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What Causes High Water Temperature in HOWO Trucks?

1Answers
SanAaron
08/30/2025, 02:21:30 AM

Possible causes of high water temperature include: 1. Cooling fan not working: The cooling fan may be controlled by a temperature switch or a water temperature sensor. 2. Insufficient coolant: Antifreeze - premium vehicles require year-round antifreeze; water or distilled water can be used as temporary substitutes. 3. Thermostat failure: If removing the thermostat, the small circulation loop should be blocked to ensure all coolant is cooled by the radiator. When installing a new thermostat, ensure it has a bypass hole. For example, Santana models lack this hole, requiring drilling a 6mm hole. This serves dual purposes: as a positioning mark and to allow temperature differentials across the thermostat during warm-up, enabling precise opening with water temperature changes.

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