QuestionI have recently fitted a weber dgev. I have oil dripping past the dipstick. I have a vent line from the valve cover
with a pcv valve running to intake manifold. When I leave the oil filler cap cracked open this solves my oil drip problem.The engine is running and sounds good. I am planning to install a breather in the valve cover so I don't need to crack open the oil filler.This gives me an entrance and exit for crankcase fumes and pressure. My question is this Is this an acceptable solution to my problem of oil dripping from the dipstick or am I creating another problem that I am not aware of yet.
AnswerIf you have the valve cover piped directly to the intake manifold, then you shouldn't need to "vent" the valve cover.
On the DGV, the normal connection is to not have a PCV valve, and pipe directly from the valve cover to the white pipe on the K&N filter housing that usually is used with webers.
When the car is running, pull your tube. You should feel vacuum on the hose and the quality of the running of the car should change (if plumbed to the intake and not the carb). Plumbing the valve vent directly to the intake manifold is cause the car to run funny, as you are creating a vacuum leak (if that is indeed how you have it routed)
I suspect that you either have the PCV backwards or the PCV is plugged/stuck. Take it out, and pipe directly between the carb intake and the valve cover. That should provide the venting you need.
BTW, too much crankcase pressure, as you describe, indicates the piston rings are worn excessively (or valve guides). Borrow or get a friend with a leak down tester to check how much "blow by" you have on each piston.
