What is a Vehicle License?

How many kilometers should a car drive before needing carbon deposit cleaning?

Cars driving in urban areas are recommended to have carbon deposits cleaned every 20,000 kilometers, while cars frequently driving on highways can have it cleaned every 30,000 to 40,000 kilometers. Engine carbon deposits: Engine carbon deposits refer to a coking-like substance produced by unsaturated olefins and gums in fuel under high-temperature conditions during engine operation. Types of carbon deposits: Carbon deposits can be divided into two types: valve and combustion chamber deposits, and intake pipe deposits. Valve and combustion chamber deposits: Due to the control characteristics of electronic fuel injection engines, each time a cylinder operates, fuel is injected first and then ignited. When the engine is turned off, the ignition is immediately cut off, but the fuel injected during this cycle cannot be recovered and can only adhere to the intake valve and combustion chamber walls. The fuel evaporates easily, but the wax and gum substances in the fuel accumulate over time. With repeated heating, these substances harden and form carbon deposits. Intake pipe deposits: Since the pistons in an engine do not operate synchronously, when the engine is turned off, some cylinders' intake valves may not fully close. Unburned fuel continuously evaporates and oxidizes, forming softer black carbon deposits in the intake pipe, especially behind the throttle valve.

10

5

Share

Does foreign matter falling into the fuel tank during refueling have any impact?

If it is a liquid, there will be an impact; if it is a solid, it should be fine. Reason: There is a fuel filter in the fuel tank. If there are foreign objects in the tank, they will be filtered layer by layer by the filter, or you can manually remove the foreign objects. However, gasoline is a flammable and explosive substance, so it is not recommended to handle it yourself due to certain safety hazards. Classification: Fuel tanks can be divided into two types: open tanks and closed tanks. The fuel tank must have a sufficiently large volume. To maintain the cleanliness of the fuel, the tank should have a sealed cover plate with an air filter installed on it. The bottom of the tank should be at least 150mm above the ground, and sufficient attention should be paid to the anti-corrosion treatment of the inner surface of the tank.

6

4

Share

Will insurance cover water damage without water wading coverage?

For car owners without water wading coverage but with vehicle damage insurance, water damage to the car will be covered by insurance. However, if there is no vehicle damage insurance, it will not be covered. Auto insurance reform: For vehicle damage insurance purchased before the auto insurance reform, water wading coverage must be additionally purchased to cover engine damage caused by water submersion. Other damages can still be claimed under the vehicle damage insurance. For auto insurance purchased after the reform, vehicle damage insurance already includes water wading coverage, so car owners do not need to purchase it separately. Both water damage to the car and engine damage caused by water submersion will be covered by insurance. Important notes: Before the auto insurance reform, water wading coverage could only be added as an endorsement after purchasing vehicle damage insurance.

1

2

Share

What Causes Fogging on Car Windshields?

Reasons for fogging on car windshields: There is a temperature difference between the inside and outside of the car. The outside temperature is low, while the inside temperature is high. The windshield, which separates the inside from the outside, also has a low temperature. The water vapor inside the car condenses into water droplets when it encounters the cold windshield, forming a layer of fog that significantly impairs visibility. On rainy or foggy days, the air humidity is high, and the humidity inside the car is also high, with more water vapor, making it easier for condensation to form fog. Methods to remove fog: Opening the windows can equalize the temperature inside and outside the car, eliminating the temperature difference and preventing fogging. This method is suitable when the weather is not too cold and it is not raining, although the defogging effect is relatively slow.

20

4

Share

What are the models and specifications of adjustable wrenches?

Specifications: Common specifications for adjustable wrenches include 150mm×19mm, 200mm×24mm, 250mm×30mm, 300mm×36mm, etc. Dimensions: Adjustable wrenches come in 9 sizes: 100, 150, 200, 250, 300, 375, 450, 600, and 650. The optimal opening size can be calculated by dividing the above specifications by 10. Structure: An adjustable wrench consists of a head and a handle. The head is composed of a movable jaw, a fixed jaw, a wrench opening, a worm gear, and a pin. Adjustable Wrench: Commonly known as a crescent wrench, its opening width can be adjusted within a certain range, making it a tool used for tightening and loosening nuts and bolts of different specifications.

14

4

Share

Is a lottery required to buy a car in Haikou?

Haikou conducts a monthly lottery for car purchases. Lottery methods: There are two ways to participate in the car lottery: online application and in-person application at the local vehicle management office. For online applications, you need to register an account on the designated website, fill in the application information, and obtain an application code upon successful submission. For those unable to apply online or in cases requiring in-person confirmation, applicants should visit the local regulation service window. From August to December 2019, Hainan allocated 50,000 additional small passenger vehicle quotas, with lotteries held monthly. Starting from August 1, 2019, out-of-province licensed small passenger vehicles entering Hainan must be registered, and vehicles with out-of-province license plates are limited to a maximum of 120 days of operation in Hainan per year.

2

Share

What is a Vehicle License?

How many kilometers should a car drive before needing carbon deposit cleaning?

Does foreign matter falling into the fuel tank during refueling have any impact?

Will insurance cover water damage without water wading coverage?

What Causes Fogging on Car Windshields?

What are the models and specifications of adjustable wrenches?

Is a lottery required to buy a car in Haikou?

Is it normal for a car sunroof to have slight water seepage?

Is It Normal for a Car Hood to Get Very Hot?

What is the lifespan of automotive lithium batteries?

How many items are there in express car repair services?