have a ? im running breathers on both valve cover's does this hurt or renderthe pcv valve usless what im asking is can i remove the pcv with a breather in both valve covers

 

You could remove the PCV valve, but it wouldn't be a good idea. The PCV system provides a vacuum sweep of the crankcase, removing harmful vapors and combustion gasses. It is a "positive" system.... it positively sucks the bad stuff out of the crankcase. With only "breathers", you will have nothing to clear the crankcase, other than the gradual buildup of blowby, that will eventually force its way out the breather.

The "old" cars didn't have PCV valves, but they had a "draft tube" that dropped down under the car, and developed a slight vacuum from the air passing by perpendicular to it as the car moved, and that vacuum pulled air in through the "breather" to clear out the crankcase.

Leaving harmful vapors in the crankcase will only lead to condensation on cool down, building up harmful acids in the oil.

And.... since the stock PCV system is "closed", by opening up your system with breathers (assuming your car is a 94 or newer MAF setup), you have created the equivalent of a small vacuum leak, that is pulling in air that has not been measured by the MAF sensor. Nothing the long term fuel corrections can't compensate for, but not what the designers intended.

 

Hopefully I don't hijack your thread, but I have a related question.

My 383 tends to launch the oil dipstick out of its tube during heavy acceleration. My PCV valve is still hooked up and is functioning properly (the valve rattles when you shake it). I was told that I need to get valve cover breathers to relieve some of the pressure in there. I've also noticed the condensation you're talking about...there was a decent amount of buildup on the underside of my valve covers when I removed them to install the new ones, but this could be due to the short trips I take (only three miles to work).

Would this be an exception to the "breathers are bad" rule? I'm getting sick of cleaning oil off of the underside of my hood, and I'd like to prevent the possibility of that oil ending up on my headers and lighting my car on fire.

 

I have a breather on each of my valve covers...

 

I personally use breathers but only becasue I was sucking oil thru the TB under load. This caused a blown head gasket and a bit of frustration in me. I plan on adding a crankcase evac setup this winter to the exhaust and that will fix both problems.

Q

 

If you are getting so much pressure in the crankcase that you are blowing the dipstick out, either something is plugged up in the PCV system, or you have a huge amount of blowby on the rings. With the engine idling, pull the oil fill cap off and listen for a "chuffing" sound, then hold you hand over the opening to feel any puffing of gasses out of the fill pipe. That would confirm a blowby problem.

I run the stock PCV system, no breathers, on an 800HP 381 nitrous motor. My dipstick stays put.