340 valve cover fill turn cap leaking oil

[northeastmopar]

340 valve cover fill turn cap leaking oil at high rpm? Where can I get a new gasket that goes under that cap. I think mine is just all dried out and

 

[CRUZE 418]

Is there a baffle under the cap? My '72 did not, and the cap was always weeping. I scarfed a baffle in, no more weeping.
My pcv valve is good.

 

[oldkimmer]

Replace the pcv valve. Kim

 

[northeastmopar]

Replace the pcv valve. Kim

The PVC valve which is on the other cover seems to be fine. My understanding is if the ball inside rattles when you shake the valve, then it is OK.

 

[oldkimmer]

The PVC valve which is on the other cover seems to be fine. My understanding is if the ball inside rattles when you shake the valve, then it is OK.

Not always from my experience. They’re very cheap to replace. Buy a new length of hose while your at it. Kim

 

[Oldmanmopar]

Go buy a new cap and use the gasket to double yours up. Crank case pressure is your problem, if that don't work then put and evac system on it