One way to do this...
- loosening the pin enough so it can move, but no to much.
- one person stays inside with a thin Sharpie marker
- from outside another closes the sliding and pushes the left (or the back)
of the door till it's flush with the body.
- the person inside lifts the piece of rubber (if there's one) and traces
the contour of the pin with the marker.
- open the door, reposition the pin according to the tracing of the pin,
tighten it.
(note: yes .. the locking mechanism could be worn, or the pin is worn too
ot the pin can move by itself a bit.)

On Sun, Feb 12, 2023 at 8:03 AM John Lauterbach <john@jhl.mgacoxmail.com>
wrote:

> My '91 Subie Vanagon continues to provide almost flawless performance on
> my weekly
> round trips from my FL home to my GA home back.  On my most recent trip
> back from GA,
> the latch on the rear of the sliding door came off the locking pin.  The
> door did not
> open while I was driving, but the rear end of the door had moved out from
> the body.
>  I had this problem some years back, but I had a body shop take care of
> the problem
> when the shop installed the GoWesty plate steel bumpers.
>
> It looks like the locking pin has moved down and to the outside with
> respect to the
> correct position by about 1/16 of an inch.  I loosened the pin with a 15
> mm open end
> wrench, and moved it back to what appeared to be the previous position,
> and re-
> tightened the pin.  I have not driven the van enough to make sure I have
> pin in right
> position.
>
> What is correct method for making sure the locking pin is positioned
> correctly.
>
> Thank you,
>
> John
>