What Does Semi Truck Coolant Do?

Semi truck coolant is a vital component of any commercial truck’s engine. It helps to keep the engine cool, allowing it to function at its best.

Without coolant, the engine would quickly overheat and become damaged. It is important to maintain your semi truck’s coolant system in order to ensure that your vehicle runs optimally.

What Does Semi Truck Coolant Do?

Semi truck coolant works by transferring heat away from the engine and dissipating it into the atmosphere. In doing so, it keeps the engine from overheating and causing damage to its components.

The coolant itself is a mixture of water, antifreeze, and other additives that help protect the cooling system from corrosion and scale buildup. This mixture is circulated through hoses, or channels, by a radiator pump.

The radiator pump pushes the coolant through cooling fins on the radiator which absorb heat from the engine and then push it out into the atmosphere. The coolant is then recirculated back into the engine where it absorbs more heat and continues this process until optimum temperatures are achieved.

Cooling systems also contain a thermostat which monitors the temperature inside of an engine. When temperatures get too high, the thermostat will open up a valve in order to allow more coolant to circulate through the system. This helps to reduce temperatures inside of an engine before they reach critical levels.


It is important for semi truck owners to properly maintain their cooling systems in order for them to run effectively and efficiently. This includes regularly flushing out old coolant and refilling with new fluid as well as regularly inspecting hoses for signs of wear or damage that could be causing leaks or reduced efficiency.


Semi truck coolants are essential components in any commercial vehicle’s engine system. They help keep engines running optimally by transferring heat away from components and dissipating it into the atmosphere while also providing protection against corrosion and scale buildup within cooling systems. Regular maintenance of these systems is necessary in order for them to run effectively and efficiently.

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James Gardner