[Beeger]

Me too

I experienced the same thing and found it a bit troubling. Compression was 45 psi on #2 cylinder. Teardown showed lapped rings. I figured it was blow-by. I'm rebuilding the engine now and look forward to seeing if it still is so "windy" after rebuild.

 

[Beeger]

Two years later

I mentioned the "windy" oil fill hole 2 years ago on an engine with lapped rings and poor compression. Well, I've rebuilt the engine and it runs dandy -- and I still have a mighty wind blowing out of this hole. The good news it that there is no oil blowing with it. I gather that the effect is normal, though I can't say I've noticed it with other cars.