What should I do if there is a crack in the door of my car? Is it normal for a crack to have a crack

a) Cracking. Solution: Sand the crack area until a full, smooth surface is exposed, then repaint. Regular waxing and regular maintenance can also alleviate or even avoid this condition.

Sogou asked. b) Paint fading. Workaround:

If the paint of the car is less dull and faded, you can wax the car once. If the paint loss and fading of the car surface is more serious, then it is necessary to respray the car to improve the overall aesthetics and enhance the protection ability of the car.

Sogou asked. 3) Paint oxidation. Workaround:

Paint oxidation can be treated by grinding and polishing. After grinding and polishing, the oxide layer of the paint surface can be removed, so that the car can be rejuvenated and the color can temporarily return to the state of the new car. At the same time, glazing and coating can also be carried out.

The sealing glaze can increase the sealing degree of the car paint, and it is resistant to high temperatures and UV rays. The coating is to apply the protective film of the car paint to the surface of the body to isolate and protect the car paint.

Sogou asked. Friends who love cars will also encounter the trouble of scratches on their cars.

Sogou asked. Then there is a scratch treatment on the car paint below:

1.Oxidation of the paint surface.

Under the irradiation of the sun's ultraviolet rays, the paint film continuously evaporates oil into the air to protect itself. Over time, the oil content of the paint surface will be too dispersed. The brightness and depth of the paint surface are greatly reduced, so that the paint surface slowly whitens, forming an oxide layer, and shortening the life of the paint.

The naked eye can observe the black, whitish and dull phenomenon of car paint. Severe oxidation can be treated by grinding and polishing.

2.Traffic film.

The car generates a strong electrostatic layer due to friction during driving. Static electricity has a strong ability to adsorb dust, oil and chemical dust, and forms a hard traffic film for a long time. It is very easy to cause oxidation and corrosion of the paint surface, and it can be treated with grinding and polishing.

3.Chap. If you don't take some necessary care of the paint surface, the metallic paint may produce a very fine crack, which will continue to penetrate the paint until it "breaks through" the entire color paint layer, a phenomenon called "cracking".

Sometimes, cracks can occur due to the quality of the repaint. If there is wax in the cracks, you will find that the body has a stripe (trailing lines) cracks. Frequent waxing can gradually reduce the occurrence of cracks.

4.Fade. Poor paint quality is the main cause of fading, but it can also be caused by the deterioration of the varnish layer due to light pollutants.

Fading is different from oxidation, and when fading occurs, the paint will appear unevenly colored. Medium and mild fading can be treated by grinding and polishing, and in severe cases, it must be repainted.

5.Etchs. Erosion marks are faceted abrasion. Insects, bird droppings, tree sap, tar, and asphalt can all cause erosion. Corrosion can only be treated by painting, and only a very slight can be solved by grinding and polishing.

6.Shallow scratches.

Due to friction and improper daily care during use, the car paint surface has slight scratches over time, and the primer is not exposed, which is very obvious in the sun. Generally, it can be removed by professional polishing methods.

7.Water marks.

The water marks are ring-shaped. It is the trace left after the evaporation of water droplets, and it is easier to oxidize the car and the car that is often cleaned by the washer.

It may be that the paint film is cracked, and you can go to the service station for repair.

If there is a crack in the car wash door, find a 4S shop, and they will help you deal with it.

It's definitely not normal to have cracks, the yellow thing you said is the wax that is injected, and it will be gone after a long time.

China's latest national standard "Terms and Definitions of Automobile and Trailer Types" (GB T 3730 1-2001) has the following definition of automobiles: non-track vehicles driven by power and with 4 or more wheels, mainly used for: carrying people and (or) goods; towing vehicles carrying people and/or goods; Special Purpose.

Steam power. In 1769, the Frenchman N.J. Guynew built a three-wheeled car powered by steam generated by burning it with gas. However, the speed of this kind of car is only 4 kilometers per hour, and every 15 minutes the oak clock has to stop to fill the boiler with coal, which is very troublesome.

Later, the car crashed into a brick wall during a march and shattered the collision.

In 1879, German engineer Karl Benz successfully tested a two-stroke experimental engine for the first time.

Specifically, according to the location of the crack, if there is a crack on the paint surface, it can be sanded and repainted; If there is a crack in the glass, it can be filled with glue for repair; If the tire is cracked, the tire should be replaced. After a long time of driving, the car will inevitably cause a certain amount of wear and tear, and the cracks in the car are generally due to the aging and wear and tear of the vehicle.

If the crack is relatively large and occurs on the tire, it should be replaced immediately, otherwise it will cause the risk of tire pressure drop or puncture, which will affect driving safety.

If the crack is shallow, only a small damage appears on the windshield, does not affect the safe driving of the vehicle, can be temporarily repaired, but if the crack on the glass is also relatively large, it is still necessary to replace, otherwise when encountering the high-speed section, the high speed and vibration of the vehicle are aggravated, the windshield needs to bear greater force, the internal structure of the stove may not be stable enough, the glass may not be able to withstand the huge force, and along the original crack aggravated the degree of cracking, affecting the safety of driving.

Millions of car purchase subsidies.

1. The sealing strip is cracked and can be repaired with adhesive. In particular, by using a special adhesive for sealing strips, it is easy to repair large cracks. Of course, if the seal is severely damaged or deteriorated, it is best to replace the new seal with a new one.

2. After using car detergent to clean the door and window sealant, it is best to apply a layer of high permeability maintenance agent, which can not only avoid the aging of the sealing strip but also greatly improve the sealing of the sealing strip. On top of that, the gaps in the sealing strips are simply stuffed with sand and dust, which can cause rust. To do this, use a brush to remove sand and dust.

3. When replacing all the car bodies, a layer of sealant should be applied to the lap of the weld, and the thickness of the adhesive layer should be about 1mm, and the adhesive layer should not have defects such as false stickiness and bubbles. Under the floor and under the front wheel cover, the surface should be coated with 3mm-4mm elastic coating and anti-corrosion coating. These methods can not only greatly enhance the sealing of the vehicle and slow down the corrosion rate of the body, but also greatly improve the ride comfort.

4. The sealing of the door and the body is a relatively difficult part, the sealing demand is relatively strict, some of the seals should be relatively long, the cross-sectional shape of each sealing part is not the same, and the door opens and closes frequently. In high-end cars, 3 or 4 seals are often installed, and the structure of quadruple seals is installed at the front pillar and roof side cross member. This kind of multi-layer sealing is usually placed in the front door crack, in addition to the sealing function, but also has the effect of car sound insulation and noise reduction.

5. After the window glass is damaged, check whether the sealing strip is damaged when replacing the glass. Because windows often do not return to their original shape after being repaired, it is important to pay attention to the tightness of the window glass in addition to ensuring that it can be easily pulled or lowered. If the gap between the glass and the glass notch is uneven, and the rubber strip is not in good contact with the glass and the glass groove, the sealing strip can be easily pulled off by hand.

6. When changing the roof, a layer of conductive sealant should be coated on the pressing place around the roof, and then the hemming glue should be applied in the flow tank and the joints after welding, which will not only help the sealing of the car body, but also avoid the early corrosion of the body due to water accumulation at the flanging weld.

Dongshengdi seal for you to answer:

If the seal is cracked, it is recommended that you directly replace it with a new one, choose a good automotive rubber seal, Dongshengdi has made rubber seals for 18 years.