Re: water temperature sensor on a detroit series
Well, the temp. sensor is the fat one one the right side of the head. If your gauge is moving, I would think the sensor is good since it would be on the data link with the ECM and gauge. The ECM monitors temp. separate from the gauge. Does your stop engine lights and buzzers go off when it overheats? If the buzzers go off and no fan....take the truck in and get it hooked up to see if the ECM is telling the fan to turn on. If the fan turns on when the buzzers go off I would suspect your gauge is reading warm.