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Gradually into the winter, especially in the northern regions, the sudden drop in temperature has a great impact on the driving, but in terms of the car itself, it is particularly important to replace the antifreeze and check the electrical equipment in time. Here are the major items to be introduced below:
Replace various fluids
1, the use of low condensation point, good fluidity of the fuel. The viscosity of the fuel increases at low temperatures and the fluidity deteriorates. Poor atomization can easily deteriorate the combustion process of the fuel, and the startability, dynamics, and economy of the engine are significantly reduced. Therefore, the lower freezing point should be used if conditions permit. Fuel. The general selection principle is that the condensation point of the fuel is about 5°C lower than the ambient temperature.
2, change the oil. The engine oil with smaller viscosity is used. Under low temperature conditions, the viscosity of the engine oil increases with the temperature drop, and the fluidity deteriorates. Therefore, the adverse effect should be compensated or eliminated by timely replacing the oil with smaller viscosity.
3, replacement of various lubricants and greases used in winter. Into the winter to deal with the transmission, the main reducer, steering gear and other use of winter lubricants, hub bearings replaced with low drop point grease.
Maintaining the engine cooling system
1. Check the working status of the thermostat and ensure that the thermostat works well and prevent the engine water temperature from being too low or too high. If the engine is often at a low temperature, it will lead to increased wear of the parts.
2, remove the scale inside the water jacket. The engine water jacket is cleaned to remove internal scales and prevent excessive accumulation of scale. This affects the engine's heat dissipation and makes the engine temperature too high. If the scale blocks the water release switch, it will cause the water to be drained.
3, add antifreeze. When the temperature is too low and the conditions permit, antifreeze can be used. The cooling system should be thoroughly cleaned before use. Antifreeze with good quality and low corrosion should be selected to avoid corrosion of the parts due to the quality of the antifreeze. occur.
Maintenance of electrical equipment
1, check and adjust the electrolyte density. The density of the electrolyte can be appropriately adjusted to prevent the occurrence of an accident of a frozen battery case due to a low density of the electrolyte.
2, increase the generator charging voltage. As the battery discharge capacity increases at low temperatures, the generator charge must be increased, and the regulator limit voltage can be appropriately increased. Under normal circumstances, the limit voltage of the regulator in winter is 0.6V higher than in summer.
3, maintenance start motor. In winter, it is difficult to start the engine and the number of starter motors is used frequently. If the starter has insufficient power, it will further increase the difficulty of starting the engine. Practice shows that in the summer, if the starter is slightly faulty and the power is slightly insufficient, the start of the engine may be very smooth, but it will become difficult to start in the winter, or even start. Therefore, it is necessary to perform a thorough maintenance on the starter and keep the starter parts clean and dry. In particular, good contact between the brushes and the commutator should be maintained.
4, to strengthen the battery insulation. In order to prevent the battery from freezing and affect the start-up performance, a mezzanine insulated battery box can be made for the battery in winter to increase the temperature of the battery.
Adjust fuel system and ignition system
In winter, the height of the carburetor float chamber oil can be appropriately increased and the stroke of the accelerating oil pump can be adjusted so that the mixture can be adapted to the needs of low-temperature operation.
In order to facilitate the low temperature start, the contact closure angle of the breaker should be increased appropriately. The contact gap is adjusted to 0.30-0.40mm to enhance the spark strength.
Maintenance preheater
For engines with preheating devices (mostly diesel engines), check and maintain the preheating equipment before entering the winter to ensure that the technology is in good condition. During the maintenance, the circuit and the oil circuit are mainly checked to prevent the starting of the engine from being affected due to the poor operation of the preheating device. 
