Ah, now I see, that makes a lot of sense, similar to bleeding brakes!
A tempting thought was also to have a permanent raised refill reservoir,
just concerned that consistent pressure could cause coolant to squeeze into
the motor where it doesn't belong!

On Thu, Apr 22, 2010 at 7:24 PM, Alistair Bell <albell@shaw.ca> wrote:

> try the "libby bong" method of coolant purging
>
>
> http://www.thesamba.com/vw/forum/viewtopic.php?t=234192&highlight=libby+bong
>
>
> alistair
> '86 syncro 7  passenger
>
> '82 westy, diesel converted to gas in '94
>
> http://www.members.shaw.ca/albell/
>
> http://shufti.wordpress.com
>
> On 22-Apr-10, at 7:14 PM, Tobias Gogolin wrote:
>
> I suppose the most important purge point on my '84 is the one in front on
> top of the radiator (are there others?). I would have to get a hose nipple
> with 90 degrees that fits there or cut back the bracket thats obstructing
> above the screw!
> I don't know, would be interesting to measure the pressure in the cooling
> system!
> Maybe a simple over pressure relieve valve could purge but that would be
> when its already overheating, and then its not going to have enough water to
> work properly either. So maybe better would be some kind of flotation valve
> that purges if there is no liquid?
> To simply run a hose back to the tail may result in the same problem that
> I'm trying to solve which is if water gets into that hose it will probably
> air lock!
>
> Today I did another short test drive after purging at a nose down slope and
> I still have the same problem that had already disappeared in test drives
> last week, what i'm talking about is that a few seconds after starting the
> van the light begins to flash in the instrument rises quickly to max.! I
> wonder what this is now! Maybe the oil in the coolant is making the level
> sensor think, lack of water? Since no water gets into the oil (yet) i'm
> still putting of that costly repair of those head gaskets that Scott kindly
> has explained about!
>
> And yes I love my Vanagon, its suspension is great and its a very
> comfortable car! Just cant wait to convert it to electric power! Lord let it
> rain $$$ !
>
>
>
>

--
Tobias Gogolin
Tel. Movistar (646) 124 32 82
Tel. Telcel (646) 160 58 99
skype: moontogo
messenger: usertogo@hotmail.com

Blog: http://zeitgeistensenada.blogspot.com/

You develop Sustainable Ranch Technology at
http://tech.groups.yahoo.com/group/SURA-TECH
an Open Source Electric Motor/Alternator at
http://groups.yahoo.com/group/Performance_Axial_Flux
and an Open Source Motor Controller at http://groups.yahoo.com/group/GoBox