31 33 100 Replacing front left or right coil spring
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
- 33 0 040
Attention !
- When replacing shock absorber/spring strut, replace auxiliary damper!
Strictly adhere to all safety information and instructions in the operating instructions!
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!
- Do not compress coil spring to full extent.
Necessary preliminary tasks:
- Remove FRONT SPRING STRUT .
Removing:
Loosen the nut (2).
Pull out screw (1).
Remove bracket from brake hose.
Spread swivel bearing with the special tool 31 2 230 .
Lift the spring strut (3) out of the swivel bearing.
Attention !
Risk of damage to the coil spring!
Before application: Check protective insert for wear, 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 the seating of the special tools 2 240 516 and 2 240 482 by means of the centering ring 2 364 828 , correct if necessary.
Set special tool 31 3 341 to dimension A.
Dimension A: 155 - 160 mm
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 centering ring 2 364 828 until counter support 2 240 486 can be screwed into place at the specified position.
Screw together counter support with the mounting plate and the centering ring hand-tight using the screws (1)!
Clean coil spring to remove contamination.
Spring must be free of grease, clean and dry.
Insert spring strut into the 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!
Before application: Check protective insert for wear, 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 such that the end of the spring (1) at the pressure plate 2 240 487 protrudes by 15 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.
Tighten coil spring, until dimension B on special tool 31 3 341 is reached.
Dimension B: 95 - 90 mm
Attention !
Dimension B must not be dropped below!
Release nut with special tool 33 0 040 .
Remove shock absorber from tensioned coil spring.
Relieve tension on coil spring.
Release special tool 2 240 487 .
Take out the coil spring with protective tube and support bearing.
Assembly:
Set special tool 31 3 341 to dimension A.
Dimension A: 190 - 200 mm
Check lower spring pad (1) for damage, replace if necessary.
Attach lower spring pad (1) to spring cup.
Check protective tube/upper spring pad (2) for damage, replace if necessary.
Replace the auxiliary damper (3).
Parts: Auxiliary damper
Accommodate new coil spring with special tools 31 3 341.
Attach the 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 coil spring so that the end of the spring (1) protrudes by 15 mm beyond the pressure plate 2 240 487 .
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.
Tighten coil spring, until dimension B on special tool 31 3 341 is reached.
Dimension B: 95 - 90 mm
Attention !
Dimension B must not be dropped below!
Insert spring strut into tensioned coil spring.
Replace nut.
Parts: Nut
Tighten the nut using special tool 33 0 040 and the torque wrench featuring ring spanner insert.
Tightening torque 31 31 2AZ .
Impact screwdrivers are prohibited!
Risk of damage inside the shock absorber !
Check installation position of protective tube, correct if necessary.
The end of the coil spring must lie at the limit position of the spring washer.
End of lower coil spring (1) must rest on stop of spring pad (2).
Align all components correctly to each other and relive tension on coil spring.
Spread swivel bearing with the special tool 31 2 230 .
Align the swivel bearing using the gap to the positioning pin on the rear side of the spring strut (3) and push it on as far as it will go.
Position the brake hose bracket.
Replace screw (1) and nut (2).
Parts: Bolt and nut
Insert bolt (1).
Tighten nut (2).
Tightening torque 31 31 3AZ .
After installation:
- Install FRONT SPRING STRUT .
- Check HEADLIGHT ADJUSTMENT , correct if necessary.