so i was redoing my efan setup and had a question.

so some of the fcs came with a stock electric fan and a 1 prong spade thermoswitch in the filler neck.

has anyone used this thermoswitch to trigger an aftermarket efan with a relay?
also what tempurature does this sensor trigger at?

i was looking and belive it might be between 92-97C but wasnt positive.

 

yes you can but its a terrible idea. that switch operates backwards so you would need 2 relays one to trigger the fan and one to switch the sensors readings.
A better idea is to use a switch from a 1988 mitsubishi sigma. there are 2 you need the one with the oring it activates at 194 and deactivates at 185. autozone/ wells part number sw611
you can visit wells e catalog here
http://www.wellsve.com/custom_search...hp?showall=yes
the stock sensor thread is a m16 1.5
You need it to be a deep sensor for that location as well 1.5 to 2 inch in length.
it must be normally open and closed when the temp is reached.
like I said the sigma is the best candidate for this purpose. But you can make your own temp choices with that catalog. All those part numbers are stock part numbers at autozone.

 

Are you serious?!....there was a whole thread on exactly that topic...a few pages too....now it seems to have disappeared ???

+1 to the advice above.
The S5 switch operates in the way described by Dreyko and only requires one relay.
I looked through numerous catalogs and ended up finding a subaru switch that comes on at 194* and off at 185* and fits in the stock location. One thing to remember with single pole switches is that they use the body of the switch to ground, so you CANNOT use teflon tape to help protect against leaks or it will affect the reading of the switch.

 

hes right. a good practice that im using is to mount a male spade terminal with a rind terminal on it to a slightly hiddne bolt so if the switch ever fails you can force ground the circut therby running the fan constant. these switches dont fail often but im a stickler for safety systems.
interesting about that subaru switch. is it a male spade teminal or does it use a connector? the mitsubishi was the only m16 1.5 I found in male spade that had a trigger before 200 and off before 180 as to not fight the thermostat.

 

thank you for the information, looks like ill be experimetning with the sw611
switch that has pretty reasonable temperatures.

hmm at autozone they want 60 dollars! goodness, i searched for that part at schucks/orielys

and found one for 10 dollars, not sure if its exactly the same part, it fits the galant sigma, but also shows it works in the rx7 ( though the rx7 uses a reverse switch)... guess i can buy it and see how it works

 

the cheap one is not right. there are 3 sensor on the galant sigma. it has a 10 dollar switch for temperature gauge. a 20 dollar switch for the high speed fans (220 degrees) and then the $60 switch for the low speed function.
Advance and oreilly dont carry the low speed one to my understanding.
Its expensive but it actually works properly. Ive had no issues.

 

Here is the thread I made which explains ways to wire up OEM (Mazda or other cars) thermoswitches to control an efan:

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/how-control-electric-fan-factory-thermoswitch-886862/

 

^^^ bingo!

The subaru switch is a single male post connector. I was told I got 2 of the last 3 in the country when I got them@ napa a couple months ago. I'm pretty sure the switch is the same, they just used a diff manufacturer now.

 

 

lol that switch is massive.
heres mine
http://www.wellsve.com/custom_search...p?partno=SW611

 

i used a fan switch from the radiator of a starion.