The editor believes that car owners can be divided into two types: some treat car like a wife and take great care of it, others use car only as a means of transportation. dirty and being repaired when it's broken. In fact, editor believes that these two methods of handling cars are not very good, cars need maintenance, but they are also afraid of over maintenance. Today editor sorted out some misunderstandings about maintenance.
Many private car owners like to wash their cars under scorching sun, thinking that water on car body will dry out quickly after washing. In fact, this is wrong. When washing a car under scorching sun, convex lens effect formed by water droplets will cause a local increase in temperature on top layer of car paint. After a long time, car paint will lose its appearance. shine. If wax is applied at this time, it is also easy to cause uneven car body color. Therefore, it is best to wash and wax car in protected conditions. If this cannot be guaranteed, then it is best to choose it in morning or evening on cloudy or sunny days. Car owners should understand following common sense proper care.
1. Washing a car is like taking a bath - damaging air conditioner
When weather and temperature increase, amount of dust increases, car body gets dirty easily, and frequency of car washes by car owners also began to increase. Many car owners also want to thoroughly wash their cars, like bathing themselves. But it should be noted here that appearance of car air conditioner must be dry. If car air conditioner accidentally gets wet, it will affect service life of car air conditioner.
2. Imported tires - not applicable
Some people are especially fond of emphasizing "import" when buying tires. One of most fatal shortcomings of new tires introduced abroad is that they are not suitable for domestic users. The smooth road surface in Europe is very different from road conditions of second and third ring roads in Beijing, so tires suitable for European road conditions may not perform well in Beijing, especially in terms of sidewall impact resistance. Brand name leather shoes usually walk on a gravel road and bags on sidewall are inevitable. After some foreign-brand tires are produced by local joint ventures, a layer of cord fabric is added to side of tires according to domestic road conditions, which greatly improves impact resistance of the sidewall. Joint-venture tires can completely replace imported tires in terms of performance .
Third, new battery is not charging - shortening service life
The first charge of battery is called initial charge, which greatly affects life of battery. If it is not charged, that is, used directly with "water", battery capacity is small, and service life will be shortened; if it is charged directly, service life will also be shortened. Typically, battery is initially charged after filling with electrolyte, and it can be installed and used after charging with a small current for about 1 hour.
Fourth, depilation in a circle - effect is bad
Many people habitually apply wax to body of car in a circular motion, which is wrong way. The correct waxing method is a straight line alternating horizontal and vertical lines and then last in direction of rainwater flow to reduce effect of concentric circles on car's paint surface.
5. Too much oil is a failure
If there is not enough oil in engine oil pan, friction between bearing and journal will be poorly lubricated due to small amount of oil, which will aggravate wear rate and even cause shaft to catch fire. However, if there is too much oil, crankshaft and big end of connecting rod will mix a lot when engine is running, which will not only increase engine's internal power loss, but also increase amount of oil splashed. on cylinder wall, resulting in oil combustion failure. Therefore, engine oil level in engine oil pan should be monitored between upper and lower engraved lines on dipstick.
Sixth, coolant temperature is too low - engine is worn out
In hot weather, some drivers blindly demand that coolant temperature be as low as possible to prevent engine from getting too hot; some drivers simply remove thermostat to achieve purpose of cooling. from.
Car engines are afraid of both heat and cold: if coolant temperature is too low, fuel combustion deteriorates, fuel consumption increases, wear increases, oil viscosity increases and engine power decreases. Tests have shown that at a cooling water temperature of 40-50 degrees Celsius on move, engine wear will increase by 60-80%, power will decrease by 25%, and fuel consumption will increase by 8%. -10%. Therefore, temperature of engine cooling water should not be as low as possible, and should generally be kept within 80-90 degrees Celsius.
Seven, bolt too tight - permanent deformation
Tensioning belt can improve cooling effect of engine, so it is wrong to constantly increase tension on fan belt, which will cause fan belt to be too tight. The fan belt must be properly tensioned, as too much tension will result in excessive bearing load, increased wear and increased power consumption, as well as bending water pump shaft, elongating and deforming belt, and shortening its service life.
Eight, water tank "boils" to quickly add water - cylinder cracks
In hot weather, when some drivers see phenomenon of "boiling" in water tank, they are worried that engine temperature will rise again, so they immediately turn off engine and add water. This approach is wrong, and it can lead to cracking of cylinder head due to a sharp cold snap. If water tank is "boiling", general correct method is to stop immediately, let engine idle and continue to dissipate heat; at same time open engine cover to increase heat dissipation rate. After coolant temperature drops, turn off engine. At this time, if amount of cooling water is insufficient, it should be added slowly to prevent cracking of cylinder head due to sudden cooling.
Nine, add equipment to car at will - affects driving safety
A private car is owner's mobile home. It is clear that desire for comfort and luxury for passengers is understandable, but some car owners independently install various equipment in car. Reliability often leads to negative consequences, leaving consequences or affecting driving safety.
10. Prolonged use of vehicle or use of vehicle for short distances - damage to machine parts
Even though some people have become car owners, they tend not to "want" to drive and only go out for fun during holidays. In fact, this way of using car is very harmful to car. The surfaces of transmission parts such as engines and gearboxes will rust because they are often in direct contact with air, and battery life will also be affected by long natural discharge.
It is best to run machine every few days for 30-40 minutes. In addition, constant use of car for short distances will also damage car. The car is moving at any time, but cannot go far, which is an important cause of car damage. Parts on a car wear most heavily between starting engine and a steady state, and it takes about 20 minutes to replenish electricity consumed by battery with a single start of car. lead to premature failure of vehicle.