What is the rear shock absorber core
The rear shock absorber core is the core component of a car's rear shock absorber, mainly composed of springs, dampers, brackets, gaskets, spring seats, bottom covers, etc. Its function is to absorb the vibrations and shocks during vehicle operation through elastic deformation, thereby enhancing driving stability and comfort.
Core function
Youdaoplaceholder0 Absorbing vibration : The spring absorbs the impact of the road surface through elastic deformation, reducing the shaking of the vehicle body.
Youdaoplaceholder0 Suppress oscillation : The damper uses the movement of the piston to compress the damping oil to generate resistance, further suppressing the repeated jumping of the spring.
Youdaoplaceholder0 Structural support : The bracket connects the chassis to the body to ensure the stability of the components.
Precautions
If the spring is replaced alone, it may cause abnormal wear of the piston rod and oil seal, as the spring of some models needs to be designed with an eccentric structure to balance the lateral force.
The rear shock absorber core is the core component of the shock absorber, and its main functions include:
Absorb vibration and shock
By compressing or expanding the internal liquid or gas, the impact from the road surface is converted into heat energy, reducing the bumpy feeling of the vehicle body.
Delay the spring rebound
Suppress the rapid rebound after spring compression, balance the vehicle body posture, and enhance driving stability and comfort.
Protect vehicle components
Reduce the impact force on the chassis and suspension system, extend their service life, and lower the risk of component wear.
Maintain dynamic stability
Keep the vehicle balanced when braking or accelerating, prevent excessive nodding or lifting of the head, and ensure handling safety.
Detection method
After pressing the trunk, observe the rebound period (normal ≤3 vibrations), and check the oil stain condition to determine the state of the shock absorber.
The rear shock absorber core failure of Subaru Forester may be caused by various reasons. The following are common causes and their handling methods:
The shock absorber has failed or been damaged
Long-term use or external impact may cause shock absorbers to wear out, age or leak oil. Damaged parts need to be inspected and replaced.
Seal problem
The rupture of the oil seal gasket or the sealing gasket can cause oil leakage, affecting the normal compression of the shock absorber. The sealing parts need to be replaced.
Abnormality of mechanical components
Excessive clearance between the piston and the cylinder barrel, bending of the piston connecting rod or surface scratches require professional maintenance.
Assistance system issue
If the vehicle's power weakens, it might be due to a loose power steering belt or air not being completely discharged from the power steering fluid. You can remove the air by turning the steering wheel in place or driving. If the problem persists, the chassis connection components need to be inspected.
Spring corrosion
For some models, improper steel coating may cause corrosion of the shock absorber springs, and the springs need to be replaced or sent for repair.
Operation suggestions
First, check whether the appearance of the shock absorber is damaged and whether the oil is sufficient.
If you have difficulty troubleshooting by yourself, it is recommended to contact professional maintenance personnel for handling.
Common methods for determining whether shock absorbers need to be replaced
Youdaoplaceholder0 visual inspection
Observe whether the shock absorber has any oil leakage (oil stains or grease) or physical damage. Oil leakage indicates that the oil seal has failed and needs to be replaced .
Check whether the shock absorber housing is deformed or severely rusted .
Youdaoplaceholder0 press test
Press a corner of the vehicle body forcefully (such as the bumper). If the vehicle keeps shaking more than 2-3 times after releasing it, it indicates that the damping of the shock absorber has failed .
Under normal circumstances, it should rebound rapidly without obvious aftershocks .
Youdaoplaceholder0 driving performance
The vehicle body shakes more frequently on bumpy roads, or there is a distinct abnormal noise (such as a "thump thump" sound) when passing over speed bumps .
When braking suddenly, the front of the vehicle "nods" severely, or the body tilts more when turning .
Irregular wear on tires (such as unilateral wear) may be caused by the decline in shock absorber performance, resulting in .
Youdaoplaceholder0 temperature test
After driving 10 kilometers, touch the shock absorber housing. If the temperature is cold or there is no heat, it indicates abnormal internal resistance .
Youdaoplaceholder0 professional inspection
Use instruments to test whether the damping force meets the standard, or disassemble and check whether the resistance of the piston rod is stable .
Replacement suggestions
Youdaoplaceholder0 cycle : Usually replace it every 100,000 to 150,000 kilometers, but it depends on road conditions and driving habits .
Youdaoplaceholder0 operation : It is recommended to replace them in pairs on the left and right to avoid performance imbalance .
Youdaoplaceholder0 Brand selection : Original factory or well-known brands (such as BILSTEIN, KYB) are more reliable, while inferior parts may exacerbate the problem .
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