Causes and Solutions for High Engine Water Temperature in FAW Trucks

As a FAW truck parts supplier, it is crucial to understand the root cause of high engine water temperature in FAW trucks. High engine temperature not only affects vehicle performance, but also may cause serious mechanical failure. The following combines industry experience and authoritative information to systematically analyze the common causes of high engine water temperature and countermeasures for FAW trucks.

High Engine Water Temperature-Cooling system problems

Insufficient or substandard quality of coolant
Coolant is the core medium for heat dissipation. If the fluid level is lower than the minimum scale or inferior coolant is used (e.g., mixed with tap water), it will lead to a lower boiling point and scale buildup, which will in turn block the piping and reduce the efficiency of heat dissipation. Coolant that has not been replaced for a long time will also corrode cooling system components and increase the risk of leakage.
Solution: Regularly check the coolant level, use antifreeze that meets the standard, and replace it every 2 years or according to mileage.
Water tank leakage or clogging
Aged, broken or poorly jointed water pipes connecting the water tank can lead to water leakage, while blockage of the radiator by scale inside the water tank or external foreign objects (e.g. willow, dust) can prevent heat from escaping.
Solution: Check the sealing of the water pipe, clean the surface of the water tank and the internal piping regularly to avoid the attachment of foreign matter.
Water pump failure
The water pump is responsible for driving the coolant circulation. If the impeller is damaged or the bearing is stuck, it will lead to reduced circulation efficiency and localized engine overheating. Especially in cold areas, failure to use antifreeze may result in damage to the water pump by internal icing.
Solution: regularly check the water pump operation status, cold season must use antifreeze, found abnormal sound or leakage timely replacement.

High Engine Water Temperature-Failure of cooling device

Abnormal cooling fan
A short circuit in the fan circuit, damage to the motor or slack in the belt will result in insufficient rotation speed to carry away heat in time. Some models are equipped with a fan clutch that, if disabled, will also affect temperature control adjustment.
Solution: Check the tension of the fan belt, test the circuit and clutch function, and replace the fan assembly if necessary.
Thermostat failure
The thermostat controls the size of the coolant cycle, if it is stuck in the closed state, the coolant can not enter the large cycle of heat dissipation, resulting in a rapid increase in water temperature. Insufficient valve opening after long-term use is also a common problem.
Solution: Test the temperature of the thermostat valve opening and closing by heating (about 80°C for normal opening and 90°C for full opening), and replace it if it is abnormal.

High Engine Water Temperature-Mechanical and external factors

Worn or loose belts
Aging and loosening of the generator or fan belt will result in insufficient water pump and fan speed, directly affecting the cooling system effectiveness.
Solution: Regularly adjust the belt tension and replace it in time when cracks or wear are found.
Engine overload or abnormal fuel injection
Long-term heavy load climbing or improper injection time (e.g., late injection) will lead to insufficient combustion and higher temperature in the cylinder, which will affect the cooling system load.
Solution: Optimize driving habits, avoid prolonged high load operation, and calibrate the injection system regularly.
Sensor or meter false alarm
Faulty water temperature sensor or wiring problems may lead to false high temperature alarms, which need to be judged in conjunction with actual working conditions.
Solution: Use diagnostic instrument to detect the sensor signal and eliminate the circuit failure.

High Engine Water Temperature-Prevention and Maintenance Recommendations

– Regularly check the cooling system: including fluid level, pipe sealing, radiator cleanliness.
– Use original parts: poor quality thermostat, water pump, etc. will accelerate system aging.
– Seasonal maintenance: clean the radiator before summer and check the antifreeze freezing point in winter.
– Driver training: avoid prolonged idling, handle alarm signals in time.

Conclusion

The high water temperature of FAW Truck’s engine is mostly triggered by defects in the cooling and heat dissipation system, which needs to be solved through systematic investigation and scientific maintenance. As a parts supplier, providing high-quality cooling system components (such as water pumps, thermostats, cooling fans) and guiding users to standardized maintenance is the key to guaranteeing the long-lasting operation of the vehicle. If the abnormal water temperature persists, it is recommended to stop the engine immediately for maintenance to avoid more serious engine damage.