Mark,
     So this brings up an interesting question.
Which speeds in the two speed matches which two of the
three speed in the tree speed and why?
What you says explains why my engine temperature drops
when I tunr on the AC.    Maybe it is time to consider
a radiator flush.   regards gary
--- mark drillock <drillock@earthlink.net> wrote:
> Gary, only 2.1 models with A/C have 3 speed fans.
> Speed 2 is controlled
> only by the A/C controls and has nothing to do with
> how hot the engine
> or radiator are. The dual temp switch in the
> radiator runs speeds 1 + 3
> according to how hot the radiator is. The A/C relay
> controls speed 2.
>
> The overall cooling system has plenty of capacity
> for the 2.1. Many
> people run much more powerful engines in Vanagons
> without cooling system
> limitations presenting themselves.
>
>
> Mark
>
>
> gary hradek wrote:
> >
> > David,
> >      My disconnect is more obvious.   Sometimes it
> > will run 10 or 15 minutes in the hotter area with
> only
> > the low speed fan running.   Othertimes the medium
> > speed fan will be running when the temp gauge
> > indicates that it should be off.   I think it is
> just
> > a poorly designed system that works marginally.
> I
> > think the actual coolant flow maybe variable and
> is
> > the cause of the problem.   This is a tuff thing
> to
> > measure but it would explain the temperature
> > variations with a constant engine speed.
> >

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