Shock Absorbers, Leaking

Shock Absorbers, Leaking

Shock absorbers are frequently rejected and exchanged because of leaks. Examinations on the test stand and on the vehicle have shown that the replacement of a large number of rejected shock absorbers was not justified.

Slight leaking of oil ("sweating") at piston rod seal is no reason to replace a shock absorber. A shock absorber damp with oil is OK under the following circumstances:

• Oil leakage (shaded in illustration) is visible, but dull, matte and possibly dry due to dust.






• Oil leakage extends from upper strut connection (piston rod oil seal) no further than lower spring seat - arrow -.

• Minor oil excretion is advantageous since piston rod oil seal gets lubricated, which increases service life. This is true for front and rear shock absorbers.