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Entirely correct.
DOT4 will be perfect for most users. DOT5 for the silicone boys. DOT5.1
is similar to DOT4 but is upgraded to more or less the same properties
(e.g. boiling point) as DOT5 but absorbs water and is compatible in
practically all classic car braking components. It is better suited to
extreme driving compared to DOT4. It may also have a harder pedal as it
is non-compressable. DOT5 is slightly compressible and can feel a bit
spongy when you are not used to it. Most won´t notice anything.
ALL brake fluids should be replaced on a regular bases, usually every 2
years, in very damp environments more often.
Kees Oudesluijs
Op 16-6-2019 om 18:15 schreef simon.lachlan@alexarevel.plus.com:
>
> When this came round last time, I did a little digging and came up
> with this, which I believe I may have inflicted on you before. It was
> written for our local (UK) club magazine but Iâ??m sure that most of it,
> if not all, is universal. Itâ??s more about what mixes with which rather
> than which rots what. If you get my meaningâ?¦.
>
> 1. All brake fluid is â??syntheticâ??â?¦itâ??s not a â??naturalâ?? product.
> 2. Most synthetic fluids are NOT silicone. They are polyethylene
> _glycol_ ether based.
> 3. DOT 3 & 4, which can be mixed, are not silicone. They are glycol.
> 4. DOT 5, which cannot be mixed with 3 or 4, is silicone. Canâ??t be
> mixed with anything!
> 5. DOT 5.1 is glycol based and cannot be mixed with DOT 5.
> 6. DOT 5.1 can be mixed with DOT 3 or 4, as both are glycol based.
>
> Simon
>
> *From:*Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Bob Spidell
> *Sent:* 16 June 2019 16:34
> *To:* healeys@autox.team.net
> *Subject:* Re: [Healeys] silicone brake fluid
>
> I've used silicone BF in my BJ8 for close to 30 years (and when I
> replaced the brake MC, 15-20 years and 80-100K miles ago, I
> disregarded the same warning). As somebody mentioned, your problem is
> symptomatic of the 'check valve'--aka 'foot valve--malfunctioning or
> damaged. I had similar problem with my brakes on a long road trip;
> had to pump the pedal a couple times on every application (for a
> couple thousand miles).
>
> We put the highly-touted Castrol BF in our 100M after a thorough
> restoration--with all-new brake system--and the fluid jelled when that
> car sat for a couple years.
>
> Side note: Most BFs are calling themselves 'synthetic' these days.Â
> Are they a new formulation, or just jumping on the bandwagon as,
> AFAIK, BF has always been synthetic (the glycols used don't occur in
> nature)?
>
> Bob
>
> On 6/16/2019 7:44 AM, Team.net wrote:
>
> I have used silicone in all my british cars for 25 years with no
> problems
>
>
> On Jun 16, 2019, at 09:31, HealeyRick <healeyrik@gmail.com
>
> Apparently, silicone can cause swelling of the seals in
> Girling and Lockheed systems: http://www.gomog.com/brakes.html
> I have a Howe hydraulic clutch in my Nasty Boy, and that also
> came with the advisory not to use silicone fluid.
>
> Rick Neville
>
> On Sun, Jun 16, 2019 at 8:24 AM Brian Drab <bgdrab@redzone.ca
>
> Last week I completed a driving tour in our BJ8. It was a
> great tour and everything ran well except for one thing.
> Â 4 or 5 times, when I used the clutch, the clutch master
> cylinder bypassed. The rest of the time it worked well. As
> I donâ??t want to be caught without a clutch at a later date
> I am changing the clutch master cylinder. I have received
> a replacement and am preparing to install it.
>
> On the box is a quick summary of the bleeding procedure
> under a warning â?? â??Using Silicon Brake fluid will void
> warrantyâ??. I have used silicon fluid for well over 10
> tears and never experienced any problems with it and have
> never seen or heard of this type of warning before. I have
> never heard of any destructive qualities of Silicon fluid.
>
> My question is â?? does anyone have any idea what it is about.
>
> For me to change to Dot4 fluid is quite a big deal as I
> would be changing out the clutch as well as the brake
> system seeing as they share a common reservoir.
>
> Iâ??d appreciate any comments on the warning.
>
> Brian Drab
>
> BJ8
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl
>
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<p>Entirely correct.</p>
<p>DOT4 will be perfect for most users. DOT5 for the silicone boys.
DOT5.1 is similar to DOT4 but is upgraded to more or less the same
properties (e.g. boiling point) as DOT5 but absorbs water and is
compatible in practically all classic car braking components. It
is better suited to extreme driving compared to DOT4. It may also
have a harder pedal as it is non-compressable. DOT5 is slightly
compressible and can feel a bit spongy when you are not used to
it. Most won´t notice anything.<br>
</p>
<p>ALL brake fluids should be replaced on a regular bases, usually
every 2 years, in very damp environments more often. <br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 16-6-2019 om 18:15 schreef
<a class="moz-txt-link-abbreviated"
href="mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexarevel.plus.com</a>:<br>
</div>
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cite="mid:000a01d5245e$c94907f0$5bdb17d0$@alexarevel.plus.com">
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<div class="WordSection1">
<p class="MsoNormal"><span
style="color:windowtext;mso-fareast-language:EN-US">When
this came round last time, I did a little digging and came
up with this, which I believe I may have inflicted on you
before. It was written for our local (UK) club magazine but
Iâ??m sure that most of it, if not all, is universal. Itâ??s
more about what mixes with which rather than which rots
what. If you get my meaningâ?¦.<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">All
brake fluid is â??syntheticâ??â?¦itâ??s not a â??naturalâ??
product.<o:p></o:p></span></li>
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">Most
synthetic fluids are NOT silicone. They are <span
style="color:#222222">polyethylene <u>glycol</u> ether
based.</span><o:p></o:p></span></li>
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">DOT
3 & 4, which can be mixed, are not silicone. They are
glycol.<o:p></o:p></span></li>
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">DOT
5, which cannot be mixed with 3 or 4, is silicone. Canâ??t
be mixed with anything!<o:p></o:p></span></li>
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">DOT
5.1 is glycol based and cannot be mixed with DOT
5.<o:p></o:p></span></li>
<li class="MsoNoSpacing" style="mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif">DOT
5.1 can be mixed with DOT 3 or 4, as both are glycol
based.<o:p></o:p></span></li>
</ol>
<p class="MsoNormal"><span
style="color:windowtext;mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:windowtext;mso-fareast-language:EN-US"><o:p>Â </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="color:windowtext"
lang="EN-US">From:</span></b><span
style="color:windowtext" lang="EN-US"> Healeys
<a class="moz-txt-link-rfc2396E"
href="mailto:healeys-bounces@autox.team.net";><healeys-bounces@autox.team.net></a>
<b>On Behalf Of
</b>Bob Spidell<br>
<b>Sent:</b> 16 June 2019 16:34<br>
<b>To:</b> <a class="moz-txt-link-abbreviated"
href="mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] silicone brake
fluid<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<p>I've used silicone BF in my BJ8 for close to 30 years (and
when I replaced the brake MC, 15-20 years and 80-100K miles
ago, I disregarded the same warning). As somebody mentioned,
your problem is symptomatic of the 'check valve'--aka 'foot
valve--malfunctioning or damaged. I had similar problem with
my brakes on a long road trip; had to pump the pedal a couple
times on every application (for a couple thousand
miles).<o:p></o:p></p>
<p>We put the highly-touted Castrol BF in our 100M after a
thorough restoration--with all-new brake system--and the fluid
jelled when that car sat for a couple years.<o:p></o:p></p>
<p>Side note: Most BFs are calling themselves 'synthetic' these
days. Are they a new formulation, or just jumping on the
bandwagon as, AFAIK, BF has always been synthetic (the glycols
used don't occur in nature)?<o:p></o:p></p>
<p>Bob<o:p></o:p></p>
<p><o:p>Â </o:p></p>
<div>
<p class="MsoNormal">On 6/16/2019 7:44 AM, Team.net
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">I have used silicone in all my british
cars for 25 years with no problems<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Jun 16, 2019, at 09:31, HealeyRick <<a
href="mailto:healeyrik@gmail.com";
moz-do-not-send="true">healeyrik@gmail.com</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal">Apparently, silicone can cause
swelling of the seals in Girling and Lockheed
systems:Â Â <a href="http://www.gomog.com/brakes.html";
moz-do-not-send="true">http://www.gomog.com/brakes.html</a>Â
I have a Howe hydraulic clutch in my Nasty Boy, and
that also came with the advisory not to use silicone
fluid.  <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Rick Neville<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal">On Sun, Jun 16, 2019 at 8:24 AM
Brian Drab <<a href="mailto:bgdrab@redzone.ca";
moz-do-not-send="true">bgdrab@redzone.ca</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC
1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">Last week I completed a driving
tour in our BJ8. It was a great tour and
everything ran well except for one thing. Â 4
or 5 times, when I used the clutch, the clutch
master cylinder bypassed. The rest of the time
it worked well. As I donâ??t want to be caught
without a clutch at a later date I am changing
the clutch master cylinder. I have received a
replacement and am preparing to install
it.<o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">On the box is a quick summary of
the bleeding procedure under a warning â??
â??Using Silicon Brake fluid will void
warrantyâ??. I have used silicon fluid for well
over 10 tears and never experienced any
problems with it and have never seen or heard
of this type of warning before. I have never
heard of any destructive qualities of Silicon
fluid. <o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">My question is â?? does anyone have
any idea what it is about. <o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">For me to change to Dot4 fluid is
quite a big deal as I would be changing out
the clutch as well as the brake system seeing
as they share a common reservoir.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">Iâ??d appreciate any comments on
the warning.<o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">Brian Drab<o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-CA">BJ8<o:p></o:p></span></p>
<p class="MsoNormal"><span
lang="EN-CA"><o:p>Â </o:p></span></p>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
<pre><o:p>Â </o:p></pre>
</blockquote>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/healeys";>http://www.team.net/pipermail/healeys</a>
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href="http://autox.team.net/archive";>http://autox.team.net/archive</a>
<a class="moz-txt-link-abbreviated"
href="mailto:Healeys@autox.team.net";>Healeys@autox.team.net</a>
<a class="moz-txt-link-freetext"
href="http://autox.team.net/mailman/listinfo/healeys";>http://autox.team.net/mailman/listinfo/healeys</a>
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