What’s a quick test for temp sending unit?

[corvette8n]

What’s a quick test for temp sending unit?

I pulled a single screw temperature sending unit from a junk head, it’s stamped KS on the side. What’s the easiest way to test it? If it’s good I’ll put it in my spare parts stash.

 

[HD]

Re: What’s a quick test for temp sending unit?

read an old Motors manual, these are King Seeley units, it tells how to test them, step by step

 

[19Fordy]

Re: What’s a quick test for temp sending unit?

corvette: Peruse these threads.

Plus, I read a thread on fordbarn a while back on someone who actually figured out a way to repair these units on his own.

https://www.fordbarn.com/forum/search.php?searchid=18281647

Also, read through these threads.
https://www.fordbarn.com/forum/search.php?searchid=18281764

 

[tubman]

Re: What’s a quick test for temp sending unit?

I fixed one a while back. Look at this thread : https://www.fordbarn.com/forum/showthread.php?t=226078.

 

[drolston]

Re: What’s a quick test for temp sending unit?

I pulled a single screw temperature sending unit from a junk head, it’s stamped KS on the side. What’s the easiest way to test it? If it’s good I’ll put it in my spare parts stash.

Swap it into a car with a working gauge and see if it registers the same as the working sender.

Can be done without losing more than a few tablespoons of coolant as you swap senders.

 

[corvette8n]

Re: What’s a quick test for temp sending unit?

All good suggestions, I do have a 1953 Motors repair manual. Thanks

 

[Jersey Devil]

Re: What’s a quick test for temp sending unit?

One way to test is with an Ohm meter. The reading between the screw and the the body of the sender unit is in the area of 12-14 ohms. Readings in this range usually indicate a good sender unit.

Hope this helps,

Tom

 

[JSeery]

Re: What’s a quick test for temp sending unit?

One way to test is with an Ohm meter. The reading between the screw and the the body of the sender unit is in the area of 12-14 ohms. Readings in this range usually indicate a good sender unit.

Hope this helps,

Tom

Not sure what that would check other than the calibration resistance. Guess it would also tell you the points were closed. The issues if not working is normally the points needing cleaned. Tubmans thread covers that.

 

[rotorwrench]

Re: What’s a quick test for temp sending unit?

I use a hot plate with a pan of turbine oil to heat the sender unit. (turbine oil won't burn and it won't boil at 230 degrees but water will get you in the ball park). Some jumper leads and an old Ford/KS gauge that I know still works along with a 6-volt power source will do the job. I use an infrared thermometer to check the temps. A person can do it right next to the car if they have long enough jumper leads.