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Post Info TOPIC: Temp switch inside water neck housing (above t-stat)
Ben


- RAMBO -Mill Creek, WASite Administrator

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Temp switch inside water neck housing (above t-stat)
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My water neck has a factory port on the top of it (above the t-stat) i was planning to use for the fan controlling switch... But my little cooling fiasco a couple months ago got me thinking, that side of the t-stat does not always have water on it? or does it. Would that be an accurate place to put the switch or do i need to figure something else out.

My heads do not have a provision for a temp sending unit port, so my temp guage is using the(only) port in the intake manifold. 

I know they make plates that go under the t-stat for additional temp senders- i may have to get one of those if you guys think its a bad idea running the sender on the outside of the t-stat.

 

thanks for your input

Ben

 



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Ben R.

1968 Chevelle 300 - 454 / 4spd




- wondah whooooaman-
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I just wired mine with a toggle switch but I don't drive mine on the street.  I wanted to be able to fully control the fan



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Mark
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- Beemer Brett - Redmond, WA

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I've run a fan temp switch from there before on my old 327 with no issues.  That is usually below the level of the coolant in the radiator.  If you pulled the hose off I bet coolant would come gushing out. Doesn't need to work until everything is hot anyway.  Once stat is open and water flowing, it will do its job. 

 



-- Edited by Brettd85 on Monday 26th of March 2018 07:25:14 PM

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Ben


- RAMBO -Mill Creek, WASite Administrator

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Brettd85 wrote:

I've run a fan temp switch from there before on my old 327 with no issues.  That is usually below the level of the coolant in the radiator.  If you pulled the hose off I bet coolant would come gushing out. Doesn't need to work until everything is hot anyway.  Once stat is open and water flowing, it will do its job. 

 



-- Edited by Brettd85 on Monday 26th of March 2018 07:25:14 PM


 Thanks Brett- I figured i'd give it a shot first anyway. Glad to hear someone else did it and it worked.

 

Mark i'm planning on running the 2nd fan off a manual switch inside the car- but the primary fan I want to be automatic. I bought an adjustable controller last year, but didn't have the right fitting when i was getting the motor running so i never returned to the project until now.

 

 



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Ben R.

1968 Chevelle 300 - 454 / 4spd




- Mike -
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I’ve only had two cars with electric fans, but both had the switch sender in the radiator since you want them to cycle with the water in the radiator vs the water in the engine. If that makes sense?

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- Durand -

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If the fan switch temperature is a higher temperature than the t-stat, it doesn't matter where on the engine you put it, provided it is in the coolant flow.
Either way of sensing temperature is fine.
Radiator sensors for fan control tend to need a lower operating temperature over engine sensors.


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