GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Lower Control Arm

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See Figures 1, 2, 3, 4, 5 and 6

REMOVAL & INSTALLATION




CAUTION
The coil springs are under a considerable amount of tension. Be extremely careful when removing or installing them; they can exert enough force to cause serious injury. Use only approved spring compressors for suspension servicing.

  1. Remove the spring as described earlier.
  2.  
  3. Remove the ball stud from the steering knuckle as described earlier.
  4.  
  5. Remove the control arm pivot bolts and the control arm. On later models, you may have to guide the control arm out of the splash shield, using a putty knife or similar tool to protect parts.
  6.  

To install:
  1. Position the control arm into spring and locate the bushing-to-frame brackets. If any bolts are to be replaced, do so with bolts of equal strength and quality.
  2.  
  3. Install the bolts and nuts loosely. Connect the control arm with the knuckle and torque the nut to 83 ft. lbs. (112 Nm). Install a new cotter pin.
  4.  
  5. With a jack supporting the lower control arm, torque the attaching bolts.
  6.  
  7. Install the shock absorber, sway bar and wheel. Lower the vehicle and check operation.
  8.  



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Fig. Fig. 1: Exploded view of the lower control arm

CONTROL ARM BUSHING REPLACEMENT



Front Bushing
  1. Remove the lower control arm.
  2.  
  3. Using proper bushing removal tools remove the bushing from the control arm.
  4.  

To install:
  1. Using suitable bushing driver tools, install the bushing onto the control arm.
  2.  
  3. Remove the bushing driver tools and install a suitable bushing flaring tool.
  4.  
  5. Turn the nut until the bushing is flared.
  6.  



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Fig. Fig. 2: Removing the front bushing



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Fig. Fig. 3: Installing the front bushing



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Fig. Fig. 4: Flaring the front bushing

Rear Bushing
  1. Remove the bushing from the control arm using the proper bushing removal tools.
  2.  

To install:
  1. Install the bushings using the appropriate tools. When properly installed, the bushings should bottom against the control arm.
  2.  
  3. Install the control arm using the procedures above.
  4.  



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Fig. Fig. 5: Removing the rear bushing



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Fig. Fig. 6: Installing the rear bushing

 
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