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We checked the temperature guage by dipping an engine thermometer through the radiator cap and then warming the engine up. We checked the temp of the coolant and the temp on the engines temp guage every 5 minutes for about 1/2 and hour. They only read about 5 degrees different which I understand is okay since the coolant temp will be different in different areas of the engine.
We changed the thermostat and the gasket yesterday. We've got a good seal.
I'm not sure that I actually do have a problem but my engine manual says to make sure it runs between 170 and 190. I didn't even realize that there might be a problem until tracing a problem with our hot water heater which is not heating efficiently off the engine.
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