Are license plates different for front and rear installation?

What kind of engine oil is generally used for small cars?

Small cars generally use fully synthetic engine oil. Main characteristics of engine oil: Engine oils on the market can be simply divided into two types based on their base oil: mineral oil and synthetic oil (vegetable oil is not considered due to its scarce production). Synthetic oils are further divided into: fully synthetic and semi-synthetic. Lubricant base oils are mainly categorized into mineral base oils and synthetic base oils. Mineral base oils are widely used and consumed in large quantities, but some applications require products blended with synthetic base oils. Engine oil classification standards: 10W-40 is its SAE standard viscosity value. This viscosity value first indicates that the oil is a multi-grade oil. W stands for WINTER, and the number before W represents the oil's flow performance at low temperatures; the smaller the number, the better the starting performance at low temperatures. The number after W represents the oil's stability at high temperatures (i.e., the likelihood of thinning); the larger the number, the better the oil's stability at high temperatures.

20

2

Share

Is Engine Crankshaft Oil Seal Leakage a Major Issue?

Not a major issue, but it does have some impact. Valve oil seal leakage can accelerate oil consumption and cause blue smoke from the exhaust pipe, but it has little effect on engine power. The valve oil seal prevents oil from entering the intake and exhaust pipes, thereby avoiding oil loss. It also prevents the leakage of the air-fuel mixture and exhaust gases, and stops engine oil from entering the combustion chamber. Below is extended information about oil seals: Function: An oil seal is a mechanical component used to contain lubricants, commonly found in the bearing areas of various machinery. Its primary function is to isolate lubricated parts from the external environment, preventing lubricant leakage. It serves the dual purpose of sealing oil internally and keeping out dust externally. Materials: Modern oil seals are primarily made from various types of rubber, such as nitrile rubber, acrylic rubber, polyurethane rubber, silicone rubber, fluororubber, and polytetrafluoroethylene rubber. The typical structure of an oil seal is as shown in the figure below, offering advantages like simple design, lightweight, compact installation space, and ease of manufacturing.

5

4

Share

What is the charging power of a charging pile?

The charging power varies for different vehicle models. It is generally 160 or 240. Below is some information about the radiation from charging piles: Safety: The electromagnetic radiation generated by electrical appliances has no significant impact on the human body (the sunlight we see every day is a form of electromagnetic radiation), as the intensity of electromagnetic radiation is limited by safety standards. Ionizing radiation has a greater impact on humans (such as what is commonly referred to as nuclear radiation), but it also naturally exists at a certain intensity, and there is no need to worry about it in normal life. Radiation intensity: First, let's look at the national standard regulations. For low frequencies between 1-8 Hz, the permitted public exposure values are: electric field strength of 8000V/m and magnetic field strength of 500A/m, meaning that any intensity below these values is considered acceptable. Taking the commonly used Guoxuan lithium-powered buses and BYD K-series electric buses as examples, the measured electric field strength is 1-2V/m, and the magnetic field strength is 2-4A/m. When the vehicle speed exceeds 40km/h, the electric field strength inside the cabin is below 1A/m, and the magnetic field strength is below 0.05A/m. These values are so small that they can be considered negligible, far lower than those of a typical smartphone.

10

0

Share

Is There Warranty for Brake Discs at 4S Stores?

Brake discs are covered by warranty, typically for 12 months or 60,000 kilometers. Of course, the warranty period varies for different car brands. More details are as follows: Importance of Brake Discs: Good brake discs provide stable braking, no noise, and no vibration. The material of the brake discs conforms to China's gray cast iron 250 standard, abbreviated as HT250, which is equivalent to the American G3000 standard. Factors Affecting Brake Discs: Brake discs are cast products. Due to climatic factors—extreme cold in the north and extreme heat in the south—most brake disc production bases are located in the latitude regions of Shandong, Hebei, and Shanxi in China. Currently, there are disc brakes and drum brakes. Older vehicles often have disc brakes in the front and drum brakes in the rear. Many vehicles now have disc brakes on both front and rear wheels. Because disc brakes dissipate heat better than drum brakes, they are less prone to thermal fade during high-speed braking, resulting in better high-speed braking performance.

12

5

Share

Do I need to go in person for the license plate registration?

New car license plate registration can be handled by someone else, as long as the ID card provided by the owner matches the name and ID on the invoice of the car purchaser. Notes for new car license plate registration: Exempted vehicle models: Although imported motor vehicles and some domestic cars, small and mini passenger vehicles have been included in the exemption scope, the number of exempted domestic car models is relatively small. After the implementation of the new policy, all domestic cars can be exempted. The exemption scope for new cars includes sedans and small, mini passenger vehicles and two-wheeled motorcycles marked with "new car exempted." Exempted vehicle models do not include: Exempted vehicle models do not include off-road vehicles, small and mini ordinary passenger vehicles, and medium and heavy-duty trucks. Exemption does not mean direct license plate registration: Exemption for new cars does not mean you can directly go for license plate registration. Currently, it only exempts some items from the on-site inspection. New cars still need to undergo appearance inspection, photo-taking, and number stamping at the inspection site before license plate registration. Additionally, the exhaust emission test required for environmental protection purposes must still be conducted.

6

5

Share

What does the sound of metal hitting from a motorcycle chain indicate?

The sound is caused by either an overly tight chain or increased pitch due to chain wear, leading to poor engagement with the sprocket. If it's the latter, replace both the sprockets and the chain, and ensure proper lubrication. Break-in period precautions: Do not allow the motorcycle to idle during the break-in period; avoid revving the engine excessively, keeping the RPM below 5000; maintain speed under 50 mph; minimize the use of gears 1-3, favoring gears 4-5 instead, and shift frequently. Downshift early when climbing hills; try to avoid carrying passengers or heavy loads (preferably not exceeding 100 lbs); to protect the battery's lifespan, do not turn off the engine during nighttime use; perform frequent checks and maintenance, and address minor issues promptly. If any problems arise, visit the local after-sales service department for inspection; replace the specified original engine oil at 500 km, 1000 km, 1500 km, and 2000 km intervals. After that, replace the oil every 3000 km based on specific conditions; clean the air filter around 1000 km. Poor fit between the chain and sprocket: Replace the entire chain and sprocket set.

20

3

Share

Are license plates different for front and rear installation?

What kind of engine oil is generally used for small cars?

Is Engine Crankshaft Oil Seal Leakage a Major Issue?

What is the charging power of a charging pile?

Is There Warranty for Brake Discs at 4S Stores?

Do I need to go in person for the license plate registration?

What does the sound of metal hitting from a motorcycle chain indicate?

How to Solve the Brake Squealing Issue in Golf?

What are the precautions for novice car refueling?

Does aggressive driving affect the transmission?

How to Remove the Radio in a Chevrolet Sail?