What are the misunderstandings of automobile maintenance?

What are the misunderstandings of automobile maintenance?

First, automobile beauty

1, waxing, sealing and coating can not prevent scratches, but can only improve the brightness and hydrophobicity of the paint surface.

2. Although roadside stalls are cleaned by car washing, it will hurt the paint surface, and it is easy to matte if washed too much, because their car washing liquid is not wax water.

3, there is no difference between fine washing and waxing, waxing is relatively more cost-effective, because fine washing will not wax you, just mud your car surface.

4. Compared with the old car electroplating, the new car electroplating has lower cost performance, because the old car will polish the whole car, but the new car will not.

5. Toilet-cleaning spirit can wash away the gray marks dripping from the underground garage, and it doesn't need to be polished, and it definitely doesn't need sandpaper.

6, there is oil on the paint, just wash it with detergent, it is easy to wash off.

Second, car maintenance

Never do 1, 4S or repair shop's disassembly-free cleaning project. It's useless to the car, even harmful. And I've seen many cases where I signed up for the project and pretended not to hit the bottle. Generally, the commission for dismantling and cleaning is 50~80.

2. The gearbox oil must be replaced according to the maintenance manual. Don't think that many foreign gearbox oils are maintenance-free for life, and you don't change the gearbox oil yourself. Different national conditions.

3. There are three ways to change the oil in the gearbox, namely, cyclic oil change, gravity oil drain and oil unloading pan, among which the oil unloading pan has the highest cost performance.

4. When cleaning, the throttle valve must be removed, because if the throttle valve is not removed, the cleaned sewage will remain in the intake pipe. In fact, the cost of cleaning a throttle valve is very low, maybe less than 8 yuan.

5. Don't think that automatic neutral sliding saves fuel, which is not only uneconomical, but also hurts the gearbox. The automatic car can't be towed, but can only be pulled by a scooter, otherwise it will easily burn the gearbox.

6, maintenance according to the manual, where will not be pit, no matter how bragging service consultant, don't listen to him to do more projects. Common items include engine synergist, engine protector, nozzle disassembly-free cleaning, three-way catalytic disassembly-free cleaning and intake manifold disassembly-free cleaning.

7. Never do the project of cleaning engine sludge. First, damage the engine. Second, it's useless. It just looks tall.

Third, tires.

1, the blowout tire is not afraid of nail sticking, but it will not leak immediately after nail sticking. If you find that the nail is stuck, you'd better mend it before it leaks, otherwise the explosion-proof tire will be scrapped.

2. If the tire leaks and there is no tire repair nearby, it is best to put on the spare tire first. If the tire leaks and continues to drive, it is easy to deform the cord and eventually lead to the scrapping of the tire.

3, tire repair is a subsidy film, there is no need to repair mushroom nails, tire repair and car washing are often drainage, if you do maintenance or beauty at him, you can ask him not to collect tire repair money.

4. Don't wax the tires when washing the car. First, it hurts the tire. Second, it is easy to stick to dust.

The money for tire repair often goes into the pocket of the technician and is rarely given to the store.

6, tires really can't make any money, don't look at seven or eight hundred, thousands, in fact, the purchase price is also very expensive. ?