Isuzu Cars and Trucks 1981-1991

Coil Springs

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REMOVAL AND INSTALLATION
RWD I-Mark and Impulse
  1. Raise the car and safely support it with jackstands. Remove the wheel.
  2.  
  3. Remove the tie rod end cotter pin and castle nut. Discard the cotter pin.
  4.  
  5. Use a suspension fork to separate the tie rod end from the steering knuckle.
  6.  
  7. Remove the lower shock absorber bolt and push the shock up as far as possible.
  8.  
  9. Remove the stabilizer bar bolt and grommet assembly from the lower control arm.
  10.  
  11. Remove the upper brake caliper bolt and slide the hose retaining clip back about 1 / 2 in. (13mm).
  12.  
  13. Place the lifting pad of a hydraulic floor jack under the outer extreme of the control arm and raise the lower control arm until it is level.
  14.  


CAUTION
Secure a safety chain through one coil near the top of the spring and attach it to the upper control arm to prevent the spring from coming out unexpectedly. The coil spring will come out with a lethal force, so don't take any chances.

  1. Loosen the lower ball joint lock nut until the top of the nut is flush with the top of the ball joint. Using tool J26407 or equivalent, disconnect the lower ball joint from the steering knuckle.
  2.  
  3. Remove the hub assembly and steering knuckle from the lower ball joint and support with a wire or rope out of the way.
  4.  
  5. Pry the lower control arm down, using extreme caution so as not to injure yourself. Remove the spring.
  6.  



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Fig. Using a hydraulic jack to control coil spring



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Fig. Front suspension components RWD Impulse



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Fig. Front suspension components RWD I-Mark

To install:


CAUTION
Properly seat the spring and use the safety chain. Use the hydraulic jack to compress the new spring until the control arm is stable.

Torque the ball joint lock nut to 58 ft. lbs. Torque the lower shock absorber mounting nuts to 25 ft. lbs. (34 Nm).

  1. Install the spring and pry the lower control arm up, using extreme caution so as not to injure yourself!
  2.  
  3. Install the hub assembly and steering knuckle to the lower ball joint.
  4.  
  5. Tighten the lower ball joint lock nut until the top of the nut is flush with the top of the ball joint.
  6.  
  7. Install the upper brake caliper bolt.
  8.  
  9. Install the stabilizer bar, bolts and grommet assembly to the lower control arm.
  10.  
  11. Install the lower shock absorber bolt.
  12.  
  13. Install the tie rod end to the steering knuckle.
  14.  
  15. Install the tie rod end cotter pin and castle nut.
  16.  
  17. Install the wheels and lower the vehicle.
  18.  

FWD I-Mark Impulse Stylus

Refer to "MacPherson Strut" overhaul for specific coil spring removing procedures.

All Trucks
2-WHEEL DRIVE
  1. Raise and safely support the vehicle.
  2.  
  3. Remove the adjusting bolt from the height control arm.
  4.  
  5. Mark the location and remove the height control arm from the torsion bar and the third crossmember.
  6.  
  7. Mark the location and withdraw the torsion bar from the lower control arm.
  8.  

To install:

  1. To install, apply a generous amount of grease to the serrated ends of the torsion bar.
  2.  
  3. Hold the rubber bumpers in contact with the lower control arm. Raise the vehicle up under the lower control arm to accomplish this.
  4.  
  5. Insert the front end of the torsion bar into the control arm.
  6.  
  7. Install the height control arm in position so it's end is reaching the adjusting bolt. Be sure to lubricate the part of the height control arm that fits into the chassis with grease.
  8.  
  9. Install a new cotter pin in the control arm.
  10.  
  11. Turn the adjusting bolt to the location marked before removal.
  12.  
  13. Lower the vehicle and check the vehicle height.
  14.  



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Fig. Front suspension components 2WD Trucks

4-WHEEL DRIVE
  1. Raise and safely support the vehicle.
  2.  
  3. Remove the adjusting bolt from the height control arm.
  4.  
  5. Mark the location and remove the height control arm from the torsion bar and the 3rd crossmember.
  6.  
  7. Mark the location and withdraw the torsion bar from the lower control arm.
  8.  

To install:

  1. To install, apply a generous amount of grease to the serrated ends of the torsion bar.
  2.  
  3. Hold the rubber bumpers in contact with the lower control arm. Raise the vehicle up under the lower control arm to accomplish this.
  4.  
  5. Insert the front end of the torsion bar into the control arm.
  6.  
  7. Install the height control arm in position so it's end is reaching the adjusting bolt. Be sure to lubricate the part of the height control arm that fits into the chassis with grease.
  8.  
  9. Install a new cotter pin in the control arm.
  10.  
  11. Turn the adjusting bolt to the location marked before removal.
  12.  
  13. Lower the vehicle and check the vehicle height.
  14.  



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Fig. Front suspension components 4WD Trucks



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Fig. Each torsion bar is matched for Right and Left sides



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Fig. Apply grease to the end piece

 
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