Quote Originally Posted by Snarf77 View Post
I can't tell if you're fishing for an argument or what, but adding a catch can setup that maintains PCV isn't going to FUBAR anything.
Did you read his dual catch can idea?


I don't have a problem with the catch can-- I have a problem with his idea for a catch can!


First off the breather hose needs to be free for positive clean airflow into the crankcase. Secondly, what is the can going to do besides possibly impede this ability flow properly??? No, oil vapors come in through the breather hose. Secondly, the catch can doesn't stop the system from being a positive pressure system. It merely instead of dumping the oil, water vapor, unburnt fuel into the intake puts into the in a can then depending emissions standards either vents to the atmosphere or back into the intake just minus much of the aforementioned stuff.

My big diesel engine has a PCV that positively vents right out on the front axle of the truck.