What are the reactions if the ball joint of the front lower arm of a car is broken
When the ball joint of the front lower arm of a car is damaged, the main manifestations are abnormal driving noise, body shaking, abnormal tire wear and steering deviation . Timely maintenance is required to ensure driving safety.
Youdaoplaceholder0 Core symptom manifestations
Youdaoplaceholder0 driving noise :
When driving on bumpy roads or turning, the chassis makes sharp abnormal noises such as "clunk" and "click", especially when passing over speed bumps or potholes.
When driving at high speed, the steering wheel shakes with abnormal noises, and the noise is more obvious when jolting.
Youdaoplaceholder0 body and tire anomaly :
The increase in the swing amplitude of the tires leads to uneven wear on the tread (such as one-sided wear), accompanied by rolling noise.
The stability of the vehicle body declines, with left and right swaying or overall shaking, especially more pronounced when driving at high speeds.
Youdaoplaceholder0 Direction control anomaly :
The play of the steering wheel has increased, the steering response is sluggish, and the direction needs to be corrected frequently to maintain straight driving.
The vehicle automatically veered off course. Even when the steering wheel was not turned, the body still shifted to one side.
Youdaoplaceholder0 Accompanying symptoms and severity
Youdaoplaceholder0 Minor damage (requires prompt repair) :
The abnormal noise only occurred on the bumpy road, and the direction slightly deviated.
The tires swayed slightly, and the signs of wear began to appear.
Youdaoplaceholder0 moderate damage (immediate repair) :
Frequent abnormal noises are accompanied by steering wheel shaking, and the shaking of the vehicle body affects driving comfort.
The tire wear has intensified, and the irregular wear of the tread is visible to the naked eye.
Youdaoplaceholder0 severe damage (driving prohibited) :
The ball head dust cover is cracked and the grease leaks, resulting in excessive clearance between components and posing a risk of steering failure.
On the bumpy road, the abnormal noise is intense and the vehicle's driving trajectory is difficult to control.
Youdaoplaceholder0 Cause of failure and maintenance suggestions
Youdaoplaceholder0 common causes :
Long-term wear and tear (generally requires inspection after driving 50,000 to 80,000 kilometers).
The dust cover is damaged, leading to lubrication failure or deformation due to external force impact.
Youdaoplaceholder0 repair suggestions :
When abnormal noises or deviation are detected, immediate inspection should be carried out to prevent further driving from accelerating wear and tear.
When replacing, it is recommended to choose original factory parts. After repair, the four-wheel alignment correction parameters need to be done.
To replace the ball joint of the front lower arm of a car, follow these steps:
Tool preparation
Jack, 21mm socket, 10mm socket, 18mm wrench, hammer, crowbar, etc.
Disassembly process
Youdaoplaceholder0 vehicle lift
Use a jack to safely lift the vehicle and make sure the wheels are off the ground.
Remove the tire and place it in a safe position.
Youdaoplaceholder0 Loosen the screw
Loosen the screws at the front end of the lower support arm with a 21mm sleeve (note to loosen in stages to avoid thread slippage).
Remove the balance bar screws with a 10mm sleeve (be sure to pay attention to the anti-slip nuts).
Loosen the screws at the rear end of the lower support arm with a 21mm socket (the nuts need to be fixed with a wrench).
Youdaoplaceholder0 separate ball head
Loosen the ball screw with an 18mm wrench until it is loose.
Strike the steering knuckle to separate the ball joint from the steering knuckle.
Completely remove the screws and use a crowbar to remove the old ball head.
Installation steps
Youdaoplaceholder0 install the new ball head
Align the new ball head with the position and make sure the direction is correct.
Youdaoplaceholder0 tighten the screws
Tighten all the screws in the reverse order to ensure that each screw is secure (note that the tightening force should be even).
Youdaoplaceholder0 lower the vehicle
Lower the vehicle slowly and check the fastening condition.
Youdaoplaceholder0 complete the installation of
Reinstall the tire and tighten the screws.
Youdaoplaceholder0 Precautions : Goggles and gloves must be worn during operation. If you are not familiar with the process, it is recommended to seek professional maintenance support.
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