Matt wrote:
>> I found many writeups on how to bleed/burp the
cooling system, but...
How do you purge all the antifreeze?

You don't. There are simply so many nooks and crannies
in the cooling system that unless you are able to pick
the van up and shake it, you will always leave some
coolant lurking somewhere.

Essentially, the idea is simply to repeatedly drain
and fill with fresh (or distilled) water, until you
are sure it is nearly 100% clean. (Probably a good
opportunity to use a Gunk-type flusher/cleaner product
first.) Drain one final time, which will remove about
half the total capacity, then add enough UNDILUTED
coolant to top up the system, which should get you
pretty darn near the desired 50:50 mix ratio.

If you haven't already done so, I suggest you sign-up
at Westfalia.org. There, in addition to lots of other
good info, you will find a very complete description
of the coolant flushing and bleeding process:
http://westfalia.org/eve/ubb.x/a/tpc/f/87160555/m/3416031121

Good Luck!

Jeffrey Earl
1983 diesel Westfalia "Vanasazi"
http://www.vanthology.com/

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