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14 bolt disk brakes

Discussion in 'The Garage' started by dheavychevy38, Sep 22, 2004.

  1. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    so i have everything in the 60 and the 14 bolt disk conversion in a 89 k5 i vaccum bleed the brakes then to make sure i did it the old fashion way and now no rear brakes?
    i thought in some situations you could run the stock master and porportioning valve /forums/images/graemlins/confused.gif

    i think the valve shifted on me and cut off the rear brakes /forums/images/graemlins/thinking.gif
     
  2. jwduke

    jwduke 1/2 ton status

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    Your proportioning valve has a bypass in it, that has bypassed because of loss of fluid to your rear brakes. If you look at a your proportioning valve, you will see a "plunger", push this plunger back in. (It will be hard to do.) Then power bleed your brakes. Good luck.
     
  3. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    thanks but i have order a adjustable one from summit and replumbed the lines /forums/images/graemlins/thumb.gif
     
  4. jwduke

    jwduke 1/2 ton status

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    I replaced mine with a proportioning valve from a '80 Vette. It is a disc/disc proportioning valve. Cost about the same & no replumbing hassles.
     
  5. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    maybe i will look in to that cause i really don't like haveing all rigged i know it's right but don't like how it looks /forums/images/graemlins/thumb.gif
     
  6. Muddytazz

    Muddytazz 1 ton status

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    I'm still running my stock prop valve in my burb. Only thing I had to do was take her in to have it pressure bled and its been working flawlessly every since.

    3/4ton m/c and booster
    stock 1/2ton prop valve
    stock lines
    caddy calipers in the rear
     
  7. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    whatdo you mean by power bleed ?
     
  8. Muddytazz

    Muddytazz 1 ton status

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    The tire shop puts a pressurized cap on your m/c and pressurizes your brake system and forces all the air out under compressed air.
     
  9. hawkeye649

    hawkeye649 1/2 ton status

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    Dunno 'bout burbs, but I think K5's have problems with rear wheel lock up. I guess your millage may vary, depending on wheel size? More rolling force...
     
  10. Muddytazz

    Muddytazz 1 ton status

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    I don't think its so much a wheelbase issue as its more of a vehicle weight issue no matter what the vehicle.
     
  11. surpip

    surpip 1 ton status

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    my rears dont lock up at all /forums/images/graemlins/dunno.gif
     
  12. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    all right many things to try i think i will just get a valve for a 4 wheel disk try that if i'm not happy than i will try after market

    if the rears lock up thats good that way you can stilll stear /forums/images/graemlins/screwy.gif /forums/images/graemlins/yikes.gif

    oh yeah 38.5 meats is what i am running /forums/images/graemlins/peace.gif
     
  13. hawkeye649

    hawkeye649 1/2 ton status

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    [ QUOTE ]
    I don't think its so much a wheelbase issue as its more of a vehicle weight issue no matter what the vehicle.

    [/ QUOTE ]

    Funny, don't remember mentioning wheel base? I was thinking weight, and rolling force (per say, 38's probably wont lock up on tar, but 31's would.) /forums/images/graemlins/thinking.gif
     
  14. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    89 k5 yeah i can see what you mean lock the meats up at the stop light always gets those over priced cars out of the way /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif
     
  15. gravdigr

    gravdigr 1/2 ton status

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    [ QUOTE ]
    if the rears lock up thats good that way you can stilll stear

    [/ QUOTE ]

    I really hope you were kidding...I think you were.

    For anyone that doesn't know locking the rear tires is very bad, especially on main roads. If you lock the rear tires and not the front the rear of the vehicle will swing around on you throwing you totally out of control. That's why vehicles have proportioning valves to put more brake pressure on the front brakes. For 1 the front wheels need to do more of the stopping power than the rear due to weight transfer when stopping. And 2 if you lock the front wheels you do lose steering but your vehicle stays straight nose pointing forward lessening the chance of rolling the vehicle.

    This safety announcement brought to you by gravdigr, you don't want to be seeing me soon /forums/images/graemlins/wink.gif
     
  16. hawkeye649

    hawkeye649 1/2 ton status

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    Amen /forums/images/graemlins/bow.gif
    Don't want no nun gat no tires dun locking up no way no how. /forums/images/graemlins/shame.gif /forums/images/graemlins/waytogo.gif
     
  17. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    [ QUOTE ]
    I replaced mine with a proportioning valve from a '80 Vette. It is a disc/disc proportioning valve. Cost about the same & no replumbing hassles.

    [/ QUOTE ]

    I know I need a new prop valve.. so maybe I should try this one.... all lines mated right up? same shape as the pickup ones?
     
  18. gravdigr

    gravdigr 1/2 ton status

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    [ QUOTE ]
    Amen /forums/images/graemlins/bow.gif
    Don't want no nun gat no tires dun locking up no way no how. /forums/images/graemlins/shame.gif /forums/images/graemlins/waytogo.gif

    [/ QUOTE ]

    If I understood that what does it make me?

    hick
    hillbilly
    redneck or jus a good translator /forums/images/graemlins/tongue.gif
     
  19. hawkeye649

    hawkeye649 1/2 ton status

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    Cracker... read the sig!

    |
    |
    |
    \/
     
  20. jwduke

    jwduke 1/2 ton status

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    It is a exact match. I think I can find the part # if you want it.
     

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