[Vwdiesel] 1984 Rabbit Diesel- taming the hothead

[Shawn Wright]

I believe the original two speed setups should have a 3 conductor temp
switch in the rad, with a high and low temp at which the switch will turn the
fan on in high and low. Neither of mine have the two speed fan, but when I
replaced the rad switch, I was asked if it was 2 speed or not...

I see there are two 2-speed fans listed for the TD at altrom.ca: one with
A/C and one without, but they both appear to be 2 speed:

200/120W Without A/C  	165 959 455 T
350/250W With A/C  	0 130 109 238

Here we are:

Thermo Fan Switch 	92/98 DEGREE TO 88,3 CON.  321 959 481 D
Thermo Fan Switch 	85/93 DEGREE TO 88,3 CON.  321 959 481 M
Thermo Fan Switch 	89 UP 2 CONNECTOR  	321 959 481 E

I knew about the different switches, but not the different 2 speed fans. By
the ratings, the bigger one must be a lot more powerful.

On 7 Jul 2003 at 6:38, Nate Wall <natewall1 at yahoo.com> wrote:

> Question:
>
> On the two-speed cooling fan systems (I think its A/C
> specific, and perhaps TD specific too, correct?) AFter
> the fan comes "on" on low speed, if the engine still
> gets hotter (like climing a grade), will the fan turn
> on "High Speed" at some point? Just curious. Mine
> never seemed to get hot enough to do this. The fan
> definitely cycles between "High " and "Low" with the
> A/C on, though, but this because of a pressure switch
> in the "High" side line on the A/C system to cool the
> condensor and certain R-12 pressures.
>
> --Nate
> --- Scott Kair <scott3491 at insightbb.com> wrote:
> > Hagar,
> >     Just caught this in re-reading your message:
> >
> >     >>Scott .    Q:  did fan work     A:   did not
> > notice.       checked it
> > in driveway , it is a two speed    used jumper on
> > radiator plug -- a-ok both
> > speeds. Then let it idle   when temp reached red fan
> > started.  Lab
> > thermometer in expansion tank showed 200 F.<<
> >
> >     Something is amiss, either with your
> > thermosensor or your dash gauge.
> > While I've never used a lab thermometer to check
> > when the fan should kick
> > on, every VWD I've ever had turned on the fan at
> > around the 3/4 mark.  And
> > 200F sounds a bit low for it to be the red zone,
> > although a good point for
> > the fan to kick on.
> >     Maybe some of the other guys would have more
> > experience in that area, as
> > overheating is definitely a critical issue.
> >     Scott Kair
> >
> >
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>
>
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--
Shawn Wright
http://Zuiko.sls.bc.ca/swright
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