What Causes High Water Temperature in Yuchai Engines?
2 Answers
The reasons for high water temperature in Yuchai engines are: 1. Thermostat failure, preventing coolant from circulating in the large loop; 2. Blockage in the radiator or engine water jacket; 3. Corrosion of the water pump impeller leading to insufficient pumping pressure; 4. Bent or deformed radiator fins or blockage by foreign objects; 5. Severe leakage resulting in insufficient coolant; 6. Delayed engine ignition timing; 7. Loose water pump belt; 8. Electric fan not working or rotating too slowly. The engine is the device that provides power for the vehicle, converting the thermal energy of gasoline and diesel into mechanical energy by burning and expanding the gas in a sealed cylinder to push the piston and perform work. Its components include: 1. Valve train; 2. Crankshaft and connecting rod mechanism; 3. Ignition system; 4. Cooling system; 5. Lubrication system; 6. Starting system; 7. Fuel supply system.
Having driven trucks for so many years, I've seen plenty of cases of high water temperature in Yuchai engines. The most common issue is insufficient coolant, either due to leaks or evaporation, which needs to be topped up immediately. A radiator clogged with dust can also cause overheating, especially on long-haul trips where dust accumulation is more likely. A faulty water pump is a major culprit, as poor water circulation leads to rapid temperature rise. Other causes include a stuck thermostat that won't open or a loose fan belt that prevents proper rotation. I remember one summer when hauling a heavy load, the water temperature suddenly spiked and triggered an alarm. After pulling over, I found the water pump was leaking—replacing it solved the problem. These issues all require proactive checks; don't wait until the engine cracks to regret it.
