Pontiac Fiero 1984-1988 Repair Guide

Upper Control Arm

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REMOVAL & INSTALLATION



1984-87 Models


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Fig. Fig. 1 Location of the upper control arm shim assembly and bushing components-1984-87 models

  1. Raise the vehicle and support it on jackstands.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Remove the rivet holding the brake line clip to the upper control arm.
  6.  
  7. Support the lower control arm with a floor jack.
  8.  


CAUTION
This procedure must be followed because it keeps the coil spring compressed. Use care to support the lower control arm adequately because the coil spring is under heavy load, if released too quickly personal injury could result.

  1. Remove the upper ball joint from the steering knuckle using a Ball Joint Separator tool J-26407 or equivalent. This procedure has been used earlier in this section.
  2.  
  3. Remove the control arm pivot bolt and remove the control arm from the vehicle.
  4.  
  5. Transfer the ball joint if not damaged or worn.
  6.  

To install:

Washers and shims must be installed as removed unless a change in steering geometry is desired.

  1. Install the upper control arm and pivot bolt on the vehicle. The inner pivot bolt must be installed with the bolt head toward the front.
  2.  
  3. Install the pivot bolt nut.
  4.  
  5. Position the control arm in a horizontal plane and torque the nut to 66 ft. lbs. (90 Nm).
  6.  

The bolt may turn when torqued to minimum if the nut is not backed up with a wrench. This does not mean the joint is loose.

  1. Install the ball joint on the upper control arm and to the steering knuckle, as described earlier. Install the nut and torque it to 35 ft. lbs. (47 Nm). Install a new cotter pin.
  2.  
  3. Install the wheel and tire and torque the lug nuts to 100 ft. lbs. (136 Nm). Lower the vehicle to the floor.
  4.  

1988 Models


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Fig. Fig. 2 Upper control arm assembly and its related components-1988 models

  1. Raise the vehicle and support safely with jackstands.
  2.  
  3. Remove the front wheel assemblies.
  4.  
  5. Support the lower control arm with a floor jack.
  6.  


CAUTION
This procedure must be followed because it keeps the coil spring compressed. Use care to support the lower control arm adequately because the coil spring is under heavy load, if released too quickly personal injury could result.

  1. Remove the bolt attaching the brake line clip-to-upper control arm.
  2.  
  3. Remove the tie rod end from the steering knuckle and swing knuckle outboard.
  4.  
  5. Remove the upper ball joint from the steering knuckle using a Ball Joint Separator tool J-26407 or equivalent. This procedure has been used earlier in this section.
  6.  
  7. Remove the two bolts and paddle nut assemblies attaching the upper control arm shaft to the crossmember and remove the control arm from the vehicle.
  8.  

To install:

  1. Install the upper control arm to the crossmember with a new paddle nut assembly. Do not apply the final torque until the alignment has been performed.
  2.  

Inspect the tapered hole in the steering knuckle for out-of-roundness, deformation and damage. Replace the knuckle if these conditions exist. Clean all dirt and rust out the tapered hole before installation.

  1. Install the upper control arm to the steering knuckle and torque the nut to 30-40 ft. lbs. (40-55 Nm) + 1 / 6 turn to align and install the cotter pin. Do not exceed 55 ft. lbs. (75 Nm) of torque to the nut.
  2.  
  3. Install the brake line clip-to-upper control arm attaching bolt.
  4.  
  5. Install the front wheel assemblies and torque the lug nuts to 100 ft. lbs. (136 Nm).
  6.  
  7. Remove the jack under the lower control arm and lower the vehicle to the ground.
  8.  
  9. Check and align the front end as outlined in the Front Alignment portion of this section.
  10.  

The Do-it-Yourself mechanic should not attempt to perform any wheel alignment procedures. Expensive alignment tools are needed and it would not be cost efficient to purchase these tools. The wheel alignment should be performed by a certified alignment technician using the proper alignment tools.

 
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