Hi Peter,
Most likely, the westy rotating mechanism under the seat has
too much play. I had the same quirk on my westy.
To fix it, you have to remove the seat as in Bentley p.72.2.
Then you tighten the 4 self-locking nuts on the round dish
that you will see. Don't tighten them too much or the seat
won't rotate anymore when camping. The trick is to find just
the right tension, so that the seat won't jiggle, but still rotates
easily. Let us know if that works.
Harald
'90 westy

Peter wrote:
> The drivers seat on my 87 westy has the disturbing habit of rotating
> slightly on turns or when lateral pressure is applied to the seat
cushion.
> The seat moves back and forth easily and in all other respects the seat
> works fine.  Neither myself or my mechanic was able to detect any obvious
> abnormalities in the railings under the seat except to notice that unlike
> other VW models the westy does not appear to have a plastic shim within
the
> railing which slides with the seat.  The Bentley manual does not seem to
> cover this problem.  Any thoughts?  I guess I'm going to need to take the
> seat out entirely and see if the railings have een bent out of shape.