Replacing Rear Left or Right Spring Strut Shock Absorber

33 52 131 - Replacing rear left or right spring strut shock absorber





Special tools required:
- 31 3 340 31 3 340 Spring Tensioner
- 31 3 341 31 3 340 Spring Tensioner
- 31 3 357 31 3 350 Spring Holder





Note:
Version with Electronic Damper Control (EDC):

In a warranty case you must always provide a fault memory printout, even where there is no fault memory entry, with the defective part.





Warning!
Prior to each use of the special tool 31 3 340 31 3 340 Spring Tensioner, it is essential to read the associated Owner's Handbook fully!

All the safety precautions and instructions contained in the Owner's Handbook must be strictly observed!

Failure to observe these safety precautions and instructions increases the risk of serious physical injury, damage to your health and damage to property and equipment!





Important!
1. Prior to each use, check the special tools for defects, modifications and operational reliability.
2. Damaged/modified special tools must not be used!
3. No changes or modifications may be made to the special tools!
4. These special tools are intended solely for the purpose of tightening and relieving cylindrical and tapered suspension springs.
5. Keep special tools dry, clean and (down to the spindle) free from grease.
6. Impact screwdrivers are prohibited!
7. Do not compress coil spring to full extent.





Necessary preliminary tasks:
- Remove rear spring strut shock absorber Removing and Installing Rear Left or Right Spring Strut Shock Absorber





Removing:

Clamp special tool 31 3 341 31 3 340 Spring Tensioner in vice.

Fit special tools 31 3 357 31 3 350 Spring Holder from above on special tool 31 3 341 31 3 340 Spring Tensioner until locking pins (1) can be felt and heard to snap into place.

Check seating of special tools 31 3 357 31 3 350 Spring Holder, correct if necessary.





Clean coil spring to remove all coarse dirt and mount on special tools 31 3 357 31 3 350 Spring Holder.

Warning!
Coils of coil spring must be located completely in recesses of special tools 31 3 357 31 3 350 Spring Holder!

Compress coil spring until stress on piston rod is relieved.





Release nut (gripping piston rod in the process).

Remove plate and support bearing with spring pad.

Remove shock absorber with support pot, auxiliary damper, protective tube and spring pad sideways from tensioned coil spring.





If necessary, remove support pot, auxiliary damper (1) with protective tube and spring pad (2) from shock absorber.





Relieve tension on coil spring and remove from special tools 31 3 357 31 3 350 Spring Holder.





Assembly:

Note:
M5: Make sure when tensioning that the upper section of the coil spring is covered by a protective tube.

Accommodate coil spring with special tools 31 3 357 31 3 350 Spring Holder in such a way that both ends of coil spring are approx. one coil (W) outside special tools 31 3 357 31 3 350 Spring Holder.





Warning!
Do not compress coil spring to full extent.

Coils of coil spring must be located completely in recesses of special tools 31 3 357 31 3 350 Spring Holder!

Tension coil spring.





Check auxiliary damper (1) with protective tube and spring pad (2) for damage, replace if necessary.





Attach support pot to piston rod.

Replacement only: Carry over marking from old part to new part.

Insert shock absorber in tensioned coil spring.





Check support bearing for damage, replace if necessary.

Attach support bearing and plate to piston rod.

Replace nut and tighten down (gripping piston rod in so doing).

Tightening torque 33 52 2AZ Shock Absorbers (Rear).





Important!
One threaded pin (1) on the thrust bearing must be on one plane with the bore in the rubber mount (2) and the opposite side of the bush (3).





Important!
Align support bearing by way of spring pad to end of coil spring.





Important!
Lower end of coil spring must rest on stop of spring pad!

Relieve tension on coil spring.