[Steeveedee]

I have a 180° thermostat, but pulling a hill with my travel trailer the engine has gotten up to 260°, which is about as hot as would be allowed.. It helps that there is no air in the system and I had a good cap. I don't like it, and went to a truly heavy duty fan clutch, but haven't taken the trailer out for a camp out since I put that clutch on.