BMW Cars 1999-06

Coil Springs

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Removal & Installation



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Support the lower trailing arm at the hub with a suitable jack and disconnect the stabilizer bar at the control arm and the subframe.
  6.  
  7. Remove the shock absorber lower mounting bolt.
  8.  
  9. Lower the trailing arm slowly and remove the spring to the side.
  10.  

To install:

  1. Install the spring with the bushing in place and the top of the upper spring ring lubricated.
  2.  
  3. Raise the trailing arm to a level where the bolt can be replaced in the lower shock mount. Connect the stabilizer bar. Do not fully tighten the bolts at this time.
  4.  
  5. Install the tire and wheel assembly.
  6.  
  7. Tighten the stabilizer bolt to 16 ft. lbs. (21.5 Nm) and the shock bolt to 63 ft. lbs. (87 Nm) with the control arm in the normal ride position.

    Click image to see an enlarged view

    Fig. Support the trailing arm (1)-3 Series, except Z3 and 318ti



    Click image to see an enlarged view

    Fig. Remove the coil spring-3 Series, except Z3 and 318ti

  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Support the lower control arm securely with a suitable jack or other device that will permit it to be lowered gradually, while maintaining a secure support.



    Rear portion of the exhaust system and support it from the body
     
    Final drive rubber mount, push it downward, and hold it down with a suitable wedge
     
    Bolt that connects the rear stabilizer bar to the strut on the side being worked on. Be careful not to damage the brake line.
     

  4.  
  5. Then, to prevent damage to the output shaft joints, lower the control arm only enough to slip the coil spring off the retainer.
  6.  

To install:

Click image to see an enlarged view

Fig. Rear suspension setup on Z3 and 318ti models

  1. Be sure, when replacing the spring, that the same part number, color code, and proper rubber ring are used. Install the spring, making sure that the spring is in proper position.
  2.  
  3. Keep the control arm securely supported while raising and replace the shock bolt. Install the bolts in the final drive rubber mount and tighten to 69 ft. lbs. (95 Nm).
  4.  
  5. Tighten the stabilizer bolt to 16 ft. lbs. (21.5 Nm), and the shock bolt to 63 ft. lbs. (87 Nm) with the control arm in the normal ride position. Install the exhaust system.
  6.  

The coil spring is removed along with the shock absorber. The 5 and 7 Series use a "coil over" type shock absorber where the spring is mounted to the shock in one compact unit. Once the shock is removed from the vehicle, the spring can be compressed and separated from the shock absorber.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Support the lower trailing arm at the hub with a suitable jack and disconnect the stabilizer bar at the control arm and the subframe.
  6.  
  7. Remove the shock absorber lower mounting bolt.
  8.  
  9. Lower the trailing arm slowly and remove the spring to the side.
  10.  

To install:

  1. Install the spring with the bushing in place and the top of the upper spring ring lubricated.
  2.  
  3. Raise the trailing arm to a level where the bolt can be replaced in the lower shock mount. Connect the stabilizer bar. Do not fully tighten the bolts at this time.
  4.  
  5. Install the tire and wheel assembly.
  6.  
  7. Tighten the stabilizer bolt to 16 ft. lbs. (21.5 Nm) and the shock bolt to 63 ft. lbs. (87 Nm) with the control arm in the normal ride position.

    Click image to see an enlarged view

    Fig. Support the trailing arm (1)-3-Series, except Z3 and Z4



    Click image to see an enlarged view

    Fig. Remove the coil spring-3-Series, except Z3 and Z4

  8.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Support the lower control arm securely with a suitable jack or other device that will permit it to be lowered gradually, while maintaining a secure support.



    Rear portion of the exhaust system and support it from the body
     
    Final drive rubber mount, push it downward, and hold it down with a suitable wedge
     
    Bolt that connects the rear stabilizer bar to the strut on the side being worked on. Be careful not to damage the brake line.
     

  4.  
  5. Then, to prevent damage to the output shaft joints, lower the control arm only enough to slip the coil spring off the retainer.
  6.  

To install:

Click image to see an enlarged view

Fig. Rear suspension setup on Z3 and Z4 models

  1. Be sure, when replacing the spring, that the same part number, color code, and proper rubber ring are used. Install the spring, making sure that the spring is in proper position.
  2.  
  3. Keep the control arm securely supported while raising and replace the shock bolt. Install the bolts in the final drive rubber mount and tighten to 69 ft. lbs. (95 Nm).
  4.  
  5. Tighten the stabilizer bolt to 16 ft. lbs. (21.5 Nm), and the shock bolt to 63 ft. lbs. (87 Nm) with the control arm in the normal ride position. Install the exhaust system.
  6.  

 
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