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Temperature sensor resistance 140-160 1973

posted by  malloy1 on  Mon Dec 28 07:22 CST 2009
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last visit: Sun Oct 12 17:44 CST 2014
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The sensor I had in it was from a '70 1800 B20. Seems like the resistance is different between the '70 and the '73 sensors.

FCP states that the '73-on temperature sensors are the same. I had a 240 sensor laying around, so I threw it in and seems to work fine on the B20.

Paul

BTW- I tested the 240 one I have in boiling water (at an altitude of 5280 ft - Denver [should be around 195*F]) and got 120 ohms, then checked the 140 temperature gauge using some resistors. 67 ohm resistor showed about 3/4 hot (just below the orange on the gauge), 135 ohm resistor showed about 1/3 hot on the gauge.

So I threw in the 240 temp sensor in 140 car and got the car warmed up. The sensor read about 170 ohms (wire not attached) and the temperature gauge was reading 1/3 hot (wire attached).

The '70 B20 temperature sensor that was on the car must be the wrong sensor. It reads in the 2.4K ohm range in boiling water.





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