I just did an engine swap and my L59 has excessive crankcase pressure. If you remove the dip stick you can hear the vacuum and it will change the idle. I am very confused by this issue. The lines on the intake are molded, so it is obvious where they go. I have both of the lines that goto the valve covers hooked up.

I added a fitting onto the rear of the intake to goto to the brake booster. Whatever the sensor is on the front of the intake behind the throttle body was plugged.

The things that I have found are that these engines don't have a pcv valve and that the valve covers fail a lot. Is there a way to get around this with a catch can and a one way valve?

Any help, advice, ect would be nice..

 

Fixed orfice on the drivers side valve cover is plugged, or the line to the intake or the intake itself. I would guess the orfice. Pull the line off when its running go confirm.

 

Ok thank you I will check that tomorrow when I am at the shop.