Vacuum Issues

[Rannos]

Originally Posted by cableguy0

Do you have a breather on the opposite valve cover from the pcv? Also is the rear main the only thing leaking. Generally excessive crank case pressure will pretty much push oil out from everywhere. I would be suspect of a bad rear main especially if its a 2 piece seal.

This is very true. The sbc in my truck now is set up for a good bit of nitrous and my machinist suggested I run a vacuum pump. The truck is street driven so I did not use one. It blows oil out EVERYWHERE except the rear main seal. I've tried PCV's and they didn't help (I didn't try a low vacuum one tho). Seems to do best with free flowing breathers and limited baffles but the breathers get oil soaked fast. I am planning to use one of the electric vacuum pumps off the old caddy's to try and sort it out.