so what are my options here? ive got the 2 holes in the exhaust camcover blocked and running it from both intake covers. this is where i need help, can i : A - run the 2 hoses into a t piece at the back of plenum then to my catch can. B - run the 2 hoses to the pcv valves id like to do option -A- but im worried as to relieve crank pressure, will this setup still relieve the pressure. iv already done a pcv delete and the setup i did raised pressure in the crank case pushing oil out the rearmain seal. i dont want this again!!!!! plz help
Don't delete the PCV valves....... They are there for a purpose I don't see the fascination people have with 'catch cans' .....unless it is a track car !!!!
bypassing the pcv valve just stops oil vapours being pushed into the engine and threw the combustion process and getting blowback. id prefer not having oil vapours going in my engine. it also simplifies the engine bay.
If the single hose between the CC and the T peice is the same size as the other two hoses then its creating a restriction. Other added benefits of removing the PCV valves is keeping sludge forming moisture and blowby gases in the crankcase and allowing unmetered air into the engine.
well enjoy sludge in your plenum while i keep mine clean hahahah bet this guy still has the EGR on his engine :rofl:
I have one hose running from the front fitting on each intake valve cover. These hoses run straight down and end just below the bottom of the car. Everything else is blocked off or removed. I don't use a catch can and I didn't T the 2 hoses together. I've had this setup for 2 years (40k miles) and it works great. I've had a valve cover off and everything is clean and I also had an oil analysis done which showed the oil was fine.
I haven't figured out how to put up a pic yet but it's just 2 hoses from the fittings on the front of the intake valve covers. They run straight down so the ends are slightly lower than the bottom of the car. Yes they are vented straight to atmosphere. They will blow a small amount of vapor out when the car is running from anything that blows by the rings. In cold weather they will drip some condensation.
I am skeptical this is blowing oil out your rear main seal. I'd suspect an issue with the sump carrier gasket, a problem my car had shortly after the installation of a new rear main. Interestingly, this is what all cars had back 80 or so years ago before PCV systems were invented. As a modification, it's about as smart as doing a 1930's conversion on any other part of the car haha. I would not want to own a motorbike near where this guy lives. All Z32's with PCV's have oil in the plenum, have a look. the two valves in some situations, due to the angle of the banks, simply dump oil into the manifold. or that is my understanding anywho! whether or not that's an issue to you is a different concern.
20 years of crankcase oil vapour turns into a thin film of oil throughout the plenum. That said, I see no reason why you can't simply block the pcv's (provided you don't have excessive blow by and just have them venting out via intake cam covers back into the intake pipes. This will stop the issue of oil entering the plenum on hard right hand turns (though I'd doubt this would really be a problem for anyone who isn't tracking their car anyway).
I really doubt that's it. Otherwise you'd also probably be blowing the dipstick tube. I'd bet either the rear main retainer gasket or incorrect rear main installation.
cant see the rearmain gasket failing as its just been put in a rebuilt engine ands its oem nissan gasket. if this dosent work then ill call the shop that assembled the shortblock to sort it out
