Brake bleeding gm proportioning valve
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  1. #1
    24v
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    Brake bleeding gm proportioning valve

    As above
    I have a gm brake proportioning valve and can't get any fluid from the rear calipers. All worked fine until I changed from drums to calipers. Master cylinder and rear calipers in good working order. Front calipers have fluid. But nothing from rear. Googled and searched how to reset the valve which has been working properly until I modified the reR system. but so far no luck

    Any advice would be great.
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    Official RnS Addict mygasser's Avatar
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    the shuttle valve inside may have gone one way and need resetting
    need a job done on your project? i may be able to help.

  4. #3
    24v
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    I think that's what has happened but have tried a few of the methods I have found on the net and still no fluid to the rear.

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    german8rcoupe is offline
    Do away with it now you have disc /disc.

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    24v
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    Join the pipes and bypass it or a fit a manual proportioning valve?

  8. #6
    Official RnS Addict mygasser's Avatar
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    just join the pipes to bypass it mate. if you have issues with rear wheels locking then add a proportioning valve then. no point spending the money if it doesn't need it. make sure you don't test it in heavy traffic though for obvious reasons
    need a job done on your project? i may be able to help.

  9. #7
    24v
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    Thanks
    Will I join the front pipes also with a tee or are they ok?
    I will stay away from solid objects while testing also..
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  10. #8
    Official RnS Addict mygasser's Avatar
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    use a 't' for the front so the valve is totally removed.
    need a job done on your project? i may be able to help.

  11. #9
    24v
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    Ok will do
    thanks
    Work to live don't live to work....
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  12. #10
    24v
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    The local brake guy has metric only
    My pipe with a vernier is 11mm ouside roughly and the front for the T piece looks 8mm
    Is it imperial or unf thread on the chevy brake parts?
    Work to live don't live to work....
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