Do you have mud daubers in your neck of the woods?  We have plenty in
Florida.  Any open line or bolt hole is quickly filled.
I would undo the lines and flush with AC flush or isopropyl alcohol.
Replace the o-rings in the lines and Schrader valves on the fill ports.
If you don't flush at least blow air through them.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael McSwain
Sent: Thursday, July 02, 2015 10:50 PM
To: vanagon@GERRY.VANAGON.COM
Subject: A/C Flush?

I'm a few short steps away from reviving my Behr A/C system in my van.
It's one of the ones mounted in the dash. When I bought the van there was
no compressor and the hoses at that end were not sealed up in any way. I
was about to take a stab at flushing the lines out this afternoon, but
thought it better to do a bit more research. Is it necessary to flush the
system at all? I would love to just vacuum and charge.  If so, would I need
to avoid flushing the expansion valve, my new dryer or any other parts?

Any advice would be welcome.

--
m.