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Discussion Starter #1
Does anybody know what the resistance value of the temperature transmitter should be when the engine is cold and when its at normal operating temperature?.

My gauge only climbs about 25% up the scale, though the engine is getting upto normal operating temp (from all the evidence I have including that the system is pressurising normally). I'll borrrow one of those neat point and shoot temperature measurment gadgets to check just to be sure.
However
I checked my sender this evening when the engine was warm. It read about 215 Ohms.
If I ground the lead to the sender, my gauge goes over full scale (as I expect). My only comment is that 200 Ohms (ish) sounds about right. Could the gauge itself have a fault (hope not), or should the sender have a lower resistance?

Cheers... Rob.
 

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Discussion Starter #2
Ok

Just to add a little more info. I checked the temperature of the thermostat housing with a calibrated point and shoot thermometer. The reading was 82 C. Seems to be about right to me.

Any opinions?

Cheers... Rob.
 
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