[Vwdiesel] Direction of coolant flow in radiator

[Erik Lane]

as much as i respect your opinion, and i think that
you have much more experience in these things than i
do, but this time i think you're wrong.

if it were to pull from the top of the radiator then
as soon as the coolant level were a little bit low
then it would be sucking air. yes, it is a closed
system, but if it were taking from the top of the
radiator then the radiator would ALWAYS be full, until
the time when the engine were completely empty of
coolant. and the head of the engine would be the FIRST
thing to be lacking in coolant. not a good recipe for
an aluminium head.

i think that it would be VERY bad engineering to risk
the engine in that fashion. ALL of the diesels i have
worked on do not do that. if you look at the water
pump you can see that it pulls from the radiator and
pushes it into the engine block from there. tho i
guess you could be right on the other wasserboxers
cause i don't have first hand knowledge of them, but i
still really doubt it.

erik

--- LBaird119 at aol.com wrote:

> 
> > and i THINK every other car vw or not is the same.
> if
> > the water pump was trying to pull water from the
> top
> > of the radiator then if the water level were only
> a
> > little low then the pump would suck air and there
> goes
> > the engine overheating. so i HIGHLY doubt that any
> > engine is set up that way.
> > 
> 
>   Actually I think the rest of the VW's ARE the
> opposite.  They go in the 
> bottom and come out the top of the radiator.  Just
> feel the hoses as you 
> wait for the thermostat to open the bottom hose gets
> HOT all of a sudden 
> while the radiator is still cool.  It's a "closed"
> system so the air is 
> pushed 
> out the small hose into the reservoir and the rest
> goes into the head 
> from the top of the rad.
>      Loren
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