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Coil Spring & Shock Absorber: Disassembly

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WARNING: Before they are used, always check that special tools work properly. DO NOT use damaged tools. DO NOT make any modifications to special tools. Use only suitable spring retainers. Never use an impact wrench for tensioning/releasing purposes. Keep protective inserts clean and free from oil and grease.
  1. Clamp Special Tool (31 3 341) at guide (1) in vise. See Fig 1 . Slide in Special Tools (31 3 354) without protective insert and (31 3 355) in each case from chamfer of special tool (31 3 34). Locking pins (2) must be felt and heard snapping into place. Spring retainers must be pushed in from chamfer side (1) of Special Tool (31 3 341). See Fig 2 . Locking pins must be felt and heard snapping into place. Check seating of spring retainers again.
  2. Position coil spring between spring holders. End of spring (1) must be flush with end of spring holder (2). See Fig 3 . When tensioned in the spring holder, the spring coil must rest completely in the recess.
  3. Tighten down coil springs until stress on the thrust bearing is just relieved.
  4. Release nut with special tool (31 2 210). DO NOT use an impact screwdriver. Grip piston rod firmly, if necessary, and remove spring strut shock absorber. See Fig 4 .
  5. If a new coil spring is installed, release special tool (31 3 341) and remove coil spring. The special tool must not be tightened or untightened with an impact wrench. Check spring pad (1). See Fig 5 . Replace if necessary. Fit spring pad (1) and spring plate (2) onto new coil spring. Make sure that end of spring, spring pad (1) and spring plate (2) form a positive connection.
Fig 1: Clamping Special Tool In Vise
G00367810Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Locating Chamfer
G00148260Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Placing Coil Spring In Spring Holder
G00367811Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Using Special Tool (31 2 210)
G00155799Courtesy of BMW OF NORTH AMERICA, INC.
Fig 5: Checking Spring Pad
G00367812Courtesy of BMW OF NORTH AMERICA, INC.
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