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Can Long Scratches on the Windshield Be Repaired?

1 Answers
OAlice
07/30/25 12:19am
Repairing long scratches on the windshield is relatively difficult due to the following reasons: Polishing: Ordinary scratch wax cannot remove them; specialized glass polishing paste is required. However, polishing carries certain risks because the continuous friction between the polishing pad and the glass generates high temperatures. If the temperature exceeds the glass's tolerance, the glass may crack. Resin Application: Using resin with a refractive index close to that of glass is an emergency solution, but it can only be used to repair very small pits. The drawbacks of resin are also quite evident. Since its hardness is lower than that of glass, scratches will eventually reappear after prolonged use.
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More Forum Discussions

Should You Press the Clutch and Brake When Starting the Car?

When starting the car, it is necessary to press the clutch and brake to ensure a smooth ignition. Below are the specific introductions to the brake and clutch: 1. Brake: The car's brake pedal is located under the steering wheel. Pressing the brake pedal causes the brake lever to be pressurized and transmitted to the brake pads on the brake drum, which then clamp the brake disc, slowing down or stopping the car. 2. Clutch: The clutch is located in the flywheel housing between the engine and the transmission. The clutch assembly is fixed to the rear plane of the flywheel with screws, and the output shaft of the clutch is the input shaft of the transmission. While driving, the driver can press or release the clutch pedal as needed to temporarily separate or gradually engage the engine and the transmission, thereby cutting off or transmitting the power from the engine to the transmission.
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What is the transmission oil model for the new Alto?

The new Alto has different models. For automatic transmissions, use automatic transmission fluid (ATF), and for manual transmissions, use gear oil. Hazards of not changing transmission oil: 1. Damage to the transmission's shift control mechanism; 2. Abnormal wear of gears and clutch plates inside the transmission; 3. Affects the normal operation of the transmission, leading to damage to the transmission valve body. Transmission oil is different from engine oil. Although both oils serve a lubricating function, their specific roles differ and should not be confused. Differences: Engine oil is a lubricant for the engine system, possessing properties such as oxidation resistance, anti-wear, and anti-corrosion. Transmission oil, on the other hand, is primarily used to keep the shift system clean and extend the service life of internal transmission components. Due to the different structures and operating environments of the transmission and engine, transmission oil cannot be used as engine oil, nor can engine oil be used as transmission oil.
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What Causes the Noise from the Rear Axle of a Honda CR-V 4WD When Turning?

The noise during turning is caused by the steering resistance pump reaching its limit. Here are the specific details: 1. Tire Usage: If abnormal noises come from the chassis while driving, it is necessary to have it inspected and corrected at a 4S shop. When car tires come into contact with the ground, they produce various levels of noise due to the type or unevenness of the road, the vehicle's speed, the type of tires, and the tire's own air pressure. No matter how perfect the car is, it cannot completely eliminate the noise generated between the tires and the ground during driving. It is necessary to check whether the tire screws are tightened to eliminate the noise symptoms. 2. Vibration Situation: Check whether components such as the tie rod ball joint, swing arm bushings, or planar pressure bearings are loose. In addition, issues like front wheel toe-in, wheel hub bearings, and shock absorbers can also cause noise and vibration. Specifically, the front suspension and related parts need to be inspected.
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What are the functions of the four modes on the BMW S1000RR?

Rain mode can output 150 horsepower, Sport mode increases the output to 193 horsepower, Race mode is the track mode that allows the S1000RR to deliver 100% of its power, and Slick mode is also a racing mode which requires a calculator to unlock and is more aggressive than the previous three modes. Here are the relevant details: Introduction: The BMW S1000RR is a superbike, with the first model released in 2009. It is equipped with a four-stroke inline four-cylinder water-cooled engine, with a total displacement of 999cc, delivering a maximum of 193 horsepower at 13,000 rpm and a maximum torque of 112Nm at 9,750 rpm. Review: Overall, the performance of the RR is excellent, with smooth operation in all aspects. As a new bike, it runs smoothly even without being fully broken in.
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What is the model number of the transmission oil used in the new Alto?

There are different models of the new Alto, with automatic transmissions using shift oil (ATF) and manual transmissions using gear oil. Hazards of not changing transmission oil: 1. Damage to the transmission's shift control mechanism; 2. Abnormal wear of gears and clutch plates inside the transmission; 3. Affects the normal operation of the transmission, leading to damage to the transmission valve body. Transmission oil is different from engine oil. Although both oils serve a lubricating function, they have different effects and should not be confused. Differences: Engine oil is a lubricant for the engine system, with properties such as oxidation resistance, wear resistance, and corrosion prevention, while transmission oil is mainly used to keep the shift system clean and extend the service life of internal transmission components. Because the structure and operating environment of the transmission and engine are different, transmission oil cannot be used as engine oil, and engine oil cannot be used as transmission oil.
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What does 10w40 engine oil mean?

Synthetic engine oil 10w-40 refers to the SAE standard viscosity value of the oil. The "W" stands for winter, and 10W represents resistance to external low temperatures of -25°C. Below is a detailed introduction to the types of engine oil models: 1. High-temperature type (such as SAE20-SAE50): The number indicates the viscosity at 100°C, with higher numbers representing higher viscosity. 2. Low-temperature type (such as SAEOW-SAE25W): W indicates it is only for winter use, and the smaller the number, the lower the viscosity and the better the low-temperature fluidity. 3. All-season type (such as SAE15W/40, 10W/40, 5W/50): Indicates that the viscosity grade at low temperatures meets the requirements of SAE15W, 10W, and 5W respectively, and the viscosity grade at high temperatures meets the requirements of SAE40 and 50 respectively, making it suitable for both winter and summer use.
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