Engine Cooling Issue?
I have a Motorhome powered with a Cummins 275 Turbo. I am new to diesel engines and my question that when I was in the mountains of Tenn. the temperature gauge went up to very high. It was still in the normal range but concerned me. Is this normal that the temperature will climb under load or do I need to flush the radiator for better heat transfer. 12 year old motorhome
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