What are the symptoms of broken car shock absorber top glue?

The old car's chassis creaks? Maybe the shock absorber top rubber is at fault! Passing over speed bumps feels like a can is stuffed in, the steering wheel shakes like a mobile phone, and the tires are strangely worn. What's even more dangerous is that the brakes become soft, the corners become floaty, and the palms of the hands sweat on rainy days. Changing the top rubber, the old car actually regained the tension of the new car 1¡¢ Common manifestations of automotive shock absorber top rubber failure I always feel a creaking noise coming from the chassis when driving, especially when passing over speed bumps or bumpy roads. This sound is like metal rubbing against rubber. My own old car had this problem last year. The repairman said that it was caused by a direct collision between the metal components of the shock absorber upper seat after the top rubber hardened and cracked. Once when I was driving a friend over a speed bump in a residential area, he directly asked me if there was an empty can in the trunk. The steering wheel will have a slight bounce when turning at low speeds, which is more pronounced when driving on rough roads. According to statistics from a certain repair shop, 60% of cars with top glue faults will experience this abnormal vibration. It's actually a bit like a phone with vibration mode turned on and placed on the steering wheel, but I can't pinpoint the exact location. Last time I did four-wheel alignment, the master pointed to the cracked black rubber block and showed it to me, only then did I understand that it was causing trouble. 2¡¢ Hidden symptoms that are not easily detected The tire shows irregular uneven wear, especially the inner tread wears faster than the outer tread. During a tire change, my younger brother reminded me, 'Your right front wheel is a bit worn out.' Later, upon inspection, it was discovered that the shock absorber top rubber had deformed, causing the wheel alignment parameters to deviate. I have a vague understanding of the specific principle, as if the suspension geometry angle has changed? 3¡¢ The chain reaction caused by the malfunction The braking distance feels longer, especially after rainy days when the wheels are prone to slipping. The maintenance manual states that damage to the top rubber will prevent the shock absorber from quickly rebounding, but my most intuitive feeling during daily driving is that when I brake abruptly at a red light, the front of the car nods much more dramatically than before, like diving on a pirate ship. There is data indicating that suspension failure can increase braking distance by 5% -8%, but the specific source cannot be remembered. The chassis feels increasingly loose, and when passing over the manhole cover, you can hear a "clanging" sound of metal impact. The biggest headache is that it is difficult to locate the location of the abnormal noise. At first, I thought it was a problem with the rubber sleeve of the balance bar, so I replaced the parts for nothing. Mr. Wang from the repair shop later taught a simple method: had someone press the engine hood outside the car, and I listened to the sound source in the driver's cabin to identify the fault point. After replacing the roof sealant, the old car surprisingly regained some of the tension of the new car, although it may only be a psychological effect.

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