Rob, I have same problem/symptoms. I changed the water
pump+thermostat, radiator, thermoswitch(fan switch)
and my fan NEVER comes on. I tested fan/switch and
they work fine. Radiator does not get hot enough, it
averages 140-160F when it should be around 188F. I
want to put in an 80F thermostat like you did, know
where I can get one?

Ive heard rumor that VW sirrocco racers install a
lower temp thermoswitch but I cant find any.

Phil***84' Westy Tiico "Millenium Falcon"
***60' Morris Mini1340CC(For sale)

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Its a Mystery
--- "Spooner, Robert E."
<bob.spooner@MIDDLETOWNPOWER.COM> wrote:
> All,
> In my attempt to determine the cause of a
> hot-running TIICo transplant, I find the cooling
> system in fine shape except for 2 things:
>
> The fan switch isn't turning the fan on when it
> should - there is no "low" speed.
> There was no thermostat installed.
>
> I replaced the switch.  I put in a 80 degree
> thermostat.  I don't have a good test on it yet.
>
> Would a missing thermostat cause the engine to run
> hotter than it should?   I'm think that maybe the
> coolant is passing through the radiator too fast,
> and not giving up enough heat as it zips through
> there.  Am I off in left field?
>
> I will see how these two items (hopefully) improve
> the cooling situation.  I will then put in a quart
> of super-duper water wetter.  I will see how that
> works.  Lastly, I'm going to add an external oil
> cooler.
>
> Bob
> East Haddam, CT

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