Why do you think you "have" to change it? Coolant can also be tested for
condition and additive effectiveness.
What type do you plan to use? Why?
And there should be no need for weird fill or bleed methods. The main trick
is to fill-bleed with engine cold.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
JRodgers
Sent: Thursday, November 29, 2012 8:37 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Libby Bong and coolant change

Have to change the coolant in both of my '88GL's. Have decided to make a
"Libby Bong" for the task - but - I have found most of the recommended
dimensions for the bong - the one that eludes me is  how long or tall to
make it. I know instructions say tall enough to be over the height of the
radiator vent - but just how tall/long/high is that? Does anyone know??

Bong PVC pipe - 2in. dia by "X"in long?

Other parts --
Plumbqwik Reducer - 2 in down ti 1-1/2 in.
Nylon tube - 1/2 dia X  "X" in. long
Rubber band
Sticky/pucky to seal nylon tube to te PVC pipe.

Thanks,

John Rodgers