Shock absorber. Top mount
1 - cover
2 - nut M14, 65 Nm
3 - adapter. Execution only for bad roads (Eastern Europe)
4 - nut M8, 25 Nm
5 - support
6 - protective cuff
7 - washer
8 - upper spring plate
9 - upper spring support
10 - plastic spring
11 - case
12 - spring
13 - lower spring support
14 - shock absorber
15 - nut. Execution only for bad roads (Eastern Europe)
Springs on the same axle must only be replaced in pairs and with the same BMW number. The number is stamped on the end of the spring.
When replacing, it is necessary to install shock absorbers of only one design and the same design. The designation is given on a sticker located on the shock absorber tube. The second line of the sticker shows the spare part number, the third line shows the running gear design code: 4Z/6Z-Sport - 4/6-cylinder sports running gear. The bottom line is R or L for the right or left shock absorber, respectively, when viewed in the direction of travel.
Withdrawal
1. Remove an amortization rack, address to the Section Removal and installation of an amortization rack.
2. To remove the shock absorber, it is necessary to compress the spring. The spring is compressed using a tool such as HAZET 4900. The tool must be clamped in a vise as shown in the illustration. HAZET plastic pads must be used to protect the spring surface.
Never remove the shock absorber if the spring is not compressed.
Insert the compression tool into the coils of the spring so that the coils are securely gripped and the tool cannot slip out. The device is under heavy load, so only a reliable tool should be used. Never compress the tool with wire. There is a danger of an accident!
The device should be compressed only until the support is unloaded. In no case do not compress the device to the stop, that is, the coils of the spring should not touch each other.
3. Unscrew the fastening nut with a spanner wrench, while holding the stem from turning with a socket wrench.
The nut has a large loosening torque. If necessary, you can move the nut by hitting the wrench with a hammer. 1 - torque wrench, 2 - compression tool, BMW-31-2-210.
4. Remove support with O-ring and washer.
5. Remove the top spring plate.
6. Remove the damper from the spring.
If only the spring needs to be replaced, slowly loosen the spring. If only the shock absorber needs to be replaced, the spring must remain compressed.
7. Remove the plastic spring, cover and lower spring pad.
Installation
8. The new spring has a protective coating against corrosion. Before installation, check the protective coating of the springs and restore it if necessary.
9. Check for damage to the cover. Plastic spring and spring pads. Replace if necessary.
10. Insert the shock absorber with the lower spring pad, plastic spring and boot into the compressed spring.
11. Collect an amortization rack. Make sure that the spring is adjacent to the projections of the lower and upper spring plates.
12. Thread a new self-locking nut flush onto the damper rod.
13. Slowly loosen the spring until it rests on the cymbals. Check the correct position of the spring pad (rectangular slots).
14. Tighten the fastening nut to 65 Nm, holding the stem from turning. To maintain the tightening torque, the workshop uses the head BMW-312210 or HAZET-2927.
15 Fully loosen the spring and remove the tool.
16. Establish into place an amortization rack.