Shock absorber failure can be grouped into 3 areas:
Oil leakage, physical defect or noise.
Oil Leakage
Normally oil leakage occurs as a result of damaged oil seal or bushing. Any damage to the piston rod can affect the oil seal.
Cause and Action
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Damage due to worn out parts (Dust cover, bump rubber). Replace those parts, with new parts, and replace new KYB shock absorber | Damage by tools (plier etc) during installation of Shock Absorber). Do not hold piston rod by any tools. Replace new KYB shock absorber | Unsatisfactory installation of shock absorber causes irregularity. Correct installation with the right instruction or suitable tools. |
Noise
Noise can be present as either a rattle or a swish. Any damage to the piston rod can affect the oil seal.
Cause and Action
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Not using KYB supplied parts during installation, or use of other brand parts. Replace shock absorber using parts provided. | Damage by tools (plier etc) during installation of Shock Absorber). Do not hold piston rod by any tools. Replace new KYB shock absorber. | Incorrect bump or rubber used. Piston rod or internal components may be damaged by using wrong rubber. Replace shock absorber by using correct components. |
Physical Defect
Physical defects are bent or broken shock absorbers.
Cause and Action
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Pressure by frozen liquid put in the strut. Do not put any liquid in the strut housing. | Tightened with impact wrench. Do not use any power tools. |
Cause and Action
Wrong Installation of shock absorbers and equivalent parts. Confirm KYB Instruction Sheet and Car Manufacturer Manual, and Replace Wrong parts or procedure.