33 90 ... Troubleshooting Shock Absorber
WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Read and comply with Information on replacing shock absorbers .
SHOCK ABSORBER TROUBLESHOOTING CHART
| Fault | Cause | Remedy |
|---|---|---|
| Wheel knocking (bottoming) | Auxiliary spring faulty | Visually inspect auxiliary spring for cracking, replace auxiliary spring . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |
| Shock absorber leaking (oil/gas) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . | |
| Rattling noise | Shock absorber mounting loose | Tighten shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |
| Support bearing loose | Secure support bearing . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . | |
| Support bearing defective (cracked) | Visually inspect for cracking, replace support bearing . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . | |
| Protective tube defective/failed | Visually inspect protective tube for cracking, replace protective tube | |
| Rubber mount/joint eye for lower shock absorber mounting defective | Replace rubber mount/joint eye . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING or 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . | |
| Shock absorber leaking (oil/gas) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . | |
| Worn down areas (flattened areas) on tyre profile | Shock absorber leaking (gas/oil) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |
| Long after-swinging of body after driving over rough road | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |
| Building-up of body in case of successive uneven surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |
| Wheels jumping even on normal road surfaces | Shock absorber leaking (insufficient shock absorber effect) | Replace shock absorber . See 33 52 131 REPLACING REAR LEFT OR RIGHT SPRING STRUT SHOCK ABSORBER . |