377

i have a 73 the temp guage is reading about 160ish the car has a 180 stat in the engine fan clutch locks and unlocks normal but the gauge reads cold the senser should be the problem ?but were do i get the right one for the car thanks

Hammerhead Fred

Might want to first verify the engine temp before tearing into calibration issues with your gauge. Gauge reading is dependent upon the sending unit and the gauge resistor.

0Willcox Corvette

I'd pull a ohms reading from the sender to verify it's working.. If it is working then I'd install this on the back of the gauge.

https://willcoxcorvette.com/corvette...resistor-68-76

Once you add this resistor to your dash unit you can then match calibrate the sender to the gauge. There is an installation video at that link above too.

Willcox

billschroeder5842

Is this reading "new" or have you done anything to get a different reading?

The gauges are not super calibrated and readings a bit off are common.

Has there been any recent changes to your cooling system?

377

no changes its bin off for a long time . i have time now to fix it the sending unit. the unit was changed when i did the heads.i dont want to go in the gauge cluster if i dont have to.nobody sell the right unit?

jnb5101

Do as suggested above. Test the sending unit by measuring the resistance from the stud on the sender to ground (engine block). There should be about 100 ohms difference between a cold and hot engine.

7T1vette

If the water temp is correct (low), I suspect that the thermostat in your car has failed in the OPEN position. With it all the way open all of the time, it would take a pretty long time for the engine to reach normal operating temps. (And if you have a better radiator than the stock unit, it may never get higher than 160F.)

377

THE STAT IS NEW i checked it and not open the rad is stock. i will do a ohm reading cold/hot thanks for ideas