GM Caprice 1990-1993 Repair Guide

Front End Alignment

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See Figures 1, 2 and 3



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Fig. Fig. 1: Caster, Camber and Toe-In diagrams



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Fig. Fig. 2: Caster and camber adjustment



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Fig. Fig. 3: Toe-in adjustment diagram

CAMBER



Camber is the inward or outward tilting of the front wheels from the vertical. When the wheels tilt outward at the top, the camber is said to be positive (+). When the wheels tilt inward at the top, the camber is said to be negative (-). The amount of tilt is measured in degrees from the vertical and this measurement is called the camber angle.

CASTER



Caster is the tilting of the front steering axis either forward or backward from the vertical position. A backward tilt is said to be positive (+) and a forward tilt is said to be negative (-).

TOE-IN



Toe-in is the turning in of the front wheels. The actual amount of toe-in is normally only a fraction of a degree. The purpose of toe-in is to ensure parallel rolling of the front wheels. (Excessive toe-in or toe-out will cause tire wear.)

CASTER/CAMBER ADJUSTMENT



Caster and camber can be adjusted by moving the position of shims from the upper control arm shaft. Moving the shims from the forward/rearward position on the shaft adjusts caster. Adding or removing an equal amount of shims from the front and rear of the shaft adjusts camber.

TOE-IN ADJUSTMENT



Loosen the clamp bolts at each of the steering tie rod adjustable sleeves. With the steering wheel set straight ahead, turn the adjusting sleeves to obtain the proper adjustment.

See Figure 4



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Fig. Fig. 4: Wheel Alignment

 
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