[Vwdiesel] smoking audi diagnosis

[Chris Jude]

stopped by a mechanics shop I've worked with before and was asking his
opinion about the Audi (1980 5000S).  It's been blowing bad  white smoke at
startup since I rebuilt the head about a month ago.
I noticed on the drive to work today that the car doesn't seem to smoke much
at all when being driven, and even when i got to work, at idle it didn't
smoke.  Then at lunch the car took about 10 seconds of cranking to start,
then blew white/grey smoke for about a block or two.  The same thing
happened at the end of the day.
I told him I wanted to do a valve adjustment on it, and the car had a recent
head rebuild job, and new injectors.  His first thought was that there could
be oil leaking into a cylinder, an injector could be leaking fuel, or that
maybe a valve was just too tight.  But he didn't seem to think a valve
adjustment would solve the problem.
I'm still going to go for the valve adjustment as soon as I can, but it
worries me to think that oil might be leaking past the gasket.  Oil
consumption hasn't seemed to be a problem, but the car can sometimes have an
acrid smell, even when burning biodiesel.
I didn't really understand  the leaky injector idea. But, i'm not sure who
'remanufactured'  the Bosch injectors i got off eBay.  They looked to be in
good condition, but I didn't test  them before installing...
anyone have any opinions?

chris
seattle