Learn about car cooling systems

The car cooling system is one of the most important parts of the engine. This system reduces engine temperature and helps the engine work at the most stable and optimal temperature. Join CarOn to learn more interesting information about this system!

What is a car cooling system?

The car cooling system is one of the most important parts of the engine. This part has the function of regulating the vehicle’s engine temperature by reducing the temperature produced by the fuel combustion process, maintaining the temperature level at a permissible threshold, helping the engine and other mechanical parts in the vehicle operate. stable operation in particular and safe and stable vehicle operation in general.

Types of cooling systems in cars

Air cooling system

The air cooling system has a simple structure, including heatsinks on the cylinder cover, engine body and fan. This system operates thanks to drive from the engine crankshaft or operates independently thanks to power supply.

Instead of circulating fluid through the engine, the engine block is encased in aluminum fins that conduct heat away from the cylinders. A powerful fan blows air over these plants, cooling the motor by transferring heat into the air

The car’s air cooling system has a simple and compact structure, so it only costs little. Besides, because there are not many complicated parts, this system does not require regular maintenance. Causes loud noise during operation; Cooling efficiency is not high, especially in large engine blocks

Water cooling system

This system has a complex structure, including: car radiator, radiator cap (vacuum valve and pressure valve), thermostat, water pump and fan (forced circulation cooling).

Nowadays water cooling systems are commonly used due to their superior cooling ability

The car’s water cooling system has much better cooling performance than the air cooling system, and does not make noise during operation. Complex structure, high cost, need periodic maintenance.

Structure and operating principle of water cooling system

*Safe Water

The water tank in the car’s cooling system functions to store water and transfer heat to the water and to the outside air.

The water tank is made of small, narrow tubes, interspersed with thin aluminum foil to dissipate heat faster, ensuring the best cooling requirements.

*Water tank cover

The car’s cooling system is closed, so it will be closed and pressurized by the radiator cap. The radiator cap includes a pressure valve and a vacuum valve, which will seal, reduce the loss of coolant due to evaporation, increase the boiling temperature of coolant from the pressure increase, helping to increase cooling efficiency.

When the coolant temperature increases and the pressure in the water tank increases, the pressure valve will automatically open, and coolant flows to the auxiliary tank.

Conversely, the vacuum valve will open to suck water from the auxiliary tank into the water tank to maintain cooling operation when the coolant temperature increases but the pressure in the water tank is low.

*Thermostatic valve

The thermostat valve in the forced circulation water cooling system is used to adjust the temperature and determine the circulation of coolant from the engine to the water tank.

When the engine first starts and the engine is still cold, the thermostat valve will close, limiting water exchange to the cooling tank. This will save time warming up the engine and save fuel.

When the temperature in the engine is higher than the specified level (about 87-102 degrees Celsius), the thermostat will open to control the coolant to cool the engine.

*Water pump

The water pump is arranged in front of the engine, usually a vane type, which has the effect of sucking and pushing a large amount of coolant from the radiator to the engine without increasing the pressure in the exhaust system. use centrifugal force.

When the engine speed increases, the pump speed increases, quickly transporting a large amount of coolant into the engine, helping the engine cooling process to be equivalent to the engine’s heating rate during operation. onion.

*Cooling fan

The cooling fan is responsible for increasing the speed of air circulating through the water tank so that the coolant is cooled faster.

In addition, the cooling system also includes: water pipes, auxiliary water tank, water pump and other parts related to steam air conditioning inside the vehicle compartment.

Signs that the cooling system is damaged

The water tank is rusty

When you notice that the cooling water is pale in color, contains a lot of dirt or appears thick with rust residue, it is a sign that the water tank is rusty inside and the rust in the tank walls will denature the cooling water, causing damage. so the above phenomenon. In this case, it is best to replace the water tank with a new one to ensure safety because when the inside of the water tank is rusty, it is easily clogged and unsafe.

The coolant tank is clogged

Not regularly changing coolant, using non-standard coolant or supplementing with regular water are the main causes of clogged car radiators. Using engine coolant in the following ways will cause precipitation and scaling of chemicals in the coolant circulation system. After a period of use, these precipitates will accumulate and stick to increasingly thicker pipe walls, leading to poor circulation of cooling water or complete blockage.

Leaking water pipes

Water pipes are usually made of rubber. If used for a long time, they will wear out, become calloused, and easily break, leading to coolant leakage. When pipes leak, coolant will not be sufficiently directed to the engine system, and the engine will not be cooled effectively.

You should check regularly to make sure that when this condition is discovered, car owners need to immediately replace new water pipes for their car.

Problem with the engine’s thermostatic valve

The thermostatic valve helps control the flow of coolant through the cooler when the temperature rises and keeps that amount of water in the machine when it is not hot enough to continue absorbing heat. A damaged thermostat will not be able to open automatically when the water temperature increases, causing water to not circulate through the coolant tank and the engine temperature will increase rapidly, possibly causing serious damage. When the thermostat valve is damaged, you should immediately replace it with a new one

Water pump is not working

The water pump is responsible for circulating the coolant flow in the cooling system. Damage to the pump will prevent water flow and cause the engine to overheat. Water pumps usually have a fairly long lifespan: about 100,000 miles (~ 161,000km), but they can also fail sooner. When the pump is damaged, you must replace it to ensure engine operation.

The engine fan is broken

The fan helps regulate the temperature of the engine. When used for a long time in high temperatures, the insulating glue often melts, causing the fan motor to be damaged, and the plastic fan blades will also easily break. This makes the fan not concentric and unusable. If the fan is damaged, it needs to be replaced with a new one, avoid leaving it for a long time.

Note for car cooling systems

  • Change coolant periodically after 40,000 to 50,000 km or after 3 years.
  • Check cooling water regularly and periodically to promptly supplement when detecting a shortage.
  • You should only add coolant with distilled water, or use coolant solution as recommended by each brand.
  • If you encounter overheating, you need to turn off the machine and go down for a preliminary check to find a solution.

Reputable car maintenance address

For a car to function well, all parts must operate smoothly, and the same goes for the car’s cooling system. Understanding the car’s cooling system along with regular care and maintenance also contributes to helping you have a good, durable car. A reputable address for car owners to feel secure in maintaining their beloved vehicles: CarOn Pro

CarOn 5S - 5S standard car service system

With the motto of putting service quality and user experience first, CarOn has been trusted and chosen by many customers. Don’t wait any longer, contact us immediately via hotline: 0961.247.360 or website https://caronpro.vn/ for the fastest advice and support!

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