The Function of Engine Thermostat and How to Diagnose Faults

Did you know that an engine thermostat is more than just a small component that can shape the operating efficiency of heavy equipment such as excavators, tractors and loaders? It keeps the engine at the optimal temperature, allowing the equipment to run smoother. But what happens when an engine doesn't have a thermostat? And how can you tell if the thermostat is damaged? In this article, MyMROmarts will reveal the role of the engine thermostat, potential problems, and solutions to give you a comprehensive understanding of this critical component!

 

What Does an Engine Thermostat Do?

The engine thermostat is a part of the engine cooling system. Its main job is to control the flow of coolant between the engine and the radiator. This keeps the engine at the right temperature. The thermostat can improve fuel efficiency, reduce emissions, and protect engine parts by controlling the engine temperature well. It is essential in heavy equipment such as excavators, tractors, and loaders.

 

What Happens if You Run an Engine Without a Thermostat?

Some people may be curious: What happens if you remove the thermostat? The answer is that it will have a serious impact on the long-term operation of the engine. Without a thermostat, the coolant will always flow. The engine cannot quickly reach normal operating temperature. This condition will lead to the following problems:

 

1. Reduced fuel efficiency

When the engine runs at low temperatures, the fuel is not burned completely, which greatly increases fuel consumption.

2. Increased wear of parts

The coolant does not reach the appropriate temperature, and the lubricating oil cannot fully function. This will accelerate the aging of engine parts.

3. Increased emissions

Incomplete fuel combustion leads to more harmful emissions.

4. Overcooling

Overheating the engine is a problem that most people worry about, but overcooling can also affect engine performance.

 

How to Tell if Engine Thermostat Is Bad?

Once the thermostat is damaged, the engine will face the problem of engine overheating or overcooling. In heavy equipment such as excavators, tractors, and loaders, this situation can also affect production efficiency and even cause high repair costs. Here are some ways to determine if the thermostat is faulty:

 

1. Engine overheating

If the coolant temperature is too high and continues to rise, this is because the thermostat is stuck in the closed position and prevents the coolant from circulating.

2. Engine temperature is too low

If the engine has not reached normal operating temperature after a long period of operation, the thermostat may be stuck in the open position.

3. Abnormal temperature gauge fluctuation

A thermostat failure in the cooling system will cause the temperature gauge pointer to fluctuate frequently.

4. Abnormal coolant flow

Open the radiator cap and observe whether the coolant is circulating normally. When the thermostat is stuck, this will affect the coolant circulation.

5. Heater system problem

For heavy equipment equipped with a heater system, a thermostat failure can also cause the heater function to weaken.

 

Maintenance and replacement recommendations for the thermostat

Although the thermostat is small, it is related to the normal operation of the engine. To extend the service life of heavy equipment, it is recommended to check the cooling system condition regularly.

1. Check the coolant level regularly

Ensure that the coolant is within the recommended range to avoid abnormal operation of the cooling system due to lack of fluid.

2. Clean the cooling system

Clean the radiator and coolant lines regularly to reduce the risk of blockage.

 

The engine thermostat is a little part, yet it is essential to heavy machinery's regular operation. Gaining knowledge of its operation, significance, and failure modes can assist increase equipment efficiency and prevent needless losses. If you discover that your heavy machinery is experiencing unusual temperature issues, remember to examine the thermostat's condition. In order to solve the issue, this can be a crucial step.