Originally posted by elbatrop1
Hey guys,

I have a 1978 T-Bird, with a 351 Windsor.

My question is: What would cause oil to overflow out of my vented oil cap? It doesnt fly out of the cap, but I can see that some oil got onto the valve cover.

Hopefully this is enough info. Thanks a lot for your help!
Could have a blown gasket. Could have excessive blow by. Could be as simple as needing a new PCV valve.