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Strut With Coil Spring: Disassembly

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WARNING: You will be exposed to a high risk of injury if you fail to comply with the following points:
  • Follow instructions for using spring tensioner.
  • Use only specified special tools.
  • Use Protective Insert (31 3 365) for Special Tool (31 3 355).
NOTE: Replace coil springs in pairs only. Fit each axle with the same part number. Coil springs are allocated according to vehicle type, launch date and optional extras.
  1. Clamp Special Tool (31 4 341) at guide (1) in vice. See Fig 1. Position Spring Retainer (31 3 355) with protective insert (31 3 365) and spring retainer (31 3 354) without protective insert from above on Special Tool (31 3 341) until locking pins (2) can be felt and heard to snap into place. Check secure seating of Special Tools (31 3 354) and (31 3 355).
    2. WARNING: Coils of coil springs must be located completely in recess of Special Tools (313354) and (31 3 355) with Protective Insert (31 3 365) when tensioned. Compress coil spring until stress on piston rod is relieved.
  2. Clean coil spring to remove heavy contamination. Insert upper spring plate in Special Tool (31 3 354). See Fig 2. Place lower coil of coil spring in Special Tool (31 3 355). Twist spring strut until end of coil spring is flush with end of Special Tool (31 3 355). Tension coil spring until stress on piston rod is relieved.
  3. Remove cap by removing nut with Special Tool (31 2 210). See Fig 3. If necessary, use Allen wrench to hold piston rod at hexagon socket to keep it from turning. Remove support bearing, dust sleeve and shim. Remove spring strut with auxiliary spring, gaiter and lower spring pad sideways from tensioned coil spring.
  4. Remove auxiliary spring (1), gaiter (2) and spring pad (3). See Fig 4. If necessary, relieve tension on coil spring.
Fig 1: Clamping Special Tool In Vice
G00315132Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Placing Coil Spring In Special Tool
G00315133Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Removing Coil Spring Cap
G00315134Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Identifying Auxiliary Spring, Gaiter & Spring
G00315135Courtesy of BMW OF NORTH AMERICA, INC.
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