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what is normal operating temp.
About 200 degrees is normal
Normal around 210
210
200
I take it you are referring to a civilian HMMWV? I know the operating temp for the military counterpart is 180deg F.
196 degrees Fahrenheit.
Normal operating Temp is about 87C
195 to 210 degrees is NORMAL operating temperature.
195 to 210 degrees is the normal safe range.
An engine might sound like a diesel at operating temperature if the engine was a diesel or if there was an issue with the manifold. Sometimes gases escaping the manifold cover could cause the engine to sound different.
195 F