ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996

Lower Control Arm

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REMOVAL & INSTALLATION



Except Hombre

See Figure 1



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Fig. Fig. 1: Lower control arm and related suspension components- Trooper shown

  1. Raise and safely support the vehicle on jackstands.
  2.  
  3. Remove the wheel and tire assembly.
  4.  
  5. Remove the strut bar from the control arm and front of the vehicle, if equipped.
  6.  
  7. Disconnect the stabilizer bar from the lower control arm, if equipped.
  8.  
  9. Remove the torsion bar.
  10.  
  11. Disconnect the shock absorber from the lower control arm.
  12.  
  13. Remove the lower ball joint from the lower control arm joint.
  14.  
  15. Remove the retaining nut and drive out the bolt holding the lower control arm to the chassis with a soft metal drift. Remove the lower control arm from the vehicle.
  16.  

To install:

When reinstalling front end components, it is best to snug all the bolts and nuts first, then lower the car so that there is weight on the suspension when final torque adjustments are made.

  1. If replacing the control arm assembly, install the lower ball joint to the replacement lower control arm.
  2.  
  3. Mount the lower control arm to the frame. Drive the retainer bolt into position carefully. Use care not to damage the serrated portions. Tighten the nut on the end of the pivot bolt to 145-196 ft. lbs. (188-255 Nm).
  4.  
  5. Install the stabilizer bar to the lower control arm.
  6.  
  7. Place the washers and bushings on the strut rod and install it through the frame bracket. Install the second set of washers and bushings on the strut rod together with the lockwashers and nut. Leave the nut loose temporarily.
  8.  
  9. Install the strut rod to the lower control arm and tighten the bolts.
  10.  
  11. Assemble the lower ball joint to the steering knuckle.
  12.  
  13. Install the wheel assembly and lower the vehicle.
  14.  
  15. Check and adjust the front end alignment, as necessary.
  16.  

Hombre

See Figure 2



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Fig. Fig. 2: Lower control arm assembly-Hombre

  1. Raise and safely support the vehicle on jackstands.
  2.  
  3. Remove the wheel and tire assembly from the vehicle.
  4.  
  5. Remove the coil spring from the vehicle. For details, refer to the procedure earlier in this section.
  6.  
  7. Remove the brake caliper and support it from the vehicle using a coat hanger or wire. Make sure the brake line is not stretched or damaged and that the caliper's weight is NOT supported by the line.
  8.  
  9. Remove the cotter pin and retaining nut from the upper ball joint.
  10.  
  11. Position J-23742 or an equivalent ball joint separator tool between upper joint stud and the upper joint/control arm. Use the tool to separate the ball joint from the steering knuckle. Pull the steering knuckle free of the ball joint after removal.
  12.  

After separating the steering knuckle from the upper ball joint, be sure to support the steering knuckle/hub assembly to prevent damaging the brake hose. Also, support the lower control arm and guide it out of the opening in the splash shield.

  1. Remove the jam nuts from the back of each lower control arm pivot bolt.
  2.  
  3. Remove the pivot bolts (noting the direction in which they are facing), then remove the control arm from the vehicle.
  4.  

To install:
  1. Position the control arm to the vehicle.
  2.  
  3. Install the jam nuts and tighten to 67 ft. lbs. (87 Nm).
  4.  
  5. Remove the support from the steering knuckle, then install the ball joint to the knuckle. Make sure the joint is seated, then install the stud nut and tighten the nut. Install a new cotter pin.
  6.  

When installing the cotter pin, never loosen the castle nut to expose the cotter pin hole.

  1. Reposition and secure the brake caliper.
  2.  
  3. Install the tire and wheel assembly.
  4.  
  5. Remove the jackstands and carefully lower the vehicle.
  6.  
  7. Check and adjust the front end alignment, as necessary.
  8.  

BUSHING REPLACEMENT



See Figures 3, 4, 5 and 6



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Fig. Fig. 3: Nut, bolt and pipe arrangement for bushing removal and installation



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Fig. Fig. 4: Removing the front control arm bushing



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Fig. Fig. 5: Removing the rear control arm bushing



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Fig. Fig. 6: Installing a control arm bushing

  1. Remove the control arm from the vehicle.
  2.  
  3. Mount the control arm in a soft jawed vise. Remove the pivot shaft nuts and washers.
  4.  
  5. Use a control arm bushing fixture (C-clamp like tool) along with a slotted washer and a piece of pipe (slightly larger than the bushing) and press out the old bushing. A large nut and bolt can also be used to remove and install lower control arm bushings.
  6.  
  7. Clean the inside bushing contact surfaces of rust and old rubber.
  8.  

To install
  1. Apply a light coating of grease to both the replacement busing and bushing contact surfaces on the control arm.
  2.  
  3. Position a pivot shaft to the control arm and install the bushing using the fixture tool, washer and a length of pipe with the same outer diameter as the bushing. Tighten the tool until the bushing is properly seated. Loosely install the bushing retaining nuts and washers.
  4.  
  5. Install the control arm on the vehicle.
  6.  

 
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