I would assume the reason behind marking it, is a potential balancing issue.

But....

This doesn't answer your question directly, but with a new pressure
plate, how does one line it up/balance it in the first place? I don't
think there's any marks on a new pressure plate, but even if there
were, what would you line them up with? If I'm right (I haven't bought
a new pressure plate in a LONG time) I would think there's no problem
putting it back on w/o any reference marks. Besides what choice do you
have? --- :^)

Here's a tutorial at the ever helpful Bens Place:

http://www.benplace.com/vw_clutch_job1.htm

Cheers,

Neil.

On 11/8/07, vanagonvw <ac.vanagon@gmail.com> wrote:
> 1981 Vanagon
>
> The engine sits on the bench, and I  have been reading the procedure for
> removing the pressure plate, and checking the clutch surface. They all
> say to mark the pressure plate and the flywheel to be able to relocate
> them the same way.
>
> What is the penalty for when an overly exuberant son pulls it off,
> without making the marks?
>
> Is it some kind of balancing issue? What to do now?
>
> Thanks,
>
> John
>

--
Neil Nicholson. 1981 Air Cooled Westfalia -
"Jaco"  (Bustorius)

http://web.mac.com/tubaneil