Will neutral sliding damage the gearbox?

I remember reading in the newspaper before that it is best to turn off the air conditioner and then the engine before parking, otherwise it will be bad for the car. I went to the maintenance last week and asked the mechanic, who told me not to be so careful. It's hot recently, and I often forget to turn off the air conditioner before turning off the engine. Is this harmful to cars? "A few days ago, the owner, Miss Lu, consulted this question that puzzled her.

Bian Xiao usually contacts the service managers and technical directors of many 4S stores, and really knows that many small driving actions have unintentional injuries to the car. Of course, the damage to the car caused by these small moves is a cumulative process. For example, everyone knows that smoking is harmful to health, but it doesn't mean that smoking a few cigarettes today will lead to lung cancer tomorrow-and most people will never get sick because of smoking all their lives.

In the car, some driving behaviors may cause slight damage to some parts of the car, which may accelerate the wear of parts and shorten the service life over time. For example, some people can use their batteries for three years or more, and some car owners need to change them in less than two years-it is still very important to choose the right way to use them.

Air conditioning starts and damages the engine.

For the problem mentioned by Miss Lu at the beginning, the reporter consulted a number of technical maintenance experts, and they all suggested that it is best to turn off the air conditioner one or two minutes before the flameout-this can not only dry the air outlet of the air conditioner and prevent bacteria from breeding in the air conditioner, but more importantly, if the flameout is not stopped, the engine will start with the load of the air conditioner when the next car starts. The correct way is to start the vehicle for two or three minutes, and then turn on the air conditioner after the engine is lubricated.

In addition, if there is traffic jam, waiting for people and the engine idling for a long time, it is best to turn off the air conditioner for a period of time, which can not only reduce the engine burden, but also effectively save fuel.

Gear box damaged by neutral sliding.

Owners of manual gears, especially taxi drivers, like to slide in neutral. Although there are security risks, many people are used to doing so because of fuel saving.

For automatic cars, neutral taxiing does more harm than good: now family cars are basically EFI engines. When the engine speed is above 1000 rpm, the engine will automatically stop supplying oil-if your car has an instant fuel consumption meter, you can clearly see that the fuel consumption at this time is zero. However, when taxiing in automatic neutral, the driving speed is different from the engine speed, so it is easy to have insufficient oil pressure in the hydraulic pipeline of the gearbox, which will increase friction and damage the friction plate inside the automatic gearbox, and eventually lead to gearbox failure.

Therefore, car owners who are used to driving manual gears should be careful not to suffer if they use their previous experience to drive automatic gears.

Uneven parking spaces hurt the frame.

On the roadside, you can often see half a wheel of some cars parked on the roadside. Parking in this way for a long time will lead to excessive four-wheel drop, which will deform the frame and even affect the closing of the door. Parking on uneven ground for a long time will have similar consequences.

In addition, if the wheels are not aligned after parking, it will also cause harm to the car: it will hurt the steering rod and dust cover and affect the steering system.

If the brake is not pressed to the bottom, it will shift gears and damage the transmission.

If the clutch is not pressed to the bottom, forcibly shifting gears will damage the transmission. Will automatic transmissions have similar problems?

Experts say that an automatic car can push the gear into the P gear when the brakes are half stepped on and the brake lights are on. The brake was not trampled to death, and it was directly pushed to the P gear to stall. When the road is uneven, the vehicle will move a little, which will have an impact on the transmission gear. In the long run, it will definitely be bad for vehicles.

Kill the direction, destroy the direction machine

The reporter also has the problem of driving and killing the direction: when he just learned to drive, he was in a hurry to move the library. I only dare to slowly release the clutch when I hit the dead direction and let the vehicle move. Experts warn that often killing the steering wheel will damage the steering pump of the car. If it takes a long time, it will aggravate the belt aging of the booster pump, the booster pump will be broken, and it will also have an impact on the steering gear.

If you have to kill the direction, the correct way is to go back a little immediately after killing the direction, which can avoid the damage of the direction machine.

When parking for a long time, the brake pad of the hand brake is damaged.

One morning, a car owner called for help and the right rear wheel stopped turning. Pull it to the 4S shop to disassemble the wheel for inspection, and the brake pads are stuck! Ask carefully, the owner has been on a business trip for half a month. It rained heavily before going on a business trip and pulled the handbrake when parking. The brake pads got stuck when I came back from a business trip.

The staff of the 4S shop said that it is best to level the ground for long-term parking of automatic gears, and don't pull the handbrake to prevent the brake pads from getting stuck and prolong the service life of the handbrake. Don't worry, you can find some stones to pad the front and back of the wheel.

Often forget to turn off the lights and hurt the battery.

The service manager of a 4S store once told a story jokingly: A car owner asked the 4S store for emergency rescue four times in less than a year, all for one reason-there was no electricity. The careless owner always forgot to turn off the lights when parking at night, and his car couldn't start the next day, so he had to turn to the 4S shop for help.

If the battery is dead and the car can't be started, the owner with strong hands-on ability can "borrow electricity" from the car that can be started normally next to him, and just set up a line. If you don't have this practical ability, you must ask for help from a 4S shop or a garage. It doesn't matter if the battery runs out occasionally. During the normal driving of the vehicle, the battery will be charged. It should be noted that after the battery is exhausted, it takes a long time to fully charge, and it usually takes more than 1 hour for continuous driving. If you drive short distances at ordinary times, you'd better use a charger to charge for more than 10 hour to prevent power failure.

After parking, remember to pay attention to whether the reading lights and headlights in the car are turned off. The battery of a car is a battery, and its capacity is often insufficient, which will affect its service life.

Forgetting to turn off the wiper damaged the front windshield and burned out the motor.

The wiper motor is burnt out, which happens in many 4S shops every winter: it rained and snowed the day before, and the wiper was on when driving, sometimes it was set to the maximum gear. I started the car the next morning, but the wiper froze, causing the wiper motor to burn out. Usually, we should also pay attention to this point: if the next start is sunny, a layer of dust and sand will inevitably accumulate on the front bumper, and frequent dry scraping will cause damage to the wiper glue and even scratch the front bumper glass.

Pressing the switch at will affect the electrical system.

Sometimes, the owner will have some subconscious actions, such as the window glass has obviously risen to the end, and the owner continues to press the lift switch; The wiper water has bottomed out and can't be sprayed. The owner still keeps pressing the spray switch, hoping to squeeze out some water. These behaviors will seriously affect the service life of the electrical system and even burn it on the spot.

Washing a car in the hot sun hurts paint and tires.

There is a car owner who bought a new car for half a year and the paint on the car body is cracked. The owner found the 4S shop and insisted that it was a car quality problem. Since the same batch of trains have never encountered a similar situation, the technical director inquired in detail and found that it was related to the owner's habit of using cars: there is a car wash shop at the intersection of his house, which uses cars in summer, and sometimes the owner thinks that the car is too hot, so he sends the hot car to wash first. "Hot body, often washed with cold water, is very harmful to body paint. If the car just runs through a high-speed car wash, it may even hurt the tires. "

Aging of over-polished automobile paint

Last week, Bian Xiao interviewed in a store in 4S. A car owner came over and asked the technical director to clean his car again. The technical director looked at him awkwardly: "Your car was polished only last month, and it is still so bright. Just wash and wax. " But the owner said that he is in business, from hair to shoes to cars, he should clean up and appear in front of customers.

The technical director gave an example helplessly: human skin can be regenerated, and frequent use of scrub cleanser can also cause harm. After all, car paint is non-renewable. After one or two polishing, the paint layer will become thinner and thinner, and the self-protection ability will become worse and worse, which will eventually lead to irreversible aging. Therefore, unless absolutely necessary, polishing should be done as little as possible, and more thoughtful and meticulous maintenance is needed after one polishing.

When the oil tank bottoms out, the life of the oil pump is short.

There are always some lazy drivers who like to wait for the fuel warning light to come on before looking for gas stations everywhere. The fuel pump of EFI car is cooled by the fuel itself. If the oil level is too low, it is likely to cause the fuel pump to overheat or even burn out. In the long run, the life of your car oil pump may be greatly reduced.

Experts suggest that car owners should refuel before the last quarter of the scale displayed on the oil meter to ensure that the oil pump is fully cooled, thus prolonging its service life.