What is the difference between 21-inch tires and 20-inch tires?

Do I Need Wheel Balancing and Four-Wheel Alignment After Changing Tires?

When replacing tires or repairing punctures, as long as the tire is removed from the wheel hub and then reinstalled, wheel balancing is necessary. Failure to perform wheel balancing can cause noticeable tire bouncing at certain speeds. However, neither tire replacement nor puncture repair requires a four-wheel alignment. Four-wheel alignment is only needed when the vehicle experiences issues such as pulling to one side, severe uneven tire wear, or tire cupping. Four-wheel alignment is unrelated to tire replacement. The reasons why a vehicle needs wheel balancing are as follows: 1. A car's wheel is an assembly consisting of a tire and a wheel hub. However, due to manufacturing variations, the mass distribution of this assembly cannot be perfectly uniform. When the car's wheels rotate at high speeds, this can lead to dynamic imbalance, causing wheel wobble and steering wheel vibration during driving. 2. To prevent or correct this phenomenon, weights are added to the wheel while it is in motion to balance the edges. This correction process is commonly known as wheel balancing, which involves attaching balancing weights. These weights are made of lead alloy and are measured in grams, such as 5g, 10g, or 15g. Although they may seem small, they generate significant centrifugal force when the wheel rotates at high speeds. Each balancing weight has a steel hook that clips onto the edge of the wheel rim.

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What to Do When the Car Shakes Violently in Reverse Gear?

Severe shaking when engaging reverse gear in a car is generally caused by the absence of a synchronizer in the reverse gear of the driven vehicle. The following methods can be referenced: 1. Come to a complete stop before shifting. Most family cars do not have a synchronizer in reverse gear, so if you shift into reverse without stopping the car completely, gear grinding is inevitable. Therefore, when shifting into reverse, make sure to press the brake firmly and bring the car to a complete stop before shifting. 2. Depress the clutch fully. When shifting gears and pressing the clutch, ensure the clutch is fully depressed. Never shift into reverse with the clutch partially engaged, as this can also cause gear grinding. 3. Reverse slowly. Do not reverse too quickly, and avoid pressing the accelerator hard for rapid acceleration in reverse, as this can cause significant damage to the straight-cut gears. Additionally, the transmission of straight-cut gears is very direct and lacks smoothness, so reversing quickly can make passengers feel very uncomfortable. 4. If the problem persists after following the above steps, it is recommended to seek professional assistance.

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How to Clean Carbon Deposits in Direct Injection Engines?

Here are the specific methods for cleaning carbon deposits in direct injection engines: 1. Add a carbon deposit cleaner. This cleans the carbon deposits in the entire combustion system. The advantage is that it is convenient for individuals to do, but the cleaning is not thorough. 2. Use an engine carbon cleaning kit. This method involves introducing a cleaning solution into the engine through a tube to clean carbon deposits, commonly referred to in the industry as "hanging an IV." 3. Drive at high speeds. Whether during the break-in period of a new car or when frequently driving in congested urban areas, it is very necessary to drive at high speeds occasionally, which helps clean carbon deposits. 4. Disassemble and clean the engine. This requires strong professional technical skills. While it is thorough, disassembling the engine for cleaning is not recommended unless under special circumstances.

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Can You Still Drive with a Sensor Malfunction?

Sensor malfunction car can still be driven, but this will exacerbate transmission damage. Below are the relevant explanations for automobile sensor malfunctions: 1. If the sensor malfunctions and there are no abnormal noises in the engine compartment, no other abnormal prompts on the dashboard, the vehicle's power is not affected, and the transmission's gear shifting is not impacted, you can continue driving to the 4S shop for further inspection. This is because issues like intake and exhaust can also trigger the engine fault light, requiring specific analysis for specific problems. 2. As long as the engine power and sound do not show any special abnormalities, the vehicle can still continue to be driven, as the ECU has a program to substitute for errors. 3. Once among the many sensors, one sensor experiences a sensing failure, to ensure the engine operates normally, the ECU will use preset backup parameters to replace the faulty sensor's parameters, preventing the vehicle from breaking down.

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What are the differences between 5W and 10W engine oils?

5W and 10W refer to low-temperature viscosity, and the smaller the number before the W, the better the low-temperature fluidity of the engine oil, the lower the minimum temperature it can adapt to, and the stronger its cold resistance. Therefore, there are two main differences between 5W and 10W engine oils: 1. 5W engine oil has better low-temperature fluidity than 10W, making it easier to start in low-temperature environments. 2. 5W engine oil can be used at a minimum temperature of -30°C, while 10W can only be used at a minimum temperature of -25°C. 5W engine oil has stronger cold resistance than 10W. Here’s how to specifically choose the right engine oil type: 1. For normal driving conditions, such as in Japanese cars, 0W20 is sufficient. In higher climate temperatures, switching to 0W30 or even 0W40 is enough, as Japanese cars require engine oil with sufficient fluidity. 2. For current German and European car engines, all-season engine oils can be used universally. Common 5W30 can basically meet the needs, and 5W40 is generally suitable for domestic environments.

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How to Turn on the Hazard Lights in a Car?

The hazard light switch is an independent switch located on the car's control panel, typically marked by a red triangle. Pressing this switch once will turn on the hazard lights, also commonly referred to as emergency flashers. These lights serve as a signal to alert other vehicles and pedestrians that the car is experiencing a special situation, prompting them to yield or avoid the vehicle promptly. Additional Information: As a signal light, the use of hazard lights is strictly regulated. Misuse or failure to use them when required may result in fines. Therefore, it is essential to understand when to turn on the hazard lights and when not to. The usage of hazard lights can be summarized in one sentence: if you need other vehicles to slow down or even stop to yield while driving, you should typically turn on the hazard lights. Precautions for using hazard lights are as follows: 1. In case of brake failure while driving: If the vehicle cannot be stopped quickly and effectively, immediately turn on the headlights along with the hazard warning lights to alert nearby vehicles and pedestrians. Continuously honk the horn to draw attention and take necessary actions such as downshifting or other safety measures. 2. When temporarily parked on the road: When temporarily parked, especially on non-motorized lanes or when borrowing a lane, immediately turn on the hazard warning lights to alert passing vehicles and pedestrians. The driver should not leave the vehicle casually. 3. In the event of a traffic accident: If the vehicle is involved in an accident, immediately turn on the hazard warning lights to alert others, and promptly call for help or report to the authorities while waiting for rescue or further handling.

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What is the difference between 21-inch tires and 20-inch tires?

Do I Need Wheel Balancing and Four-Wheel Alignment After Changing Tires?

What to Do When the Car Shakes Violently in Reverse Gear?

How to Clean Carbon Deposits in Direct Injection Engines?

Can You Still Drive with a Sensor Malfunction?

What are the differences between 5W and 10W engine oils?

How to Turn on the Hazard Lights in a Car?

How Long is the Warranty Period for Changan Automobiles?

What do T, L, G, and E in car models represent?

Why is the steering wheel shaking?

What are the dimensions of the Sienna?