ok guys, new question(s), I have the '74 2.3 in an Anglia, using the Anglia temp sensor and gauge and a new thermostat. Finally got car running and proceeded to drive it around some to test it out. The temp gauge needle slowly rises to H (for hot) briefly, then falls fast to the middle. Then after a moment or two goes back to H and repeats falling fast to the middle.
To understand what is really happening, I put an aftermarket mechanical temp sender and gauge. It slowly goes to 190 degrees and rapidly falls to 170 and repeats. Therefore I am convinced the H is probably about 190 degrees while the middle area is about 170 degrees on the anglia gauge.
First question, what is the temperature rating of the stock thermostat? I dont remember which one I bought but it was suppose to be "stock".
Second, question...wou ld a non pressurized or low pressure radiator (referring to the anglia radiator) require a lower temp thermostat? I think that might be why it will go to "Hot " while it really isnt hot. Pinto was pressurized... right?
and why would it be rising and falling, it is as if the thermostat (brand new) is opening fully and then closing.
I will be pulling out the thermostat to see what temp rating it is, but I thought I would post this first.
I will throw this out too...with the rad cap off, you can see the flow taking place, the coolant is moving quite good until the thermostat shuts the flow off. and the rad was cleaned and tested prior to installing by a rad shop. thanks all