The extension tube was missing from my '86.  It is possible to just pull
the thing completely out and a PO might have done that for you.  I found
one on an 85 and put it in.  I like it.  it has a flange that is pinched
between the cap and the threads which it threads onto.  So if you see no
flange here, yours is probably gone.
Edward

At 04:59 PM 5/13/2005, you wrote:
>RE: 1985 Vanagon, 4-spd, gas, 1/2 camper
>
>What's this about an "oil tube extension"...I've looked at it many times....
>     -Help me identify it....could mine have been "altered" and no longer
> exist?
>     -Proper use...I've turned it every-which-away....no luck?
>
>What gives....
>
>L