dan, sorry i was so hasty to respond with criticizm..
 but reading your post, it appears that you are not a mechanically inclined
individual.. nothing wrong with that, im not an expert engine builder either
but..i can say Bob is.. he does this for a living..

its common knowlege that if the alternator belt breaks, then you will
overheat the motor.  this should be hammered into newbie vanagon owners heads before
they even buy a vanagon..  i know i always explain to new vanagon owners not
to ignore the idiot lights.. they are there for a reason.

but Bon cannot be accountable for damage to the motor from you ignoring
warning signs like idiot lights and ignoring his break-in periods for a new motor..

as for the oil drain plug leak, that is simple.  just install a bigger or
wider copper crush washer, or a slightly bigger drain bolt.  the case drain hole
may have been helicoiled at one point and the the hole enlarged slightly..
easy fix.

anyway,  i have heard plenty of people blowing their motors because they
ignored warning signs..
but Bob isnt responsible for driver error.

take care

chris