Isuzu Cars and Trucks 1981-1991

Lower Ball Joint

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INSPECTION
  1. Raise and safely support the front of the vehicle.
  2.  
  3. Using a large pry bar, place it under the front wheel and try to pry the wheel upwards.
  4.  
  5. If excessive upward movement or clunking is noticed, the ball joint is damaged and requires replacement.
  6.  

REMOVAL AND INSTALLATION
RWD I-Mark
  1. Raise the car and support it safely. Remove the front wheel.
  2.  
  3. Remove the tie rod end cotter pin and castle nut. Discard the pin and separate the tie rod end with a suspension fork. Remove the tie rod from the steering knuckle.
  4.  
  5. Remove the stabilizer bar bolt and grommet assembly from the lower control arm.
  6.  
  7. Remove the upper brake caliper bolt and slide the brake hose retaining clip back about 1 / 2 in. (13mm).
  8.  
  9. Remove the shock absorber lower bolt and push the shock up.
  10.  


CAUTION
Secure a safety chain through the upper and lower control arms to prevent the possibility of the spring coming out and causing serious damage or injury. Allow enough room to get the ball joint out.

  1. Place a hydraulic jack under the outer extremity of the lower control arm and raise it until level.
  2.  
  3. Loosen the ball joint lock nut until the top of the nut is flush with the top of the ball joint.
  4.  
  5. Using special tool J26407 or equivalent, disconnect the lower ball joint from the steering knuckle.
  6.  
  7. Remove the hub assembly and steering knuckle from the lower ball joint and support with a wire or rope.
  8.  
  9. Remove the lower ball joint from the control arm using tool J951903 or equivalent.
  10.  



Click image to see an enlarged view

Fig. Removing the lower ball joint from the steering knuckle



Click image to see an enlarged view

Fig. Removing the lower ball joint from the lower control arm RWD I-Mark

To install:

  1. Install the lower ball joint into the control arm using tool J951903 or equivalent.
  2.  
  3. Install the hub assembly and steering knuckle to the lower and upper ball joint.
  4.  
  5. Tighten the ball joint lock nut until the slot in the nut is aligned to the hole in the stud. Do NOT overtighten. About 25 ft. lbs. (34 Nm) is enough.
  6.  
  7. Install the shock absorber lower bolt.
  8.  
  9. Install the upper brake caliper bolt and the brake hose retaining clip.
  10.  
  11. Install the stabilizer bar bolt and grommet assembly to the lower control arm.
  12.  
  13. Install the tie rod end cotter pin and castle nut.
  14.  
  15. Install the front wheel and lower the vehicle.
  16.  

FWD I-Mark, Impulse and Stylus
  1. Loosen the wheel nuts.
  2.  
  3. Raise the vehicle and support it on jackstands.
  4.  
  5. Remove the wheel and tire assembly.
  6.  
  7. Remove the two nuts retaining the ball joint to the tension rod and control arm assembly.
  8.  
  9. Remove the pinch bolt retaining the ball joint to the steering knuckle.
  10.  
  11. Remove the ball joint.
  12.  



Click image to see an enlarged view

Fig. Lower ball joint FWD I-Mark shown, Impulse and Stylus similar

To install:

  1. Install the ball joint.
  2.  
  3. Install the pinch bolt retaining the ball joint to the steering knuckle.
  4.  
  5. Install the two nuts retaining the ball joint to the tension rod and control arm assembly.
  6.  
  7. Install the wheel and tire assembly.
  8.  
  9. Lower the vehicle.
  10.  
  11. Torque the steering knuckle arm nut to 51 ft. lbs. (68 Nm) and the tension rod nut to 80 ft. lbs. (108 Nm).
  12.  

P'up, Amigo, Trooper and Rodeo
  1. Raise and safely support the vehicle.
  2.  
  3. Remove the wheel and tire assembly.
  4.  
  5. Release the torsion bar tension.
  6.  
  7. Remove the cotter pin and castellated nut which retains the ball joint to the steering knuckle.
  8.  
  9. Remove the lower ball joint-to-lower control arm and strut rod.
  10.  
  11. Remove the ball joint.
  12.  



Click image to see an enlarged view

Fig. Lower ball joint P'up and Amigo shown, Trooper and Rodeo similar

To install:

  1. Install the lower ball joint by mounting the joint to the lower control arm and torque the bolts to 45 and 1956 ft. lbs. (61 and 1976 Nm) for 2WD or to 68 and 1983 ft. lbs. (93 and 19113 Nm) for 4WD.
  2.  
  3. Install the ball joint stud into the steering knuckle and install the castellated nut and torque it to 101 and 19116 ft. lbs. (137 and 19157 Nm) for 2WD or to 87 and 19111 ft. lbs. (117 and 19137 Nm) for 4WD and just enough additional torque to align the cotter pin hole with a castellation on the nut. Install a new cotter pin.
  4.  
  5. Lubricate the lower ball joint through the grease fitting.
  6.  
  7. Adjust the torsion bar tension.
  8.  
  9. Install the wheel assembly and lower the vehicle.
  10.  

 
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