> Would anybody know the function of a 6mm Hex/Allen
> Bolt at the bottom of the crankcase located in front
> of the Oil Drain Plug?
> I haven't touched it ... yet...!
>
> You may view a picture at
> http://www.esu.edu/~gstylia/vw/BoltUnknown.jpg
>
> It is the red arrow'd one.
> It looks like ETKA's part number is N-014-739-1, and
> description "Bolt, with Hex. Socket Hd. - M8x16).

look back at the etka at part number 38 on that frame (oil pipe,
025-101-149B).
it's the oil pickup for the oil pump, i believe. and notice that it's
off to the side, on one-half of the case. so you're supposed to put it
in and tighten your mystery bolt to secure it BEFORE the two case
halves are bolted together.

in the bentley book, look on the bottom right corner of page 13.50 ...
they show the "oil suction line with filter screen, replacing". and
there's your mystery bolt right down in the bottom of the picture (pic
# 13-638).

so, DON'T loosen it, whatever you do!! :)

good luck!
joel