Engine cooling fan/water pump switch

[Flash]

Were can i find a 160*F coolant switch sensor. All i need is a switched (on/off) sensor. already have the relays. would be real inexpensive.

Here is what I'm tying to do.

I want my water pump to turn on (electric water pump) at 150-160* and my cooling fan to turn on around 180*F

The reason i want my water pump to turn on at this temp is that my new motor is not going to us a T-stat so the electric water pump will be a little bit more effective at moving water around.

I can buy a dual fan kit that would accomplish this for 150-200 dollars, but I'm cheap
I found a sensor that screws onto the block/manifold(coolant passage) from V.D.O. Part number 232-011-017-093D for a 167*f and 232-011-017078D 176*F.
Only problem is that i cant by just one!!!!! i have to buy a 150 of each number

what i would really like to find is a sensor that bolt to the intake "bolt" that turns on at 160 and a radiator probe type that activates around 180*F

Thanks

[86rocco]

If you know someone that writes computer code, it would a fairly simple matter to set up a $5.00 micro-controller to read a normal GM or Bosch engine coolant temperature sensor and switch relays on and off at your desired set points.

BTW, I don't know that this is the most appropriate solution to your dilemma, it's just that I've been working with micro-controllers a bit lately so that's were my head's at.

[Tony]

How about one of these Gordon ?

http://www.ebay.com/itm/Klixon-F150-2-F ... 1037755262

http://www.ebay.com/itm/Klixon-F160-2-0 ... 2a2ca737a9

They are available in a wide range of temperatures and are not expensive.

http://www.sensata.com/klixon/thermosta ... n-7bt2.htm

[Flash]

86rocco...........there is one guy in this town that might be able to to that kind of thing. but never can run into him when i need to.

Tony, that's a good idea. I replace on of them sucker on my home heater last winter. Not sure how it would work in the open air. could build a heat box, of sum sort, on the intake, but now sure how it would work on the radiator. Guess i could build a heat box on top of the radiator.........or for that matter i could tape it to the upper radiator hose for testing.
If it didn't work, i would only be out 5 bucks

Thanks guys, got me thinking in new directions!

[Tony]

You don't need a heat box.
Just bolt it straight down onto a flat surface, and the temperature of that surface (not the surrounding air) is what it senses.
Pretty easy to fit it onto the cylinder head or onto the thermostat housing.
Bolt it onto a small (but thick) aluminium plate, then attatch that aluminium plate to the radiator top header tank, thermostat housing, or whatever part of the engine you want to sense the temperature.

Its not ideal, but its easy and cheeep.
The contacts should handle around ten amps for a while, but a fan relay would be much more switch contact friendly.

Anything electronic is going to cost more just for the parts.
It will be a lot more fragile, then you are going to have to build it well enough so it does not keep on failing.
And that is not so easy to do.

[Flash]

I bought 2 of these adj switch last night.

http://www.ebay.com/itm/110993972217?_t ... EBIDX%3AIT

Will see see how it works.

Got my motor running last night. No funny noise and sounded pretty good after i gave my distributor a good twist of advance.

[Malvin]

Flash
What you bought should work

But just in case this will work I have used this before .

http://www.ebay.com/itm/Fan-Control-The ... RTM1562569