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Proportioning Valve?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by sinchphoto, Jan 8, 2002.

  1. sinchphoto

    sinchphoto 1/2 ton status

    Mar 7, 2000
    Likes Received:
    Southern California
    I've heard this term before but dont know what it is. I'm having a brake problem. Pedal goes all the way down. Lines have been bled and Theres no kinks. What is the P valve for and what does it do? Does it have anything to do with the brake pedal? Any advice will help, Thanks.
  2. Thunder

    Thunder 3/4 ton status

    Jul 20, 2000
    Likes Received:
    Northeast Nevada
    The Proportioning Valve regulates the fluid pressure between the front and rear brakes. It basicly trys to keep the front brakes from locking up before the rears so you can still steer in a hard braking situation.
    Your problem with the pedal going to the floor sounds like the master cylinder is going bad.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

    <font color=blue>Nevada... Where the pavement ends and the west begins

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