Replacing front (EDC) left or right spring strut
Special tools required:
- 31 3 340
- 31 2 230
- 2 240 516
- 2 364 829
- 31 3 341
- 2 240 482
- 2 364 828
- 2 240 486
- 2 240 487
- 2 412 607
- 2 240 490
- 2 360 213
- 2 359 147
Attention!
- When replacing the spring strut, replace the auxiliary damper as well!
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!
Attention!
- Use only the BMW approved special tool!
- Prior to each use, check the special tools for defects, modifications and operational reliability.
- Damaged/modified special tools must not be used!
- No changes or modifications may be made to the special tools!
- These special tools are intended solely for the purpose of tightening and relieving cylindrical and tapered suspension springs.
- Keep special tools dry, clean and (down to the spindle) free from grease.
- Impact screwdrivers are prohibited! Risk of damage inside the shock absorber!
- Do not compress coil spring to full extent.
Necessary preliminary tasks:
- Remove FRONT SPRING STRUT .
Slacken nut (1).
Take off holder (2).
Pull out screw (3).
Expand swivel bearing with special tool 31 2 230 and pull off spring strut.
Release screw (2).
Remove the vertical acceleration sensor (1).
Attention!
Risk of damage to the coil spring!
Check protective inserts for wear before application, replace if necessary.
Use of faulty protective inserts leads to coil spring damage. This can lead to coil spring breakage (corrosion).
Always use the pressure plate 2 240 516 with protective insert 2 364 829.
Clamp special tool 31 3 341 in vice.
Fit special tool 2 240 516 and 2 240 482 onto special tool 31 3 341 until retaining bolt (1) can be felt and heard to snap into place.
Insert centering ring 2 364 828 into mounting plate 2 240 482.
Check seating of special tools 2 240 516 and 2 240 482 with centering ring 2 364 828, correct if necessary.
Installation of brake onto mounting plate:
Place counter support 2 240 486 in the correct position/bore hole:
- Screw connection using bore holes 7 and 15
Turn the centering ring 2 364 828 until the counter support 2 240 486 can be screwed into place at the
Screw together counter support with mounting plate and the centering ring with screws (1) so they are hand-tight!
Clean coil spring to remove contamination.
Spring must be free of grease, clean and dry.
Insert spring strut into spring tensioner.
The support bearing must be completely fitted against the centering ring 2 364 828.
The lower spring coil must be placed completely into the recess of special tool 2 240 516!
Attention!
Risk of damage to the coil spring!
Check protective inserts for wear before application, replace if necessary.
Use of faulty protective inserts leads to coil spring damage. This can lead to coil spring breakage (corrosion).
Always use the pressure plate 2 240 487 with protective insert 2 412 607.
Attach pressure plate 2 240 487 with the screws 2 240 490!
The gummed side of the pressure plate 2 240 487 must be fitted against the top spring coil.
Position the spring strut so that the end of the spring (1) at the pressure plate 2 240 487 protrudes by 40 mm.
Tighten the screws 2 240 490 evenly at 8 Nm.
Attention!
The pressure plate 2 240 487 must be aligned parallel with the top spring coil (1)!
When the end of the spring begins to twist relative to the pressure plate, tensioning must be stopped immediately.
The pressure plate must be checked for correct seating and the rubber-coated facing and pressure plate also checked for wear.
Tension coil spring with spring tensioner 31 3 341 until stress on piston rod is relieved.
Release nut with special tool 2 360 213, reversible ratchet with extension and socket SW10.
Remove the spring strut with auxiliary damper.
Installation:
Replace the auxiliary damper (2).
Parts:
Remove the spring pad (1) and mount onto the new spring strut, replace if necessary.
The plastic tab (2) must be positioned in the bore hole (3) in the spring cup.
Insert spring strut into tensioned coil spring.
Attention!
Check the installation position of the protective tube, correct the fold if necessary.
Replace nut.
Parts: Nut
Tighten new nut with special tool 2 360 213, reversible ratchet with extension, socket SW10 and torque wrench with ring spanner insert SW21.
Tightening torque 31 31 3AZ .
Relieve tension on coil spring.
Impact screwdrivers are prohibited!
Risk of damage inside the shock absorber!
Installation note:
Keep swivel bearing and spring strut in lower area clean and free from oil and grease.
Attention!
Align special tool 2 359 147 as shown to ensure a correct installation on the swivel bearing!
Special tool 2 359 147 may only be removed after the screw connection is applied!
Expand swivel bearing with special tool 31 2 230, align based on gap to bridge (1) on rear side of spring strut and push upwards.
Using special tool 2 359 147 and a torque wrench with ring spanner insert, pull swivel bearing to limit position (tightening torque 20 Nm).
Remove special tools 31 2 230.
Position holder (2).
Replace screw (3) and nut (1).
Parts: Bolt and nut
Insert bolt (3).
- Screw head must point in direction of travel.
Tighten nut (1).
Tightening torque 31 31 4AZ .
Remove special tool 2 359 147.
Position vertical acceleration sensor (1) on the spring strut.
Tighten screw (2).
Tightening torque 37 14 5AZ .
Required follow-up work:
- Install FRONT SPRING STRUT .
- Carry out wheel alignment procedure. Refer to CARRY OUT KINEMATICS DIAGNOSIS SYSTEM WHEEL ALIGNMENT WITH VEHICLE LOAD UP TO DESIGN POSITION or KINEMATICS DIAGNOSIS SYSTEM WHEEL ALIGNMENT WITH RIDE HEIGHT MEASUREMENT WITHOUT LOADING THE VEHICLE .