Dot 5 vs Dot 3??

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  • newmaac
    XStremely XSive
    • Dec 2002
    • 369
    • San Jose, CA
    #1

    Dot 5 vs Dot 3??

    One of the answers to my earlier post on caliper paint, reccommended using Dot 5 brake fluid.
    It says right on the reservoir to use Dot 3, but in 1980 Dot 5 probably didn't even exist.
    Other than making certain to COMPLETELY flush the entire system before introducing Dot 5, is there anything that I need to be aware of?
    Are there other XSives that have made this switch?
    TIA
    Mike

    1980 SG "Angus"
    Tags: None
    • MartyA
      XS-XJ Guru
      • Jul 2002
      • 2148
      • NW PA
      #2
      If I recall, Dot 5 is silicon based, tough to pour, tough to get bubbles out, and absolutely not compatible with DOt 3-4. If you 'clean out' your brake system you will likely leave some residue of 3 in there. I would stick to 3 or 4 if I had 3 in for the past 25 years, unless you are replacing everything.
      Marty in NW PA
      Gone - 1978E - one of the first XS11 made
      Gone - 2007A FJR - the only year of Dark Red Metallic
      This IS my happy face.

        Comment

        • TopCatGr58
          Administrator
          • Jul 2002
          • 12650
          • Portsmouth, Va.
          #3
          See the following thread!

          Dot 5
          T. C. Gresham
          81SH "Godzilla" . . .1179cc super-rat.
          79SF "The Teacher" . . .basket case!
          History shows again and again,
          How nature points out the folly of men!

            Comment

            • pathfinder
              XStremely XSive(Deceased)
              • Apr 2004
              • 483
              • Houston, TX
              #4
              Do It

              See TC's post , I answered that one. Been using it for years with no problems.
              There's always a way, figure it out.
              78XS11E

                Comment

                • Renegade
                  XSive
                  • Aug 2003
                  • 62
                  • Tampa
                  #5
                  I have been using DOT5 for almost 5 years in my XS. As long as you flush *all* of the old fluid out, you will have no problems. Anytime you hear about someone having an issue with using DOT5 fluid, 99% of the time it can be traced to failure to flush the old fluid properly or seals that should have been replaced beforehand.

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