My 60' has always ran cool and temperature gauge never read higher than 180 degrees even up mountainous areas. Had forward wire harness replaced and at same time changed Temperature Sender to a Corvette Central unit. Readings then went to 180 as before but increased while driving to 200 and 210. Strange thing was reading would change while driving from say 200 -210 back to 180 within 8-10 seconds so erratic. I used a infrared thermal temperature gun on the upper and lower radiator hose and found normal readings of 185 top and 170 lower. I then purchased an NOS temperature sender unit and installed which resulted in not change to these erratic readings. I changed the thermostat as well with another 160 degree unit and no change again. I then pulled the Dewitt high capacity radiator and had an old timer radiator shop pressure rinse and was told that it was fine and no sign of any blockage either. I also pulled my temp gauge and sent out for restoring and was told that it was fine so they sent it back to me with no work required. I might add that the radiator never overheated and car never gave any sign of actually running hot either.
I have attempted to re-install the first temperature sender I removed but can no longer find it for some reason. I also might add that I had an issue with the wiring under dash that I was told that some wiring was not connected properly but that seemed to fix the emergency brake light from staying on even with brake lever was collapsed only.
I have been told that there could there be some grounding issue going on here that would cause the temp to move around so much in the course of driving as it doesn't just go high and stay there it moves around within 8-10 seconds and could actually go lower when I encounter traffic which I might have to slow down for.
I could use some advice on what to do next, I bought a resister that I could adjust the temp reading to be correct but as the temp fluctuates it is not just too high all the time.
I have attempted to re-install the first temperature sender I removed but can no longer find it for some reason. I also might add that I had an issue with the wiring under dash that I was told that some wiring was not connected properly but that seemed to fix the emergency brake light from staying on even with brake lever was collapsed only.
I have been told that there could there be some grounding issue going on here that would cause the temp to move around so much in the course of driving as it doesn't just go high and stay there it moves around within 8-10 seconds and could actually go lower when I encounter traffic which I might have to slow down for.
I could use some advice on what to do next, I bought a resister that I could adjust the temp reading to be correct but as the temp fluctuates it is not just too high all the time.
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