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DOT 5 brake fluid

Discussion in 'The Garage' started by skyblazer, Aug 18, 2002.

  1. skyblazer

    skyblazer 1/2 ton status

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    Anyone use DOT 5? I read somewhere that some street rodders used it because it worked well and it won't attack painted surfaces like regular brake fluid does. I can't get my old style master cyl. resevior to quit seeping at the lid and my newly painted fenders, frame etc are taking a punishment!
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Not to sound like a jerk, but I'd recommend solving the problem rather than the symptom... </font color>
     
  3. DieselDan

    DieselDan 1/2 ton status

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    Actually you're referring to Silicone base brake fluid. (There is also dot 5 mineral based racing brake fluid). Silicone brake fluid has been used by the Army since the early eighties. If you want to use it you must purge the brake system with Alcohol (Methyl IIRC) as mineral and silicone turn to a jelly. Silicone tends to hold air bubles which can be a pain.... Oh ya, the stuff ain't cheap, but you don't have to replace it every other year. /forums/images/icons/wink.gif
     
  4. bablazer73

    bablazer73 1/2 ton status

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    dot 5 has been around for several years. it doesn't hold water in the brakes system, and also stands up to the heat of racing. reduces brake fade from heated fluid. BUT it cannot ever be mixed with any other kind of fluid. system must be completly flushed clean.
     
  5. m j

    m j 1/2 ton status

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    Re: DOT 5 brake fluid *DELETED*

    Post deleted by m j
     
  6. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Wow! Great info! I had no clue about 70% of that stuff...
     
  7. m j

    m j 1/2 ton status

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    it is from an SCCA racer
     
  8. Gandolf

    Gandolf 1/2 ton status

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    Thanks for the excellent info. I won't be able to ignore my brake systems anymore. /forums/images/icons/grin.gif
     
  9. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Good read. thanks for posting. I knew some of the stuff but didn't know near that much. I feel I have learned something today.
    FYI Its proper to include the authors name and a link it if its on the web on stuff like this.
     
  10. chulisohombre

    chulisohombre 1/2 ton status

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    there were only a couple of sentenses in that hole post i understood.i flunked chemistry so thats probably a good reason for this. /forums/images/icons/laugh.gif
     
  11. m j

    m j 1/2 ton status

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    it is from a long since gone email list
     
  12. skyblazer

    skyblazer 1/2 ton status

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    Wow mj, great info! That is the stuff I needed. I had read about silicone based DOT 5 fluids in a magizine once and could not find any more info. OUTSTANDING info on the various grades as well. I plan to stick with good old DOT 4. As for "fixing the problem, not the symtom" (Shaggy), I have tried two master cylinders and two covers with no success. It still seeps out of the top after bouncing the truck around for a few days. Anyone have better luck with the old cast style (1972 K5) brake reseviors? Any ideas? Thanks again for the info....good stuff!!!
     

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