Cars generally replace the water every two years or every 40,000 or 50,000 kilometers. For the specific replacement cycle, it is recommended that car owners refer to the requirements of the vehicle maintenance manual. The water referred to here is essentially the engine coolant. If the engine coolant is used for a long time at high temperature, it will inevitably lead to deterioration and reduce the performance. Therefore, be sure to replace them regularly.
The heat dissipation of the engine directly determines its service life and performance. How to use the coolant correctly is very important. The following briefly introduces the matters needing attention during the use of coolant:
1. If the cooling system has used water before, use a special water tank descaling and rust cleaning agent to clean the water tank before adding the coolant, and then add the coolant. If the engine cooling system is not cleaned carefully, and the coolant is added directly, it may block the water pipes, water channels, or there are sediments in the elbow joints at the lower part of the water tank, resulting in poor heat dissipation.
2. It is forbidden to directly add coolant concentrate. Some car owners mistakenly believe that the higher the concentration of ethylene glycol in the coolant, the better. In fact, adding antifreeze concentrate directly will not only fail to meet the freezing point requirements of antifreeze, but will also cause unexpected phenomena, such as increased viscosity and engine temperature. higher phenomenon. Therefore, when using antifreeze concentrate, it should be prepared as required, and direct use is prohibited.
3. Coolants of different manufacturers and brands cannot be mixed. Different brands of coolant have different production formulas. If they are used in combination, chemical reactions are likely to occur between various additives, causing the additives to fail, causing precipitation, scaling and corrosion and other hazards, thus affecting the service life of the engine.
4. Regularly check the technical indicators of the coolant. The validity period of the coolant is usually 2-3 years, and it is usually replaced with seasonal maintenance. However, the technical indicators of the coolant in use should be checked regularly, including appearance, freezing point, density and PH value, etc.DiscoverThe coolant should be replaced in time when it becomes muddy, deteriorated, smells bad, foams, has suspended solids, sediments, increases in density, thickens, rises in freezing point, and when the PH value is lower than 7.5 or higher than 11.0.
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