The hot summer is a season for frequent vehicle breakdowns. It is often seen that vehicles break down on the roadside. The root cause is the high temperature weather, which can cause the following accidents.
①The radiator is easy to "boil" and damage the cylinder gasket. The high temperature of the road surface, the high temperature of the engine running and the high temperature of the air-conditioning condenser will increase the temperature of the coolant. If the thermostat cannot be turned on, the electronic fan is worn out, and the radiator is severely scaled, the coolant temperature will increase. Rise to the boiling point, causing damage to the cylinder head gasket.
② Engine oil is easy to deteriorate and burn.When the engine is running in an overheated environment, the oilThe viscosity decreases, the oxidation resistance becomes worse, and its thermal decomposition and oxidation are aggravated.At the same time, in the high temperature airThe dust and moisture in the humid air enter the engine through the intake system and the crankcase ventThe oil pan contaminates the engine oil, causing the engine oil to deteriorate.In addition, to
The hot summer is a season for frequent vehicle breakdowns. It is often seen that vehicles break down on the roadside. The root cause is the high temperature weather, which can cause the following accidents.
①The radiator is easy to "boil" and damage the cylinder gasket. The high temperature of the road surface, the high temperature of the engine running and the high temperature of the air-conditioning condenser will increase the temperature of the coolant. If the thermostat cannot be turned on, the electronic fan is worn out, and the radiator is severely scaled, the coolant temperature will increase. Rise to the boiling point, causing damage to the cylinder head gasket.
② Engine oil is easy to deteriorate and burn.When the engine is running in an overheated environment, the oilThe viscosity decreases, the oxidation resistance becomes worse, and its thermal decomposition and oxidation are aggravated.At the same time, in the high temperature airThe dust and moisture in the humid air enter the engine through the intake system and the crankcase ventThe oil pan contaminates the engine oil, causing the engine oil to deteriorate.In addition, too high temperature will cause the oil to pass through the airCylinder walls, valve oil seals and other parts rush into the combustion chamber to participate in the combustion, which is easy to cause evaporation and burning.
③Parts wear intensified. When the engine is running at high temperature, the metal parts have large thermal expansion,The normal fit clearance between parts becomes smaller and wear is intensified.At the same time, the engine running at high temperatureCarbon deposits and colloidal substances adhere to the piston crown, combustion chamber wall, valve and other parts, which will accelerate mechanical damageBad.In addition, due to the overheating of the engine, the oil becomes thinner, the oil pressure drops, and the lubricating oilThe film is not easy to form. Also accelerates the wear of parts.
④The braking performance is deteriorated.The high temperature reduces the heat dissipation capacity of the brake pads and brake discs, and frequent brakesAfter moving. The braking force drops quickly. Especially when driving under complicated conditions such as steep slopes and sharp bends in mountainous areas,As the number of times of using the brake increases, the temperature of the braking system will rise sharply, which will make the braking performance worse.
⑤The fuel supply system is prone to air lock.After the fuel supply system is heated, part of the fuelThe body state is stored in the fuel pipe and the fuel pump, which not only increases the fuel flow resistance, but also makes the fuel supply pipeThe knocking vapor of the oil pump is continuously compressed and expanded with the pressure change of the oil pump, which will damage the oil pumpThe vacuum formed during the process causes insufficient or interrupted fuel supply to the engine, that is, fuel supplyShitong air resistance.
⑥ The mixture is not burning properly.As the atmospheric temperature increases, the mixed air temperature entering the cylinderThe temperature also rises, the temperature of the engine will be higher, so that the lubricating oil that enters the cylinder is at high temperature and lack of oxygen.Under the circumstances, colloid and carbon deposits are formed.Carbon deposits are deposited on the top of the piston, the wall of the combustion chamber, the top of the valve andA hot spot is formed on the spark plug. If the engine ignites hot, it will produce spontaneous combustion or deflagration.
⑦The load of the air-conditioning pump is heavier, and the cooling effect becomes worse.The high temperature keeps the air-conditioning pump running and emptyIf the cooling capacity of the cooling system decreases, the cooling effect will become worse.
⑧Easily puncture. The high temperature of the road will increase the temperature inside the tire and the pressure inside the tire.The frequency of tire deformation is accelerated, which accelerates the aging of rubber, and is prone to puncture accidents, especially when worn.This is especially true for badly damaged tires.
Key points of vehicle summer maintenance:
① Maintain the cooling system.Clean the radiator and engine cooling pipes to remove scaleThoroughly remove and replace the standard coolant; clean the surface of the radiator; check the electronic fanOperating conditions, replace the electronic fan if necessary; check the wear and tear of the water pump.
②Clean the lubrication system and replace the oil that meets the operating conditions of the engine. It is recommended to use anti-Synthetic motor oil with strong high temperature oxidation resistance.
③Clean the fuel supply system, including cleaning fuel injectors, fuel pump filters, and replacing fuel filtersCheck the operation of the spark plug, air flow meter and oxygen sensor.
④Check and remove the carbon deposits in the engine cylinders and on the intake and exhaust valves.
⑤Check whether the air-conditioning refrigerant leaks, and replenish it in time if it is insufficient; check the dryer,The operation of the expansion valve, replace if necessary.
⑥Keep the standard air pressure of the tires and do frequent inspections, including checking the air pressure and whether it is pierced or not.Nails, abnormal wear, cracks, bulges, etc., pay attention to remove the gravel in the tire patternWait.
⑦Check whether the brake booster vacuum tube is leaking, and replace the brake fluid on time.
