Groves will be cut into the new arms when you install them for the first
time.

The shafts need to be cleaned out of the "old" soft metal from the old arms
before you install the new arms.  Just use a small nail and clean each
grove.

When you clamp down the new arm, make sure it is in the correct position and
use a good 10mm 6 sided socket.

Re-Torque after a week or so of use.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
John Rodgers
Sent: Sunday, September 19, 2010 6:16 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Wiper Arm Knurling - How does it work?

  I recently acquired a pair of replacement wiper arms with the airfoil
on them to replace the ones I have with no airfoil.  When readying to
install them, I discovered there is no knurling on the inside of the new
wiper arms where the knurled wiper shaft goes through,  as there is in
the ones I took off. In the replacements, it appears they have corroded
away, been worn off by abuse(nut not tight) or simply were never there.
In any case, without the knurling, it would appear that slipping would
be an ongoing problem. Anyone have any ideas as to how to address this
issue?

Thanks,

John

--
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com