GM Metro/Sprint 1985-1993 Repair Guide

Coil Springs

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REMOVAL & INSTALLATION



1987-88 Sprint

See Figure 1



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Fig. Fig. 1: Rear axle assembly - 1987-88 Sprint

  1. Raise and support the vehicle safely.
  2.  
  3. Place a jack under the rear axle and raise it slightly.
  4.  
  5. As required, disconnect the brake pipes and parking brake cable.
  6.  
  7. Remove the rear shock absorbers.
  8.  
  9. Disconnect the lateral rod.
  10.  
  11. Lower the rear axle until all tension is remove from the springs.
  12.  
  13. Remove the springs from the vehicle.
  14.  

To install:
  1. Install the springs in the vehicle with the flat side upward. Ensure the bottom of the spring is properly seated in the spring pocket on the rear axle.
  2.  
  3. Raise the rear axle to tension the springs.
  4.  
  5. Install the lateral rod and tighten bolt to 32-50 ft. lbs. (45-70 Nm).
  6.  
  7. Install the shock absorbers. Tighten lower bolt to 32-50 ft. lbs. (45-70 Nm). Tighten upper nut to 13-20 ft. lbs. (18-28 Nm).
  8.  
  9. Connect the brake pipes and parking brake cable, as required.
  10.  
  11. Remove the jack under the rear axle and lower the vehicle.
  12.  

1989-93 Metro
  1. Raise and support the vehicle safely.
  2.  

To facilitate the toe-in adjustment after reinstallation, confirm which one of the lines stamped on the washer is in the closest alignment with the stamped line on the control rod. If not marked, add the alignment marks.

  1. Remove the control rod inside bolt (body center side).
  2.  
  3. Remove the outside (wheel side) of the control rod from the rear knuckle stud bolt.
  4.  
  5. Loosen the rear mount not on the suspension arm, but do not remove the bolt.
  6.  
  7. Loosen the front nut of the suspension arm.
  8.  
  9. Loosen the lower mount nut on the knuckle. Place a jack under the suspension arm to prevent it from lowering and remove the lower mount nut on the knuckle.
  10.  
  11. Raise the jack placed under the suspension arm enough to allow the removal of the lower mount bolt of the knuckle.
  12.  
  13. Move the brake drum/backing plate toward the outside of the vehicle body so as to separate the lower mount of the knuckle from the suspension arm. Then lower the jack gradually and remove the coil spring.
  14.  
  15. Remove the suspension arm.
  16.  

To install:
  1. Install the 4 mounting bracket bolts. Torque the mounting bracket bolts to 33 ft. lbs. (45 Nm).
  2.  
  3. Install the rear and front mounting nuts, but do not torque them at this time.
  4.  

Make sure that the front mounting washer is installed in the proper direction.

  1. Place the jack under the suspension arm.
  2.  
  3. Install the coil spring on the spring seat of the suspension arm then raise the suspension arm. When seating the coil spring, mate the spring end with the stepped part of the suspension arm spring.
  4.  
  5. Install the lower knuckle mount bolt. Torque the bolt to 37 ft. lbs. (50 Nm).
  6.  
  7. Remove the jack from under the suspension arm.
  8.  
  9. Install the inside and outside control rod bolts, but do not tighten them at this time.
  10.  
  11. Install the wheel assemblies and lower the vehicle.
  12.  
  13. Install the control rod inside and outside nut and torque them to 59 ft. lbs. (80 Nm).
  14.  

When tightening the nuts, it is most desirable to have the vehicle off the hoist and in a non-loaded state. Also when tightening the inside nut, align the line stamped on the body with the line on the washer as confirmed before removal or align the matchmarks if marked.

  1. Install the suspension arm front and rear nuts. Torque the front nuts to 44 ft. lbs. (60 Nm) and the rear nuts to 37 ft. lbs. (50 Nm). After tightening the suspension arm outer nut, make sure that the washer is not tilted.
  2.  
  3. Check the rear wheel alignment.
  4.  

 
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