Kirk,

I just did that to replace a mirror that someone broke for no reason.
Had another with a snapped off adjustment nut and bolt.

I just inserted various paint scraping tools, screw drivers and the like
into the crack and gradually pried the plastic ring that holds the
mirror in place away from the base.  It was easier on the one with the
broken mirror.   I took my time so as to not crack the plastic and did
it inside so everything was warm and not brittle.  The parts on both
mirrors appeared to have been glued and I was essentially breaking that
bond.  But it worked and I just glued it back together with the new
mirror with model airplane glue.  It didn't make quite as neat a seal as
the original, but it works and I have one good mirror from what was two
defective mirrors.

Hope this helps.

Sam

--
Sam Walters
Baltimore, MD

89 Syncro GL
85 Westy Weekender
84 Vanagon, original owner, soon to be retired, just too many problems

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