Shock absorber with adjustment grooves

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Why do shock absorber feature adjustment grooves?

Most series-production vehicles have different equipment as well as levels of motorisation and thus different axle loads, which require corresponding vehicle heights. The different grooves are then needed to be able to “set” the correct body height with the variable spring plate. Correspondingly, this option is also available with the standard replacement shock absorbers from BILSTEIN.

How to deal with adjustment grooves in the workshop: “During installation, the spring plate heights and the correct position of the snap ring and spring plate must be set exactly according to the functional dimensions of the existing OEM part,“ explains BILSTEIN expert Alexander Kranz. The grooves are therefore not used for height adjustment with lowering/raising at your own discretion. In simple terms: The new snap ring must be fitted to the new shock absorber where the snap ring was on the removed shock absorber. 

Deviations in the spring plate height can lead to problems with the pretension (spring plate too low or too high). During compression, there is a risk of the spring going into block or of the support bearings being destroyed. When the spring is released, the locking assembly, piston rod, support bearings and vehicle dome can be damaged or destroyed.

Important aspects during installation:

  • Make sure the snap ring is in the right position and mounted correctly
  • Make sure the snap ring is correctly seated in the groove!
  • If the snap ring is not properly seated, the entire spring plate will slide down
  • Ensure the correct installation position/orientation of the spring plate (do not interchange top and bottom).