Not sure how difficult removing the glow plugs
is on this engine, but it would accomplish a no
start condition and save wear on the starter by
allowing the engine to turn over easily. I am
inclined to say this is not necessary since
the engine was not just rebuilt..therefore
it still has oil in the critical spots. Preoiling
is necessary after a rebuild when the old oil
has been cleaned off. However, It might take
a while for the pump itself to prime itself and
start pumping oil. To be safe take the glow plugs
out and run the starter in 10 second intervals until
adequate pressure is attained. Perhaps before
you get around to this someone else will offer
convincing reassurance that it is not necessary.