I think the checking the temp by other means is a good idea. You can ck the temp with the radiator cap off and put a dial thermometer in the radiator fill neck. I have also checked the temp guage sensors by removing them, extending the wiring to reach a work table, get a hot plate, pour some light oil in a pan and slowly heat it with the key turned on and a reliable candy thermometer in the oil. Compare the readings to see if the guage or sender is off. Chris

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.