'73 145 b20f-

Temperature gauge is reading really low. I want to test the temperature sensor resistance to know water temperature (you know, by placing it in boiling water and measuring the resistance). Anybody have the resistance of the sensor at 212*F?

Paul

BTW-will a B21F temperature sensor work in a B20F?

Is your gas gauge also reading low? More likely the voltage compensator than the sensor.
SWEM (or possibly another site) has directions for making a solid state regulator
that works great.
--
George Downs, Bartlesville, Heart of the USA!

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.

212°F = 60 ohms.

--
Three 164's, Two 144's, One 142 & a partridge in a pear tree.

Hello,

140 and 1800E/ES used different temperature sensors for the gauges.

140 have VDO gauges and 1800E/ES use Smiths gauges.

They also use different voltage stabilizers.
--
Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502