What are the causes of high temperature in truck engines?
1 Answers
The causes of high water temperature in trucks generally include the following: 1. Insufficient or improper coolant: Due to the extremely high internal temperature during operation, diesel engines have strict requirements for the coolant. Severe lack of coolant can prevent timely heat dissipation from engine components, leading to excessive water temperature. 2. Insufficient cooling surface area: Diesel engines are designed with cooling water surface areas matched to their power and load. However, since most coolants in water-cooled diesel engines are a mixture of water and ethylene glycol, and sometimes even tap water is added in summer, long-term use of substandard coolant can cause significant scale buildup in the cooling pipes, blocking them and reducing cooling efficiency. 3. Thermostat failure: The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature, altering the water circulation range to regulate the cooling system's heat dissipation capacity and ensure the engine operates within an appropriate temperature range. If the thermostat fails, the vehicle's cooling system may not perform a large circulation, causing the water temperature to rise. 4. Cooling fan malfunction: During high-speed operation, if the generated heat cannot be transferred to the antifreeze in time, it can affect heat dissipation, leading to an increase in antifreeze temperature and issues like boiling over.
