Does a car purchased in 2015 need to undergo inspection in 2021?

What are the signs of poor tire grip?

Tire grip is primarily influenced by factors such as the tread pattern, tread depth, road surface conditions, and vehicle load. Weak adhesion between the tires and the road can lead to vehicle slippage. Improving grip can be achieved by increasing friction and expanding the contact area between the tires and the road. Below are specific methods to enhance tire grip: Increasing Friction: Enhance the road's friction coefficient, which refers to the road's ability to provide traction for the tires. A higher friction coefficient results in greater traction. Different road surfaces, such as asphalt, concrete, and gravel, have varying friction coefficients, each offering different levels of tire grip. Additionally, increasing the tire's own friction coefficient can be achieved by opting for softer tires. Softer tires provide stronger grip but tend to wear out faster. Expanding the Contact Area Between Tires and Road: The simplest method is to switch to wider tires. Another approach is to choose tires with fewer tread patterns, which increases the actual contact area between the tires and the ground. However, this may negatively affect grip performance on wet or slippery surfaces. Lastly, and most importantly, within a given contact area, optimizing tire pressure and precise suspension tuning can fully unleash the tire's potential.

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Does disassembling and cleaning the engine affect it?

Disassembling and cleaning the engine generally does not affect it. In automotive maintenance projects, engine cleaning is also a routine maintenance item. If the engine has been experiencing high fuel consumption or running less smoothly recently, cleaning the engine can be considered. However, if the engine has been running smoothly with normal fuel consumption, there is no need to clean it. The reasons why a car's engine needs cleaning are as follows: 1. Sludge formation: When a car is running, engine oil is needed for cooling and lubrication. Over time, the oil undergoes high temperatures, oxidation, and high pressure inside the engine, leading to the formation of impurities and sludge. Poor-quality oil or incomplete combustion can easily result in a large amount of carbon deposits. 2. Sludge and carbon deposit accumulation: The accumulation of these impurities, such as sludge or carbon deposits, can affect the engine's efficiency, leading to a reduction in engine power. The most direct impact is an increase in fuel consumption. 3. Oil pump blockage: If left untreated for a long time, not only will fuel consumption increase, but sludge can even clog the oil pump, causing engine damage. Moreover, when using poor-quality oil, acidic substances containing sulfur and phosphorus may form, which can corrode and damage the engine, affecting its lifespan.

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What is the replacement cycle for new car tires?

Under normal circumstances, the original tires can travel 60,000-80,000 kilometers or be used for 3-5 years. If driving for a long time on rugged and sandy roads, tires may need to be replaced before reaching 60,000 kilometers. At this point, due to severe tire wear, the tread friction coefficient decreases significantly, making it prone to slipping during continuous driving, which can lead to loss of vehicle control. Conditions requiring tire replacement: The lifespan of tires is related to many factors, such as vehicle model, load capacity, driving habits, and road conditions. Therefore, tires are equipped with wear indicators to determine their lifespan. This is a more economical and appropriate method to assess tire lifespan. Once the wear reaches or exceeds this indicator, the tire has reached the end of its lifecycle. Traction and friction will significantly decrease, affecting the car's braking and cornering performance. In such cases, the tires must be replaced. Another situation is that bulging tires should be replaced as much as possible. The structural integrity of a tire comes from its inner layers of nylon and steel wire interlaced fabric. When a tire is impacted by external forces, some of these fabric layers can be damaged. Without the restraint of these layers, the rubber tire body can easily bulge under high pressure. Such tires should be replaced as much as possible and can be used as spare tires.

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What Causes the Car's Anti-Skid Light to Illuminate?

The reasons for the car's anti-skid light to illuminate include the driver mistakenly turning off the ESP system, the electronic stability control system being deactivated; loose or faulty sensor connectors; short circuits or blown fuses; software issues causing poor signal transmission; ABS pump failure, etc. Solutions: Check if the car's ESP system is turned off, and if so, turn it back on promptly; ensure sensor connectors are securely fastened; replace blown fuses; address software issues by updating or upgrading at a 4S shop; ABS pump failures should be repaired at a professional service center. The vehicle's anti-skid system uses ABS and ASR electronic control units to calculate and analyze the wheel slip rate and driving speed based on signals from the wheel speed sensors. The electronic control unit adjusts the throttle opening and brake pressure to control the wheel slip rate, preventing the vehicle from skidding during driving. When a car skids, the driver should hold the steering wheel firmly, quickly determine the nature of the skid, and avoid panicking or steering blindly. If the skid is caused by poor road conditions, the driver should hold the steering wheel steady (with appropriate deceleration) and not forcefully steer in the opposite direction of the skid. If the skid is caused by braking, the driver should immediately release the brake.

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Does Engine Knocking Need Repair?

Engine knocking requires repair as it can cause certain damage to the engine. It may lead to decreased engine power, a sudden increase in fuel consumption, and in severe cases, deformation or damage to moving parts such as the cylinder walls, pistons, piston rings, valves, connecting rods, and their bearings. Timely repair is necessary. Methods to avoid engine knocking are as follows: 1. Avoid lugging the engine: Driving at high gear with low speed can easily increase engine load, thereby advancing the ignition timing. Since the engine is in a higher gear, the RPM increase is not significant, making knocking more likely to occur. 2. Regular maintenance: Regularly service at 4S shops, including cleaning the fuel system and injectors, removing engine carbon deposits, and changing engine oil, which are methods to maintain the engine in good condition. 3. Avoid overheating: Regularly check the coolant level, inspect and change the engine oil, avoid prolonged aggressive driving, and frequently monitor the water temperature during summer driving. 4. Use high-quality fuel additives appropriately: Some high-quality fuel additives available on the market can also help mitigate engine knocking to a certain extent.

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What Traffic Light Allows U-Turns?

As long as there is a U-turn sign at the intersection, you can make a U-turn when the light is green, provided it does not affect the movement of straight-going vehicles. Normal situations where U-turns are allowed: Dedicated U-turn lanes: At many road intersections, there are dedicated left-turn or U-turn lanes. In such cases, you need to signal your intention to turn and can make a U-turn without interfering with other vehicles. Areas without explicit prohibition of U-turns: While driving, if there is no explicit sign prohibiting U-turns, you can make a U-turn as long as it does not disrupt the normal flow of other vehicles. However, be cautious about crossing lines to avoid penalty points. Intersections with U-turn traffic lights: It is common to encounter intersections with dedicated U-turn signals. Follow the signal to make a U-turn, but ensure the light is green when turning left. Additionally, you must use the designated lane for U-turns; otherwise, it constitutes a traffic violation, which may result in fines and penalty points if caught on camera. U-turns allowed at yellow grid lines: Yellow grid lines indicate no stopping zones, usually placed at intersections prone to congestion due to temporary stops, such as near important institutions, government offices, or schools. Therefore, you can make a normal left-turn U-turn at yellow grid lines.

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Does a car purchased in 2015 need to undergo inspection in 2021?

What are the signs of poor tire grip?

Does disassembling and cleaning the engine affect it?

What is the replacement cycle for new car tires?

What Causes the Car's Anti-Skid Light to Illuminate?

Does Engine Knocking Need Repair?

What Traffic Light Allows U-Turns?

Which province does Jin O belong to?

How often should a sedan be started if it is not driven for a long time?

Does a Dashboard Mat Affect Airbag Deployment?

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