I have a question about crankcase ventilation. I recently replaced the rear main seal and the oil pan gasket, which were leaking like sieves. I want to prevent these leaks from re-ocurring, and I think they might have been related to crankcase ventilation.

I race in F-Production, and have a dry sump. So my aluminum valve cover has an open vent to the dry sump tank. The only other vent is in the driver's side of the block, down low. One of my old books refers to this as being where the "oil separator" is attached. When I bought the car, this vent was plumbed to a catch can, which was sealed.

My theory (assuming proper seal and gasket installation) is that the sealed catch can didn't allow the crankcase to breathe, so it blew out the seal and the oil pan gasket. If I re-plumb this block vent to a vented catch can, in conjunction with the valve cover vent, will that be adequate ventilation? Or is there something else I should do?

Thanks for any help,
Tobey