GM Cavalier/Sunfire 1995-2000 Repair Guide

Proportioner Valves

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REMOVAL & INSTALLATION



See Figure 1

  1. Remove the proportioner valve caps. It may be necessary to remove the master cylinder reservoir.
  2.  
  3. Remove and discard the valve cap O-rings.
  4.  
  5. Remove the proportioner valve piston springs, then remove the valve pistons using needle-nose pliers. Be careful not to scratch or damage the piston stems.
  6.  
  7. Remove the valve seals from the proportioner valve pistons.
  8.  
  9. Clean all parts in clean denatured alcohol, then dry with compressed air. Inspect the valve pistons for corrosion or deformation and replace if necessary.
  10.  



Click image to see an enlarged view

Fig. Fig. 1: Removal of the proportioner valves

To install:
  1. Lubricate new proportioner valve cap O-rings and valve seals with the silicone grease given in the repair kit. Also, lubricate the stem of the proportioner valve pistons.
  2.  
  3. Place new proportioner valve seals on the proportioner valve pistons with the seal lips facing upward toward the proportioner valve cap.
  4.  
  5. Position the proportioner valve pistons and seals into the master cylinder body.
  6.  
  7. Place new proportioner valve cap O-rings in the grooves in the proportioner valve caps.
  8.  
  9. Install the valve caps in the master cylinder body, then tighten the caps to 20 ft. lbs. (27 Nm).
  10.  
  11. If removed, install the master cylinder reservoir.
  12.  

 
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