James
first you say valve adjustment then valve job
I will address both
When I build a type 2 engine I use new valve covers and clips because the
old one tend to not get the job done even with new gaskets. so if the covers
where removed to adjust the valve then they could be leaking due to age or
misalignment on the head.  The location of the leak if its the valve cover
should be easy see if you wipe down the covers and let the engine run
If a valve job was done then the shop remmoved the tubes and yes the seals
could be leaking but these would not have been touched with a valve
adjustment. The other thing that leaks oil on the type 2 heads is the inner
head stud openings when I install a head on my rebuilt engines I use
silicone on the inner head washers to seal the 4 openings
good luck
Bob
----- Original Message -----
From: "James Juniper" <jamesandjennifer@NT.SYMPATICO.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, July 04, 2004 9:26 AM
Subject: Oil Leak Over Heater Box

Hello,
I Just got my 81 Vanagon back from the shop where I asked them to do a valve
adjustment. They did and it runs fine but I found today that oil is dripping
from somewhere over the right (if your looking at the back of the van)
heater box. Over night this added up to a spot the size of a pie plate. Is
this likely the valve cover gasket? Or those push rod tubes that seem to go
all the time? I'm going to take it back Monday of course, but want some
leverage if them tell me it was nothing to do with the valve job. Any advice
from the pros?
Thanks,
James in Yellowknife