Thank you, color is the answer.
I thought maybe since a prior leak caused paint damage and was repaired a
change to DOT 5 might have been made.
I'll leave it alone for now and add DOT 4 for top off if necessary.
Thank you.
Bob
----- Original Message -----
From: "Ashford Little" <70tr6@mindspring.com>
To: "Joseph Grant" <grant@bowtie6.com>
Cc: "'Bob'" <rpeglow@optonline.net>; <6pack@autox.team.net>
Sent: Thursday, January 24, 2008 6:09 AM
Subject: Re: [6pack] brake fuild
> One thing to consider in the eternal silicon vs. DOT4 argument is the
> condition of the brake system prior to switching. I liken it to
> changing from dino oil to synthetic with a motor that has 80 thousand
> miles on it. The motor will most likely start to leak oil in places
> it did not previously and I doubt that you'll receive any rewards in
> terms of longevity at this point. I think the brakes are a similar
> situation. If the rubber components in your braking system are not
> relatively new then switching to DOT5 may result in some negative
> reactions. I don't think there is any chemical reaction; I just think
> that the chemical makeup of DOT5 might be similar to synthetic motor
> oil in that it will more easily leak.
>
> Now, I must admit a few things for full and fare disclosure. #1, I'm
> not an engineer and I don't play one of TV. #2, Joe is hardly the
> person I or most of us should be disagreeing with on a regular basis.
> But, #3, I redid my entire braking system about 4 years ago and took
> the opportunity to switch to DOT5 and I've had no issues whatsoever.
> I also know people who switched in mid-stream with no issues, and I
> know of one TR enthusiast who switched 20 years and 100k miles ago who
> has also not seen issue one.
>
> Now, this is subject to debate, but there is one question that is easy
> to answer - and that is what type of fluid you have in your car now.
> If the brake fluid is golden in color then you've got DOT4. If the
> fluid is purple, blue or some other funny color then you've got DOT5.
>
> My .02
>
>
> Ashford Little
> 6-Pack Membership Secretary
> '70 TR6
>
>
>
>
> On Jan 24, 2008, at 8:53 AM, Joseph Grant wrote:
>
> > Do what you like but I have a friend who owned a pristine TR250. He
> > switched to silicone fluid and after several months started having
> > issues
> > with his brakes. Eventually they ended up failing. There are some
> > adverse
> > reaction between the silicone and the rubber used in the master
> > cylinder and
> > the rest of the braking system. I realize there are many folks that
> > use it
> > and swear by it, but I had a chance to see firsthand what happened
> > to my
> > friend's car soon after conversion to silicone fluid.
> >
> > He ended up having to replace the entire system at quite a bit of a
> > cost.
> > For me, that is just not worth the risk. I don't use it.
> >
> > Joe
> > '72 TR6 - CC77169
> > http://www.bowtie6.com/
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