timing belt/front pully

[Anthony Attard <ACA@NRC.GOV>]

Good morning Audi Guru(s).

When replacing the timing belt on the Audi, why is necessary to remove the center bolt of the
pully, if you are not intending to replace the oil seal??  Since the pully is in two parts, that is
the actual pully part is bolted to the center part, held by the big bolt, would it not be sufficient
to just take the 6 bolts holding the pully (the belt carrier) off in order to be able to take the
cover off as well as the  timing belt???.    Is this possible???

Thanks a lot.---------Tony.