Is there a normal operating temperature for a 1HZ motor in a 1995 troopy?

No idea but where on the firewall did you run the wire ? I am thinking of getting a TM2 . Where did you put the sensor ?

Hi Boo Boo,
Where have you mounted the thermocouple? On my Hilux with the 5L diesel motor and the thermocouple under the bolt of the thermostat cover I get between 85 and 95 degrees. It depends on how hot the air temp is and how hard the motor is working.
Regards
Scooby

I think thermo couples are meant to be mounted as close as possible to the rear of the head ?not rocker cover.normal operating temp (water) is usually just below boiling ie 100 degrees as coolant takes it to about 105 - 110
Vic

I have mine connected to the forward bolt on the upper coolant outlet.
Its gets from 68c coasting down a 3klm hill in 5th and up to 94 in low range 4wd in summer.
Most of the time for trips around town,it sits in the 78 to 84c range.
It goes up a couple of degrees after shutdown.

Its not meant to be an accurate temp gauge ,but rather an indicator to tell you when things are getting critical

Thermostats open at about 88c,so I imagine Im within a cooee of operating temp.

Your thermostat opens at 78 degrees C and is fully open at 90 degrees C.

The TM2 sensor is best on one of the top water outlet bolts as it is alloy, and should reflect the water temperature.
I installed a TM2 last weekend on my daughter's 1Hz but don't have a feel for the temperatures yet.

I think you will find the factory gauges are desighned to move as little as possible - it worries people (like you found out) that the engine temps DO vary
unlike your tojo gauge which gos to 1/2 2 minutes after you start driving and stays there unless its just about to boil

Boo Boo, if it is running around those temperatures you will probably find your thermostat needs replacing, or more likely it does not have one if running that low.
As was mentioned the thermostat should open around 80°C, therefore, the minimum your engine should run at.
Chris

Thanks everyone for the info.

I'm heading for Emerald in about 1 hour and I'll see what the gauge does.

Although I think the that maybe I will get back and have the thermostat looked at.