What is the grille at the front of a car?

Should the Yellow and Red Dots on Tires Face Outward?

The hollow yellow dot indicates the position with the least longitudinal vibration of the tire, while the solid red dot indicates the position with the greatest longitudinal vibration. When installing tires, the yellow and red dots on the tire should face outward. Below is more information about tire replacement: 1. The side that needs to face outward will be marked with 'outside.' The position with the yellow dot is the lightest part of the tire, while the position with the red dot indicates the heaviest part. 2. After replacing the tires, it is necessary to rebalance all four wheels. Otherwise, the wheels may vibrate at high speeds. When performing wheel balancing, always choose a professional shop with specialized equipment and trained personnel. 3. For wheel alignment, it is also essential to select a professional shop with the right equipment and expertise. Incorrect wheel alignment data can lead to uneven tire wear or vehicle misalignment. 4. When using a tire mounting machine to install tires, apply lubricant to the tire.

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Do All Four Tires Need to Be Replaced at the Same Time?

Under normal circumstances, it is better to replace all four tires together for the following reasons: 1. Different tire tread patterns can result in varying levels of traction, affecting the vehicle's grip. Having the same tread pattern on all four tires ensures consistent traction across all wheels. If tires with different tread patterns must be used together, ensure that tires with the same pattern and similar wear are placed on the same axle to avoid performance issues caused by uneven traction. 2. If tires on the same vehicle are rotated regularly, their wear levels should be similar. If one tire becomes unusable, the others are likely in the same condition. 3. Tires have a limited lifespan, typically up to six years. Beyond this period, the risk of tire blowouts increases significantly. Therefore, even if some tires still have good tread, they should be replaced after six years. (Note: If a tire is damaged due to impact, one or two tires can be replaced individually, but ensure that tires on the same axle have matching tread patterns.)

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How to Check the Deadline for Learning to Drive?

Log in to your account on the 12123 official website, navigate to the driver's license services section, and find the option to print the learning to drive certificate. Click on it to view the deadline on the new page. Here are the specific details about the learning to drive certificate: 1. Validity Period: The learning to drive certificate is valid for three years. Applicants must complete the subject two and subject three tests within this period. If the tests are not completed within the validity period, the passed subjects will be invalidated. 2. Certificate Format: The learning to drive certificate can be in either paper or electronic form, both of which hold the same legal effect. Applicants can print or download the learning to drive certificate through the internet traffic safety comprehensive service management platform. When learning to drive on the road, the learning to drive certificate must be carried at all times.

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What are the reasons why a van has electricity and fuel but won't start?

Here are the specific reasons why a van has electricity and fuel but won't start: 1. Partial failure of the ignition wires: The reason why a car has electricity and fuel but won't start may be due to issues with the ignition wires, such as aging wires, incorrect cylinder wire sequence, damaged distributor, or loose spark plug caps. When starting the engine, if there is a clear sound of the starter working, it indicates that the power supply is not a problem and the starter is functioning properly. The issue might be a blocked fuel line, preventing proper fuel supply. 2. Incorrect car gear position: An incorrect gear position can also prevent the car from starting. Generally, the P or N gear is the correct starting position for an automatic transmission car. If the gear is in R or another position, not only will the car fail to start, but there will also be certain safety hazards. Carefully check if the gear position is correct. Once an incorrect gear position is found, adjust it to the correct position before attempting to start the vehicle.

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What is the difference between A maintenance and B maintenance?

Here are the specific differences between A maintenance and B maintenance: 1. Maintenance items: A maintenance includes simple inspection, computer connection check, and oil and oil filter replacement; B maintenance involves more in-depth inspections than A maintenance, such as removing tires to measure brake disc thickness, etc. In addition to the contents of A maintenance, B maintenance also includes replacing the air filter and cabin air filter. 2. Maintenance categories: A maintenance includes engine oil, oil filter, lubrication maintenance, windshield washer fluid top-up, full vehicle fluid inspection, computer diagnostics, drainage check, tire tightening, tire pressure (5 tires), chassis inspection (suspension, brake discs, pads, and all chassis components), interior inspection (horn, headlight washer, seat belts, interior lights, cigarette lighter, and all functions), battery test, and resetting maintenance and tire pressure warning lights; B maintenance includes adding air filter replacement, cabin air filter replacement, air conditioning sterilization, sunroof lubrication, intake manifold, throttle, and fuel injector cleaning without disassembly, plus all the items included in A maintenance.

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What Causes High Engine RPM When Going Downhill?

High engine RPM when going downhill is caused by the following reasons: Driving from a higher to a lower elevation gives the vehicle potential energy due to gravitational acceleration. Even without pressing the accelerator, the vehicle will accelerate when going downhill. However, the engine's reverse traction force will slow the vehicle down. When the slope is steep, the gravitational acceleration acting on the vehicle will exceed the engine's reverse traction force in the current gear, causing the RPM to rise. Precautions when going downhill: 1. Do not rely solely on low gear to control speed. To avoid overheating the brake pads from prolonged braking, engine braking is used, but this does not mean you should not use the brakes at all. Even if the gear is fixed in a low position, if the slope is steep and long, the engine RPM may still be forced to increase. In such cases, you should use the brakes to assist in slowing down. 2. Engine braking methods for automatic transmissions. For automatic transmissions, engine braking requires shifting to L (Low) or S (Sport) mode in manual mode to fully utilize engine braking for speed control.

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What is the grille at the front of a car?

Should the Yellow and Red Dots on Tires Face Outward?

Do All Four Tires Need to Be Replaced at the Same Time?

How to Check the Deadline for Learning to Drive?

What are the reasons why a van has electricity and fuel but won't start?

What is the difference between A maintenance and B maintenance?

What Causes High Engine RPM When Going Downhill?

Why is it mandatory for trucks to install BeiDou and what are its functions?

Why was the Lavida Pure Electric discontinued?

What is the process for B2 point deduction review education?

How to Determine Which National Emission Standard Your Vehicle Meets?