A thermostat is a device that controls the flow of coolant liquid in the engine's cooling circuit. Every engine has a certain ideal working temperature that it needs to reach for its optimal operation.

If the engine does not work at its ideal working temperature - it is not optimally warmed up - it leads to higher fuel consumption, worse operation, higher noise, but also greater wear of all engine parts.

Every internal combustion engine needs an optimal temperature for its efficient operation. The cooling system ensures this optimal engine operating temperature, without which the engine would quickly overheat and seize.

There are several ways to cool the engine, but when it comes to liquid cooling, the cooling system logically needs coolant liquid to function properly.