BMW Coupes and Sedans 1970-1988 Repair Guide

Rear Coil Springs

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REMOVAL & INSTALLATION



1600, 2000 and 2002 Models

See Figure 1

The coil spring is separate from the shock on these vehicles


CAUTION
Make sure that the car is firmly supported with jackstands.

  1. Remove the shock absorber as outlined in this section. Make sure that the trailing arm is securely supported with a jack.
  2.  
  3. Remove the rear wheel and tire assembly.
  4.  
  5. If equipped, disconnect the stabilizer bar from the mount on the trailing arm.
  6.  
  7. Disconnect the output shaft at the halfshaft flange and tie the output shaft up to an underbody component so that it does not hang down.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Rubber lower coil spring damper. When installing, make sure the indent aligns properly

  1. Safety wire or chain the bottom coil of the spring to an underbody component to protect yourself from injury should the spring slip off its lower mount during removal.
  2.  
  3. Slowly lower the jack supporting the trailing arm and carefully release the spring and wire.
  4.  
  5. Inspect the condition of the rubber damping rings. Replace if damaged or dry-rotted. Make sure that the lower ring's locating recess fits into the projection on the lower mounting plate. If the spring is broken, it is recommended that both springs be removed and replaced with new ones of the same size, diameter, free length, and color coding (spring rate).
  6.  

To install:
  1. Install the spring into position,
  2.  
  3. Reconnect the output shaft at the half shaft. Reconnect the stabilizer bar.
  4.  
  5. Install the wheel and tire and install the shock absorber.
  6.  

Take care to rotate the coil spring so that the spring ends locate on the stop (projection) of the upper and lower damping rings.

3 Series Models

See Figure 2

The coil spring is separate from the shock on these vehicles.

  1. Disconnect the rear portion of the exhaust system and hang it from the body.
  2.  
  3. Disconnect the final drive rubber mount, push it down, and hold it down with a wedge.
  4.  
  5. Remove the bolt that connects the rear stabilizer bar to the strut on the side being worked on. Be careful not to damage the brake line.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Lower the control arm only enough to remove the coil spring

Support the lower control arm securely with a jack or other device that will permit it to be lowered gradually, while maintaining secure vehicle support.

  1. Then, to prevent damage to the output shaft joints, lower the control arm only enough to slip the coil spring off the retainer.
  2.  

To install:
  1. In replacing the spring, make sure the parts are the same in terms of part number and/or color code.
  2.  
  3. Install the spring, making sure that the spring is in proper position.
  4.  
  5. Keep the control arm securely supported while raising, then replace the shock bolt. Install the bolts in the final drive rubber mount and tighten to 69 ft. lbs. (95 Nm).
  6.  
  7. Tighten the stabilizer bolt to 16 ft. lbs. (21 Nm), and the shock bolt to 63 ft. lbs. (87 Nm) with the control arm in the normal ride position. Install the exhaust system.
  8.  

5, 6 and 7 Series Models
  1. Raise and support the rear of the vehicle.
  2.  
  3. Remove the rear seat cushion and backrest if the assembly must be accessed from the rear seat compartment. Remove the trim panel over the strut mount.
  4.  
  5. Support the control arm and remove the nuts at the top of the strut mount.
  6.  
  7. Remove the lower mounting bolt and lower the spring strut assembly. Remove the assembly from the vehicle.
  8.  
  9. Use a spring compressor to compress the spring. Remove the top nut and pull the top mount off. Remove the spring.
  10.  

To install:
  1. Compress new spring and position on the strut assembly. Install the mount and washers. Use a new locknut and tighten to 18 ft. lbs. (25 Nm). Release the spring.
  2.  
  3. Install the spring/strut and tighten the upper mount nuts to 16 ft. lbs. (21.5 Nm). Loosely install the lower mounting bolt.
  4.  
  5. With the vehicle lowered to the ground and at standard riding height, tighten the lower mount to 94 ft. lbs. (130 Nm).
  6.  
  7. Install the trim and seat cushions.
  8.  

 
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