What Causes High Temperature in Diesel Vehicles?

1 Answers
GiaLynn
07/29/25 10:10pm
Reasons for high temperature in diesel vehicles are as follows: Water pump damage: When the water pump is damaged, the coolant cannot circulate in the cooling system, and thus cannot carry away the heat generated by the engine combustion. Insufficient coolant or use of unqualified coolant: When the coolant is insufficient or completely missing, there is no cooling medium in the cooling system to transfer the engine heat, leading to high temperature. Additionally, modern engines operate at temperatures higher than the boiling point of water. If unqualified coolant is used as the cooling medium, it can also cause engine overheating. Thermostat damage or stuck: When the thermostat is damaged or stuck, the engine only operates in a small cycle, and the radiator fails to dissipate heat effectively, resulting in low cooling efficiency and engine overheating. Fan not rotating: The fan may not rotate due to two reasons: one is the fan itself being damaged, such as broken fan blades, stuck fan, or broken fan belt; the other is a control circuit failure, which fails to provide the electronic fan with the operation signal. Dirty radiator surface, poor heat dissipation: When the radiator surface is covered with dirt, heat conduction is poor, and heat cannot be dissipated into the air in time, leading to engine overheating.
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