Coolant & Oil Temp Sensors

[LannyL81]

Does anyone know what the resistance range is supposed to be for the coolant and oil temperature sensors?

I would like to check the calibration of the gauges....although calibration is a bit too "strong" of a term.

My coolant gauge reads just under the thick 200°F mark, right where it should for the installed thermostat.

But the oil temperature gauge seems to be quite low. I added this feature to my '81 a long time ago, so the parts were never "calibrated" at the factory...so I probably have the incorrect shunt resistor on the gauge. This is what I want to check-out as well as the coolant gauge scale.

Anyone??

 

[bill81vette]

Lanny,I seem to remember that just under the 200 mark is about where mine runs as well.
as for the oil temp,it does take a while for it to get to temp.
I can,if you like check the resistance on mine when I get it out next month.
(still winter here)ad

 

[LannyL81]

I was hoping that there were specs on the two sensors and what the resistance was for certain temps. I know that in another car I had the fuel gauge was 0 - 90 ohms. I did measure the coolant temp while the engine was running, but still warming-up and I got a reading of 325 ohms. I do not think I can get to the oil temp sensor from the top side without putting a wire on it first and then running the engine.

I did find the oil tmep sensor OEM part number 25036292, PS201...but have not been able to find any specs on it.

 

[bill81vette]

I will be happy to check mine..
it may be a couple of weeks before I get to it.

 

[Peer81]

Re: Coolant & Oil Temp Sensors

I go crazy on those gauges. What I did first check all the gauges with other mechanical gauges then change the resistors to best match the "real" temps. It still isnt perfect but good enough.

Greetings Peter

 

[LannyL81]

I did find that Wilcox Corvettes has a range for the coolant temp on their web site. I wrote it down and now unable to find it....:ugh

 

[bill81vette]

Lanny I'll pull mine out this weekend and I will check mine

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