have a *much* slower loss of oil than if you put it a hole in the sump.

Then again, maybe you're talking about routing it to the upper portion of the sump but I still think its a bit too risky.