Isuzu Cars and Trucks 1981-1991

Upper Ball Joint

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INSPECTION

Grasp the top of the front wheel and pull it in and out several times to check for excessive movement of the ball joint; if no movement exist, the joint is in good shape.

REMOVAL AND INSTALLATION
RWD I-Mark and Impulse
  1. Raise the car and support it safely. Remove the wheel.
  2.  
  3. Remove the upper brake caliper bolt and slide the hose retaining clip back about 1 / 2 in. (13mm).
  4.  
  5. Remove the lower shock absorber nut and bolt and push the shock absorber up.
  6.  
  7. Place a hydraulic jack under the outer extreme of the lower control arm and raise until level.
  8.  
  9. Loosen the upper ball joint nut until the top of the nut is flush with the top of the ball joint.
  10.  
  11. Using special tool J26407 or equivalent, disconnect the upper ball joint from the steering knuckle.
  12.  
  13. Remove the two bolts connecting the upper ball joint to the upper control arm. Remove the ball joint.
  14.  



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Fig. Installing the upper ball joint in the control arm RWD I-Mark and Impulse



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Fig. Removing the upper control arm from the crossmember RWD I-Mark and Impulse



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Fig. Installation of the upper control arm RWD I-Mark and Impulse

To install:

  1. Install the new ball joint in the control arm so that the cut-off portion is facing outward. Torque all attaching nuts and bolts.
  2.  


NOTE
The car should be aligned whenever any suspension components are replaced. The cut-off portion of the ball joint is to change the suspension camber 1 degree.

All Trucks
  1. Raise and safely support the vehicle. Remove the wheel and tire assembly.
  2.  
  3. Remove the tension from the torsion bar.
  4.  
  5. Remove the upper ball joint-to-steering knuckle nut.
  6.  
  7. Using a ball joint separator tool, separate the upper ball joint from the steering knuckle.
  8.  
  9. Remove the upper ball joint-to-upper control arm bolts and the ball joint.
  10.  



Click image to see an enlarged view

Fig. Upper ball joint Trucks

To install:

  1. Install the ball joint and torque the upper ball joint-to-upper control arm bolts to 21 and 1925 ft. lbs. (29 and 1935 Nm) and the upper ball joint-to-steering knuckle nut to 7287 ft. lbs. (96 and 19117 Nm) for 2WD or to 65 and 1980 ft. lbs. (88 and 19108 Nm) for 4WD.
  2.  
  3. Adjust the tension on the torsion bar and lower the vehicle.
  4.  

 
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