I've been there and done that with the front blower motor replacement,
and the thought of lubricating the motor without removing the dash is
impossible.  It is sealed up and really impossible to get at without
removing the dash.  You might be able to partially remove the dash and
attempt to lube the motor, but really once you are half way through the
job, you might as well go for it all.  It really isn't one of my
:dreaded" memories as Vanagon jobs go.  It might be possible to rig
something up once you get in there and replace the motor, so that you
can lube the motor every year and stave off the second front blower
motor replacement 10 years or so from now. ??

Dan Erlandson
Flemington, NJ
1991 Vanagon GL 180k
1999 Passat 1.8L 120k