GM Corvette 1984-1996 Repair Guide

Proportioning Valve

Print

REMOVAL & INSTALLATION



See Figures 1 and 2

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the master cylinder assembly from the vehicle.
  4.  
  5. Remove the warning switch assembly from the master cylinder.
  6.  
  7. Remove the end plug and O-ring from the master cylinder.
  8.  
  9. For 1984-91 vehicles, remove the proportioning valve with the ground spring attached.
  10.  
  11. For 1992-96 vehicles, remove the electrical bias spring, then remove the proportioning valve assembly along with the O-ring and spacer.
  12.  

If necessary, gently tap the cylinder body against a piece of wood to dislodge the proportioning valve assembly.

  1. Do not disassemble the proportioning valve, it is serviced only as an assembly. Also, do not clean the proportioning valve with any solution as the internal components are lubricated with a special grease.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the master cylinder components, including the proportioning valve-1984-91 vehicles



Click image to see an enlarged view

Fig. Fig. 2: Location of the proportioning valve and related components-1992-96 vehicles

To install:
  1. Lubricate the valve and cylinder bore with clean brake fluid, then install the valve into the master cylinder and bottom it into the bore. On 1984-91 vehicles, the proportioning valve should be installed with the open end first. On 1992-96 vehicles, the valve should be installed with the capped end first.
  2.  
  3. Install a new O-ring over the end plug, then install the spring followed by the end plug.
  4.  
  5. Tighten the proportioning valve end plug to 18 ft. lbs. (25 Nm).
  6.  
  7. Install the warning switch assembly, hand-tighten only.
  8.  
  9. Install the master cylinder assembly to the vehicle.
  10.  
  11. Connect the negative battery cable and properly bleed the hydraulic brake system.
  12.  

 
label.common.footer.alt.autozoneLogo