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Thread: Brake fluid flush

  1. #11
    Senior Member F6Bster's Avatar
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    [QUOTE=Radical Taz;184846]B4 and after of clutch fluid I changed in July. Brake fluid was just as bad, last changed in 2016 when recall was done.

    Wow!!!! That was some nasty stuff!!!
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  2. #12
    Senior Member Radical Taz's Avatar
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    Yea it was bad.
    Question....so how does it get so dirty in a sealed system. There is no carbon due to combustion or clutch fibers or wear material.

  3. #13
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    Quote Originally Posted by Radical Taz View Post
    Question....so how does it get so dirty in a sealed system. There is no carbon due to combustion or clutch fibers or wear material.
    Basically...The world isn't perfect! All sealed systems are "open" a little because all matter has holes. The brake systems rubber lines and each connection point allows a tiny amount of air in and the air has a small amount of moisture in it. Over time enough moisture collects to break down the brake fluid and cause rust in the system. The break down process accelerates over time because more moisture in the fluid lowers the boiling point of the brake fluid, which causes more air/moisture in through the rubber lines, and so-on and so-on.
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  4. #14
    Senior Member Radical Taz's Avatar
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    Thanks for the reply Steve, it’s good to learn something new each day.

  5. #15
    Senior Member willtill's Avatar
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    What is mind blowing is the countless cars and trucks on the road today that have NEVER had a brake fluid flush. Mainly they'll get a bleed when getting new brakes installed, but never a complete flush. There's a lot of very nasty looking brake fluid out there....


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  6. #16
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    Quote Originally Posted by willtill View Post
    What is mind blowing is the countless cars and trucks on the road today that have NEVER had a brake fluid flush. Mainly they'll get a bleed when getting new brakes installed, but never a complete flush. There's a lot of very nasty looking brake fluid out there....
    I've often wondered about that myself. I know my VW GTI calls for a brake fluid flush every 3 years. It's a 2013 and I've had it done twice.

  7. #17
    Senior Member F6Dave's Avatar
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    Quote Originally Posted by willtill View Post
    What is mind blowing is the countless cars and trucks on the road today that have NEVER had a brake fluid flush. Mainly they'll get a bleed when getting new brakes installed, but never a complete flush. There's a lot of very nasty looking brake fluid out there....
    True, but braking system failures are virtually unheard of, so those systems must be very tolerant of poor maintenance, or none at all. To some degree brake fluid isn't unlike motor oil and air filters, which can look ugly and still do a good job.

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