GM: Electra/Park Avenue/Ninety-Eight 1990-1993

MacPherson Strut

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Fig. Fig. 1 Front suspension components



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Fig. Fig. 2 Exploded view of the front strut-with bushing



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Fig. Fig. 3 Exploded view of the front strut-with bearing



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Fig. Fig. 4 Sturt mounted in a strut spring compressor



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Fig. Fig. 5 Removing strut shaft nut

REMOVAL & INSTALLATION



  1. Loosen the strut housing tie bar assembly through bolts.
  2.  
  3. Remove the 3 mounting nuts from the top of the strut assembly.
  4.  
  5. Raise and safely support the vehicle. Position a jackstand under the engine cradle and lower the vehicle so the weight of the vehicle rests on the jackstand, with the control arms hanging free.
  6.  
  7. Remove the tire and wheel assembly. If equipped with abs, disconnect the front sensor.
  8.  
  9. Disconnect the brake line bracket from the strut assembly. In order to get the front alignment close when installing, matchmark the strut to the knuckle prior to removal. Then remove the strut-to steering knuckle bolts.
  10.  
  11. Remove the strut assembly from the vehicle.
  12.  

To install:

  1. Install the strut assembly into the strut tower. Install the mounting nuts to the top of the strut assembly. Torque to 18 ft. lbs. (24 Nm).
  2.  
  3. Install the strut-to-steering knuckle bolts, aligning the marks made earlier. Torque to bolts to 140 ft. lbs.(190 Nm).
  4.  
  5. Connect the brake line bracket to the strut assembly.
  6.  
  7. If equipped with abs, connect the front sensor. Install the tire and wheel assembly.
  8.  
  9. Lower the vehicle.
  10.  
  11. Install the strut housing tie bar assembly through bolts.
  12.  
  13. Have the vehicle's alignment professionally set.
  14.  

OVERHAUL




CAUTION
An assembled strut coil spring is under extremely high pressure. Safe servicing requires the use of a quality strut spring compressor tool or specially-designed press. Do not attempt to simply disassemble the unit without utilizing one of the above tools to compress the spring, or personal injury will result.

  1. Remove the MacPherson strut assembly from the vehicle.
  2.  
  3. Following the manufacturer's instructions provided with the tool, install the spring compressor to the spring, or install the strut to the press (depending on which item you are using). Compress the spring sufficiently in order to relieve the upper mount of all spring pressure.
  4.  
  5. Hold the strut rod stationary using a 50 Torx ® socket and ratchet wrench.
  6.  
  7. Use a 24mm wrench to loosen the retaining nut. As you loosen the nut, recheck the mount for any spring tension, and the compressed spring for proper alignment.
  8.  
  9. Remove the nut, then disassemble the unit as shown. Make special note of the bearing orientation, if equipped. Replace all damaged or questionable parts.
  10.  

To assemble:

  1. Assemble all items in reverse order of disassembly, keeping the following points in mind:
  2.  
    1. Properly fit the spring to its seat on the base, and the top mount to the spring.
    2.  
    3. The flat on the upper seat must face the same direction as the steering knuckle mounting flange.
    4.  
    5. If the strut was equipped with a bearing (as opposed to a bushing), install the bearing in the same orientation as it originally had.
    6.  

  3. With the spring safely compressed and the strut rod threads sticking up through the top mount, install the nut. Final torque on the nut is 55 ft. lbs. (75 Nm).
  4.  
  5. Slowly relieve tension from the spring until it is fully extended within the strut unit. Recheck spring installation.
  6.  
  7. Install the MacPherson strut assembly to the vehicle.
  8.  

 
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