Engine overheating caused by poor radiator maintenance is one of the most common roadside breakdowns for heavy-duty trucks, especially during long-distance transportation, heavy-load operation and hot weather. Many drivers focus only on engine oil maintenance while ignoring the cooling system, which easily leads to radiator blockage, leakage and poor heat dissipation, causing engine overheating, cylinder damage and costly repairs.
Regular external cleaning is essential for radiator performance. Trucks often work in dusty, muddy and complex road conditions. Dust, sand, debris and catkins easily cover the radiator surface and block heat dissipation gaps. Drivers should regularly clean the radiator with low-pressure air or water. High-pressure washing is not recommended, as it may bend the cooling fins and damage the heat dissipation structure.
Standard coolant usage is critical to system stability. Tap water and mixed-brand coolant must be avoided. Impurities in ordinary water produce scale and sediment, blocking internal pipelines and reducing cooling efficiency. Drivers should check the coolant level frequently and replace coolant regularly with standard specifications to prevent corrosion, pipeline blockage and engine boiling.
It is also necessary to inspect water pipes, joints and water pumps for aging, cracking and leakage. Once abnormal water temperature rises during driving, drivers should pull over and idle to cool down instead of continuing heavy operation. Scientific and regular radiator maintenance can effectively prevent most overheating failures and ensure stable and safe truck operation.
