Advice on fan thermostat

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mojogoat
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Advice on fan thermostat

Postby mojogoat » Fri May 17, 2019 6:48 pm

Installing an electric radiator fan, any suggestions on the Fan thermostat 175-185, 185-200? I live on the coast so it takes forever to warm up

dorf
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Re: Advice on fan thermostat

Postby dorf » Fri May 17, 2019 7:48 pm

I used a 180 degree thermostat for a 350 cu inch GM

TEMP runs mid range...no over heat.....warms up quickly

Just my 2 cents....1981 LUV diesel...4WD

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JoeIsuzu
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Re: Advice on fan thermostat

Postby JoeIsuzu » Fri May 17, 2019 10:06 pm

I'm no expert here, but it seems pointless to have the electric fan coming on before the thermostat opens. The 185º fan thermostat makes more sense to me. I don't know what the "200" means. It can't be both. Does that mean it comes on somewhere in that range?

Jack

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Paul
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Re: Advice on fan thermostat

Postby Paul » Sat May 18, 2019 1:42 am

mojo - -

I have an electric cooling fan and I have a controller of my own design. It is set to come on low at 198 degrees and on high at 205 degrees. The thermostat is a 190 degree unit. I also have a switch to allow me to set both turn on temps to be lowered by 4 degrees. This is to allow me to anticipate long hard pulls (as in our Sierra mountains).

I agree with Jack. There is no point in turning on a cooling fan unless the thermostat is already pretty well open. Thermostats tend to open slowly, generally starting at the specified temperature and then getting fully open about 8 or 10 degrees hotter.

If your warmup is way too slow you likely have a leaking thermostat, i.e., one which is not closing completely. Doesn't take too much leakage to spoil the warm up, especially in a cold climate.

Paul
'84 P'UP 2 wd diesel, 5 spd with 0.78 fifth gear and differential back to 3.73.

mojogoat
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Re: Advice on fan thermostat

Postby mojogoat » Sat May 18, 2019 10:19 am

Turns on @ 200F off @185f
Any advice on where there is a place to screw it in, I couldn't find a place unless I install a tee.

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Halden
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Re: Advice on fan thermostat

Postby Halden » Sat May 18, 2019 2:27 pm

You can drill and tap a hole to whatever size the threads are on that sensor.
It's not pronounced "Ih-soo-zoo", it's pronounced "It-screws-you"
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