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How to Determine the Quality of Shock Absorbers?

1 Answers
GavinLee
07/29/25 5:13pm
Shock absorber performance can be evaluated based on four aspects: temperature inspection, oil leakage observation, ride feel, and individual testing. Shock absorbers are vulnerable components during vehicle use, and their quality directly affects the driving smoothness and the lifespan of other mechanical parts. Therefore, it is essential to keep shock absorbers in good working condition. Below are detailed methods for evaluation: 1. Temperature Inspection: After driving the vehicle for 10 kilometers on rough road conditions, stop and touch the shock absorber housing. If it is not sufficiently hot, it indicates that there is no internal resistance, meaning the shock absorber is not functioning. 2. Oil Leakage Observation: During operation, high-temperature oil vapor from the shock absorber often adheres to the cylinder wall, and road dust accumulates on it, forming a layer of sludge. This is normal and not caused by oil leakage. However, if there is not only sludge but also oil stains or droplets on the cylinder wall and lower mounting ring, it indicates oil leakage. 3. Ride Feel: Normally, when the vehicle passes over a bump or pothole at a moderate speed, the body will inevitably experience jolts and vibrations. If the shock absorber is faulty or the springs are too soft, the amplitude of the vibrations will be larger. If the vibrations persist for an extended period, it suggests that the shock absorber's damping performance has degraded or failed. Otherwise, it is functioning normally. 4. Individual Testing: Remove the shock absorber from the vehicle, stand it upright, and clamp the lower connecting ring in a vise. Pull and press the shock absorber rod several times. There should be stable resistance, with the resistance during upward pull being greater than during downward press. If the resistance is unstable or absent, it may indicate insufficient oil inside the shock absorber or damaged valve components, requiring repair or replacement.
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Is It Safe to Sit in a Car During a Thunderstorm?

It is safe to stay in the car during a thunderstorm. The reasons are explained in detail below: 1. The principle used for lightning protection is equipotential bonding: This means connecting metal objects with wires or other metal objects. When a high-voltage lightning strike occurs, the potential of the metal objects becomes approximately equal, preventing the formation of a potential difference and thus no current flows. 2. It is very safe to be in the car during a thunderstorm: Because the metal shell of the car forms an equipotential surface, the potential of the people inside the car and the car itself is roughly equal. When lightning occurs, no current will be conducted to the people inside the car. Therefore, it is safe to be inside the car during a thunderstorm. 3. The car is a metal object: However, its enclosed structure makes it a 'Faraday cage.' The wet tires serve as the key component connecting the car body to the ground for conduction. Even if the car is struck by lightning, the current can pass through the car's outer shell and tires to the ground, causing no harm to the occupants inside.
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What Are the Reasons for the Car Radar Not Beeping?

The reasons for the reversing radar not beeping are as follows: 1. The reversing radar switch is turned off: Most cars have a control switch for the reversing radar on the central control panel inside the vehicle. If it is turned off, the reversing radar will not work. Solution: Turn on the reversing radar switch. 2. Reversing radar circuit failure: When the reversing radar circuit ages or breaks, the reversing radar will not function properly. 3. Check if there is current in the main unit's power line: When you find that the reversing radar is not beeping, first check if the main unit's power line is properly connected and if there is current; then check if the radar main unit line is loose. If neither of these is the issue, the problem may lie with the radar itself. 4. Buzzer damage: If the problem is confirmed to be with the reversing radar, the first possibility to consider is that the buzzer is damaged. In this case, you need to purchase a new buzzer and install it; additionally, recall if your car has undergone any recent modifications. If so, it is possible that the reversing radar circuit was damaged during the modification process, and you will need to take the car to a repair shop or 4S store for inspection. 5. Check if the circuit connection at the bumper is intact: When you find that the reversing radar is not beeping, you can also check if the circuit connection at the bumper is intact, then check if the reversing light turns on when you shift into reverse. If it doesn't, check if the reversing light's connection switch is damaged. Also, check if the computer displays any fault codes. If none of these issues are present, inspect the reversing radar itself for any problems.
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How to Deal with Faded and Dull Black Car Paint?

Glazing is an ideal method to restore faded and dull black car paint. The principle involves applying a glaze to the car body, which fills in the cracks on the paint surface, thereby restoring the paint's shine. After glazing, the car's glossiness can even surpass that of the original factory paint. Additionally, the glaze has characteristics such as high-temperature resistance, water resistance, corrosion resistance, and good sealing properties, allowing the effects to last for a relatively long time. More related information is as follows: 1. When the car paint is faded and dull: Many people opt for cheaper solutions like polishing and waxing. Although polishing and waxing are inexpensive, their effects are not as good as glazing. 2. Polishing: This involves fine grinding of the paint surface to remove the aged parts of the paint, followed by applying a clear coat to enhance glossiness. However, since there is no protective layer on the exterior after polishing, the effects do not last long. Moreover, polishing affects the thickness of the clear coat and can cause some damage to the paint. Excessive polishing can lead to the clear coat being worn through, so it's best to limit polishing to no more than five times. 3. Waxing: The process of waxing is similar to glazing in principle, but the effects differ significantly. Since wax is an oily substance, it can be quickly washed away by water. Unlike glazing, waxing does not offer high-temperature resistance, water resistance, corrosion resistance, or good sealing properties, resulting in shorter-lasting effects.
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How to Handle Leaving the Scene After a Minor Vehicle Collision?

If a minor vehicle collision occurs and the driver fails to immediately report the accident or stop to handle the situation after becoming aware of the incident, it is considered hit-and-run. Based on the description, this behavior already constitutes hit-and-run. To prove that one did not commit hit-and-run, it is necessary to demonstrate that the driver left the scene unknowingly, primarily proving that the departure was not to evade legal responsibility. More relevant information is as follows: 1. "Road Traffic Safety Law of the People's Republic of China": Article 70 states that in the event of a traffic accident on the road, the driver must immediately stop the vehicle and protect the scene; if there are casualties, the driver must immediately rescue the injured and promptly report to the traffic police on duty or the traffic management department of the public security organ. If the scene is altered due to rescuing the injured, the positions should be marked. Passengers, drivers of passing vehicles, and pedestrians should assist. 2. No casualties: In the event of a traffic accident on the road that does not result in casualties, and if the parties involved have no disputes over the facts and causes, they may leave the scene immediately, restore traffic, and negotiate compensation for damages on their own; if they do not leave the scene immediately, they should promptly report to the traffic police on duty or the traffic management department of the public security organ. In the event of a traffic accident on the road that only causes minor property damage and the basic facts are clear, the parties involved should first leave the scene and then negotiate the settlement.
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What are the causes of a broken car driveshaft?

The causes of a broken car driveshaft include: the dynamic balance of the driveshaft assembly exceeding standard specifications; loose or damaged driveshaft connecting bolts; failure to strictly follow repair process operating procedures during maintenance operations; improper driving operation, causing the driveshaft to suffer severe impacts leading to component damage. Below are the effects and preventive measures for driveshaft breakage: Effects of driveshaft breakage: The car driveshaft is a crucial component that transmits power from the transmission to the rear axle. If it breaks or detaches during use, it can easily overturn the vehicle, leading to serious safety consequences. Additionally, there may be impact noises from the driveshaft when starting the car or during gear shifting while driving, especially more noticeable when driving at low speeds in high gear. There may be no abnormal noise from the driveshaft when starting the car, but impact sounds may occur while driving. Preventive measures for driveshaft breakage: Strictly adhere to technical specifications for regular maintenance to ensure that related components are securely fastened and well-lubricated; strictly follow maintenance standards, using a dial indicator on V-blocks to measure driveshaft bending during repairs, correcting if it exceeds 0.5mm; promptly replace worn-out universal joints, bearings, and other transmission components; regularly lubricate the intermediate bearing, ensuring the bearing cap is installed with appropriate tightness and adjusting as needed during use; practice smooth starting and shifting while driving, and use the clutch and brake properly to reduce the impact force generated during power transmission.
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Will leaving a car parked for a month without driving affect it?

Yes, it will have an impact. Prolonged parking of a vehicle can cause tire deformation, resulting in noticeable rolling impacts when the car is started again. Additionally, the battery will suffer severe depletion. When the battery's self-discharge reaches a certain level, prolonged undercharging can lead to sulfation of the battery plates, shortening its lifespan. It is recommended to start the vehicle at least once a week. More relevant information is as follows: 1. Parking location selection: It is best to store the car in a garage. If parking outdoors, use a car cover if possible, or at least park in a shaded or covered area to avoid sun, rain, and damage from fallen leaves and other debris to the paint. 2. Do not engage the handbrake: For long-term parking, the brake system can easily react with moisture and oxygen in the air, leading to rust on the brake discs and pads. If they stick together, it may cause the wheels to lock. 3. Car battery: Even when not in use, the battery discharges on its own. Typically, a battery can be fully discharged in about three months. Therefore, it is advisable to disconnect the battery if the car will not be used for an extended period, as the car's electronics will still consume power. Otherwise, after about 20 days, you may need to seek a repair shop or another car for a jump-start. 4. Check the tire pressure of all four tires: Before using the car after long-term parking, check the tire pressure of all four tires to ensure it is normal and that there are no leaks.
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