What Causes High Water Temperature in a Pickup Truck?

[JuliannaFitz]

High water temperature in a pickup truck can be caused by the following reasons: 1. Radiator Leak: Open the radiator and check if the water level is below MIN. If the water level is very low, it is likely a leak. Add water, open the exhaust screw near the engine to release air, and check for the leak point. Air in the radiator can also cause the water temperature to rise. 2. Temperature Sensor: If the engine does not overheat but only shows high water temperature, it might be due to an inaccurate water temperature sensor. Replace the water temperature sensor. 3. Thermostat: If the thermostat fails to open, it prevents the circulation of hot and cold water. After the water temperature reaches 90 degrees, open the hood and touch the water pipes near the engine (be careful of burns). If the radiator is not hot, it means the water is not circulating. Both sides should be hot. Otherwise, replace the thermostat. 4. Water Pump: Over time, the fan blades of the water pump may be damaged, fallen off, or clogged, leading to poor water pump performance and preventing water circulation, which causes the water temperature to rise rapidly. In this case, the water pump needs to be replaced.