Duramax Brake Fluid Service.
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Duramax Brake Fluid Service.

  1. #1
    Senior Member Luvnlife's Avatar
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    Default Duramax Brake Fluid Service.

    What does this entail? Suck out the fluid, replace with new then bleed the brakes to get the old fluid out of the lines? Thanks

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    AKA Blownjet 468 Blowncat 509's Avatar
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    what I usually do is use a power bleeder- can be as simple as a converted hudson sprayer
    (that's what my blue-point one is) or you can use a vacuum style. either way, just don't
    let the master go dry- just bleed all 4 corners untill you have nice clear brake fluid coming
    out the bleeder screws, and your done!

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    Senior Member Luvnlife's Avatar
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    So basically you are just bleeding the brakes to get fresh fluid at the wheels.

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    Senior Member Luvnlife's Avatar
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    My manual says to use Dot 3. Can I use Dot 4? Is it better? Does it matter?

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    Senior Member jorndy's Avatar
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    Quote Originally Posted by Luvnlife View Post
    My manual says to use Dot 3. Can I use Dot 4? Is it better? Does it matter?
    Better not mix them, differance in the formulation, silicone or something or some other additives. Somebody out here will know more about this than I do. Havent screwed with brake systems in a few years,the stuff I have now is all air brakes.

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    Senior Member Luvnlife's Avatar
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    Quote Originally Posted by jorndy View Post
    Better not mix them, differance in the formulation, silicone or something or some other additives. Somebody out here will know more about this than I do. Havent screwed with brake systems in a few years,the stuff I have now is all air brakes.
    Even if I'm changing out all the fluid, resevoir and lines?

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    New here Beer:30's Avatar
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    Quote Originally Posted by jorndy View Post
    Better not mix them, differance in the formulation, silicone or something or some other additives. Somebody out here will know more about this than I do. Havent screwed with brake systems in a few years,the stuff I have now is all air brakes.
    Dot 3 and 4 are fine to mix. Just don't mix dot FIVE (5), which is SILICONE. They don't mix at all. I have used them all and have settled into the Valvoline Dot 4 SYNTHETIC. Real nice stuff. Still bubbles paint, so be careful.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    New here Beer:30's Avatar
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    Quote Originally Posted by Luvnlife View Post
    Even if I'm changing out all the fluid, resevoir and lines?
    If you WANT to convert to Dot 5, yes, do it all the way through. You just have to make sure you do the future servicing YOURSELF. If someone else pours OTHER THAN dot 5 in there, you're hosed.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  11. #9
    Senior Member Luvnlife's Avatar
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    Quote Originally Posted by Beer:30 View Post
    Dot 3 and 4 are fine to mix. Just don't mix dot FIVE (5), which is SILICONE. They don't mix at all. I have used them all and have settled into the Valvoline Dot 4 SYNTHETIC. Real nice stuff. Still bubbles paint, so be careful.
    Thanks Beer. I went to three places looking for some good quality brake fluid but all they had was 3 in cheap offname brands. Probably all the same stuff anyway Guess I'll try one of those good stores like PepBoys

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