Summary of common problems in today’s cooling system

The cooling system plays an important role in a car. It helps cool the engine and keep the engine working at a stable temperature. A damaged cooling system will cause the engine to overheat and can lead to unfortunate damage to engine components and loss to you. The following article of P69 Company will outline the common problems in the current cooling system to help you recognize and fix it in time to use the car more effectively.

Working principle of cooling system

Engine cooling systems can be divided into two categories: liquid-cooled systems and air-cooled systems. Air-cooled systems can be found on digital motorcycles today. The water-cooled cooling system is mainly used in automobiles due to its ability to effectively cool in most operating conditions on the highway or in the city with frequent off-roads.

Working principle of cooling system
Working principle of cooling system

The cooling system includes cooling water circuits inside the body and the cylinder cover, these cooling water circuits go around the body and the cylinder cover to achieve the best cooling effect. A water pump is used to circulate the cooling water, a thermostatic valve is used to adjust the coolant temperature to the required temperature, a water tank is used to cool the cooling water and a radiator cap is used to adjust. pressure inside the cooling water pipe.

The cooling system works by circulating coolant around the body and the cylinder head. As coolant circulates through them, it takes heat away from the engine. Hot water will then be pushed to the cooling water tank, the water will be divided into small pipes inside the water tank and cooled by the wind generated by the cooling fan and at the same time with the wind caused by the car moving. for water cooling. When the hot water is cooled, it will continue to circulate back inside the engine to continue the continuous cycle thanks to the operation of the water pump.

Summary of common problems in today’s cooling system

Car engine overhauls have always been largely due to the original cooling system problem. So to see how important they are in the engine. And here are the problems in the cooling system that car owners should pay attention to early detection:

1. Water pump is broken

The car’s engine is usually located in front of the car and under the bonnet for better aerodynamics and fuel economy, so it cannot be cooled by natural air flow. So it uses liquid cooling to flow through the water pipes to reduce heat. Water is transported by a water pump, powered by a pulley that is rotated by a belt.

So when the water pump is damaged, the belt is broken, it is slipped, it will not be able to bring the coolant through the engine system, the engine will quickly overheat and  damage the cooling system. car .

The water pump has a very long life, approximately 161,000 km, but it can also fail earlier due to different reasons. You need to replace immediately when the water pump is damaged to ensure the operation of the engine.

2. The motor is overheated

Engine overheated
Engine overheated

Engine overheating can come from many causes, including:

  • The thermostatic valve that allows cooling water to pass through can be stuck in the closed state or blocked by deposits and debris in the system.
  • Lack of cooling water, leaking coolant in the radiator or radiator hoses, pumps, heating pipes. Old coolant can lose its corrosion-inhibiting properties, allowing rust to form and eventually causing  damage to the car’s cooling system .
  • The radiator cap is damaged and no longer maintains sufficient pressure in the water cooling system, causing the coolant to boil (engines typically operate between 210 and 220 degrees F)
  • Sealed gaskets between the cylinder head and the engine block can be damaged, causing coolant to leak inside the combustion chamber. Steam coming out of the exhaust system can be seen.

3. Leaking car cooling system water tank

The water tank is made up of small water pipes, interspersed with thin aluminum foils, helping to dissipate heat faster. It’s job is to absorb heat from the coolant by running through small water pipes in the radiator, and the air flow from the front of the car is transmitted to cool the engine.

A small leak in the radiator not only affects the engine’s ability to cool, but it also causes the engine to overheat quickly. If the water tank is punctured due to external influences such as impact with rocks or debris while traveling on the road, you need to replace the water tank immediately.

4. Water leakage in the water pipe

Water leak in water pipes
Water leak in water pipes

Coolant is flowed through the engines and cooled by a series of water pipes. If a water pipe leaks, not only will there not be enough pressure to complete its cycle, it will also leak out.

This will cause the engine to overheat quickly and can cause  damage to the car’s cooling system . Water pipes will degrade over time, so you need to be careful to make sure to replace them at regular intervals.

5. Cooling fan is broken

When used for a long time, under the influence of high temperature, the insulating glue will melt and damage the fan motor. Because the fan blades are made of plastic, when under the influence of high temperatures for a long time, the blades will become brittle and easily broken, in addition, dirt clings to the blades, making the airflow limited. So you need to maintain as well as replace the cooling fan when damaged.

You should regularly check the cooling system, to make sure they work in the most smooth way and also identify the  damage your car’s cooling system  is experiencing through the causes listed below. mentioned above.

6. Rusty water tank

Rusty water tank
Rusty water tank

If you observe that the coolant is discolored, contains dirt. Or see the appearance of some slurry rust along with the cooling water. It’s your coolant tank that has rusted inside. The rusted part of the water tank has degraded the cooling water, causing scale formation.

If you find this situation, you should replace the cooling water tank immediately. To prevent the coolant from working effectively and causing damage. Besides, you should also check the cooling water tank regularly. To detect damage in  the car engine cooling water system .

7. The cooling water tank is clogged.

The water tank is an important component in  the car engine cooling water system that  is made up of many narrow pipes. When used for a period of time, it will cause deposits and rust. Then the cooling water will be difficult to circulate. And for a long time, it could not be circulated anymore. This problem also causes an increase in water pressure on the tank wall and causes a leak.

What to do when this happens? The solution is that you should go to the garage to check, rinse and unclog the clogged water tank. Should check the water tank regularly when the phenomenon of deposits and blockages must be cleaned immediately. To ensure the circulation of cooling water, cooling your car engine.

Contact us today for a free consultation and answer at:

Contact information P69 – M&E Contractor

Address: No. 6/165C Xuan Thuy, Cau Giay District, Hanoi


Hotline: 02422121212 – 0965937799




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