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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