Best procedure is to remove the CV.
Check the bearing cage inside the CV assembly.
Check the races and drive balls for damage.
Clean everything and reassemble it if it still looks good.
You can make up grease guns for semi annual greasing.

Stan Wilder
www.engineceramics.com

----- Original Message -----
From: "Spencer Allen" <SPENCERVW@AOL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, August 12, 2004 9:08 PM
Subject: bad cv knocks going straight?

> This past weekend my 85 Westy developed a heavy knock at the r/r wheel. I
> suspect a bad CV. The knock slows and speeds according to the bus speed.
It
> knocks when going straight I thought CVs knock only on turning. Turning
actually
> quiets it down. Can these things be saved? Can (or should) you add grease
> through the boot from time to time? If it is bad is it cheaper and faster
to replace
> the half shaft? Thanks all.
> Spencer