Can the thermostat be removed when the temperature of the engine is too high?

How the thermostat works?

At present, most diesel engines use wax thermostats with stable working performance. When the temperature of the cooling water is lower than the rated temperature, the thermostat valve closes and the cooling water can only circulate in the diesel engine. This is done to accelerate the rise in cooling water temperature, shorten the warm-up time, and reduce the operating time of the diesel engine at low temperatures.

When the coolant temperature reaches the opening temperature of the thermostat valve, as the diesel engine temperature gradually increases, the thermostat valve gradually opens. This allows more coolant to participate in the circulation for cooling, increasing the overall cooling ability.

Can the thermostat be removed?

When you find that the water temperature of the diesel engine machine is too high, you should first carefully check the diesel engine cooling system instead of removing the thermostat.

What problems will occur when running the engine after removing the thermostat?

• Excessive fuel consumption

After removing the thermostat, the engine will emit more heat and waste more fuel. If the engine runs below the normal operating temperature for a long time, the fuel combustion will be insufficient, which will further increase fuel consumption.

• Increase oil consumption

If the engine is operated at a temperature lower than normal for a long time, it will result in incomplete combustion of the engine, causing the oil viscosity to become thicker，the sludge will also increase.

At the same time, the water vapor produced during combustion can easily condense with acidic gases, forming weak acids that neutralize the engine oil, increasing oil consumption. Additionally, poor diesel atomization entering the cylinders can result in unatomized diesel washing the cylinder walls with oil, leading to oil dilution and increased wear on the cylinder liners and piston rings.

• Shortens engine life

Due to the low temperature, the viscosity of the oil is high, which cannot provide timely lubrication to the friction parts of the diesel engine, resulting in increased wear of the engine components and a decrease in engine power.

The water vapor produced by combustion easily condenses with acidic gases, increasing corrosion to the engine and shortening the engine's lifespan.

When it is determined that the thermostat has failed, it should be replaced with a new one.