Hi guys/gals, I have a pretty random and simple question regarding the oil fill cap. I removed the oil fill neck when I installed the motor into the truck and screwed the cap into the valve cover. Didn't think much of it for over a year now but noticed what looks like some oil residue leaking out from under the cap and down toward the valley cover.

Looking at it further I am able to lift one side of the cap up a bit in the bore as if it is not completely tight to the valve cover. I am not as concerned about the oil leaking out because it is minimal but more worried about the PCV system pulling a vacuum through the leak.

Have any of yall had this issue with the cap screwed strait into the valve cover? Is there a different cap that fits better or is more snug in the valve cover?

Thanks for the help guys/gals!!

 

I remove the fill neck on all of my trucks and never had that issue.