Leaking Oil Filler

[Zylinderkopf]

what is causing my oil filler to leak? It is dripping onto the manifold - I checked the oil filler cap - rubber gasket is still plyable and it seems to close properly. I have the stock oil bath air filter.

I doubt the picture provides any clues, but here it is (and before you comment - I did have the hose and the cap on it!)

[Ron Domeck]

Nut inside holding it on not tight or a rust hole at the bottom were water would lay.

[Zylinderkopf]

Ron - thanks for the reply. I didn't know there was a nut inside that filler...can't see one. Been reading about "blow by" on the samba. Excessive crankcase pressure?

[Wildthings]

There is a big hollow nut that holds the filler to the tower, it takes a special tool to loosen and tighten. There is also a gasket between the filler and tower that dies with age.

Yes too much crankcase pressure will cause leaks.

[Zylinderkopf]

thanks Wildthings. I ordered one from jbugs. Here is a picture of the oil filler removal tool - for anyone needing the info in the future.

[NY thing]

Mine does the same thing sometimes. I THINK my filler has a whole in the underside. It does it when I pour oil in it too fast too.

[citroen]

look on the bottom if your oil fillerif it looks like this this is your leak you can even see where someone tried to weld this one up those are holes caused by the water in the oil

[OVLWNDO]

FYI you can use an internal pipe wrench to R&R the oil filler securing nut.
You can pick these up at just about any hardware store.