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I converted to DOT5 in both my Spits. I just purged the system both times and
the only thing I had to rebuild is one caliper which began to seep a little.
It has been 19 years on one car and a year on the second.
Joe
> On April 16, 2020 at 6:33 AM "Reihing, Randall S."
> <Randall.Reihing@utoledo.edu> wrote:
>
> Hello All,
>
> Thank you Randall for this valuable and important clarification.
>
> I am in the process of replacing just the rotors, calipers and two of the
> flexible brake lines to teh calipers. Can I drain out the existing DOT 4 and
> switch to DOT 5?
>
> Or do I need to completely flush the entire system and replace all the
> wheel cylinder, master cylinder, and clutch master and slave cylinder seals
> when converting from DOT 4 to DOT 5?
>
> Randall Reihing
> 1959 TR3A
>
>
>
> ---------------------------------------------
> From: Triumphs <triumphs-bounces@autox.team.net> on behalf of Randall
> <TR3driver@ca.rr.com>
> Sent: Thursday, April 16, 2020 1:55 AM
> To: 'Sujit Roy' <triumphstag@gmail.com>; 'Triumphs'
> <triumphs@autox.team.net>
> Subject: [EXTERNAL] Re: [TR] Brake fluids again
>
> All brake fluid is "synthetic" whether it says so on the can or not. It's
> not made from petroleum distillate.
>
> Yes, DOT 4 will absorb water, eat paint and so on. Castrol claims theirs
> absorbs slower than others (the "LMA"), but it still absorbs.
>
> DOT 5 is a completely different chemistry, a silicone oil rather than the
> glycols used in DOT 3, 4 and 5.1. It does not absorb water, eat paint,
> become corrosive over time, etc.
>
> Look for the word "silicone" on the label. DOT 5 must have it, the others
> cannot have it.
>
> The word "synthetic" is totally meaningless for brake fluid.
>
> FWIW, both of my Stags have DOT 5 in them.
>
> -- Randall
>
> > I'm rebuild brakes and clutch with new seal on a Stag. I have
> > this brake fluid
> >
> >
> https://urldefense.com/v3/__https://www.bpnorthwest.com/fluid-brake-clutch-castrol-lma-12-__;!!LoBwcKfm!xQYsagVOFhpKFqJG0WkgFruEWat-p_lygSpuLlqbZWK-6UD6t-0Z-ZXm3e-xQY8OfVfao68$
>
> https://urldefense.com/v3/__https://www.bpnorthwest.com/fluid-brake-clutch-castrol-lma-12-__;!!LoBwcKfm!xQYsagVOFhpKFqJG0WkgFruEWat-p_lygSpuLlqbZWK-6UD6t-0Z-ZXm3e-xQY8OfVfao68$
> > oz.html
> >
> > which says DOT 4 synthetic (Castrol) . If it is synthetic,
> > will it absorb water?
> >
> > I'm a bit confused as people are saying get DOT5. synthetic.
> > Is the buzz word synthetic?
>
> ** triumphs@autox.team.net **
>
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<!DOCTYPE html>
<html><head>
<meta charset=3D"UTF-8">
</head><body><p>I converted to DOT5 in both my Spits.  I just purged t=
he system both times and the only thing I had to rebuild is one caliper whi=
ch began to seep a little.  It has been 19 years on one car and a year=
on the second.</p><p><br></p><p>Joe</p><blockquote type=3D"cite">On April =
16, 2020 at 6:33 AM "Reihing, Randall S." <Randall.Reihing@utol=
edo.edu> wrote: <br> <br><div style=3D"font-family: Calibri, Arial, Hel=
vetica, sans-serif; font-size: 12pt; color: #000000;">Hello All,</div><div =
style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12p=
t; color: #000000;"><br></div><div style=3D"font-family: Calibri, Arial, He=
lvetica, sans-serif; font-size: 12pt; color: #000000;">Thank you Randall fo=
r this valuable and important clarification. </div><div style=3D"font-=
family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: #000=
000;"><br></div><div style=3D"font-family: Calibri, Arial, Helvetica, sans-=
serif; font-size: 12pt; color: #000000;">I am in the process of replacing j=
ust the rotors, calipers and two of the flexible brake lines to teh caliper=
s. Can I drain out the existing DOT 4 and switch to DOT 5? </div><div =
style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12p=
t; color: #000000;"><br></div><div style=3D"font-family: Calibri, Arial, He=
lvetica, sans-serif; font-size: 12pt; color: #000000;">Or do I need to comp=
letely flush the entire system and replace all the wheel cylinder, master c=
ylinder, and clutch master and slave cylinder seals when converting from DO=
T 4 to DOT 5?  </div><div style=3D"font-family: Calibri, Arial, Helvet=
ica, sans-serif; font-size: 12pt; color: #000000;"><br></div><div style=3D"=
font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color:=
#000000;">Randall Reihing</div><div style=3D"font-family: Calibri, Arial, =
Helvetica, sans-serif; font-size: 12pt; color: #000000;">1959 TR3A</div><di=
v style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 1=
2pt; color: #000000;"><br></div> <br><hr style=3D"display: inline-bloc=
k; width: 98%;"><div id=3D"ox-2257860b98-divRplyFwdMsg" dir=3D"ltr"><span s=
tyle=3D"font-size: 11pt; color: #000000; font-family: Calibri, sans-serif;"=
><strong>From:</strong> Triumphs <triumphs-bounces@autox.team.net> =
on behalf of Randall <TR3driver@ca.rr.com><br> <strong>Sent:</stron=
g> Thursday, April 16, 2020 1:55 AM<br> <strong>To:</strong> 'Sujit Roy=
' <triumphstag@gmail.com>; 'Triumphs' <triumphs@aut=
ox.team.net><br> <strong>Subject:</strong> [EXTERNAL] Re: [TR] Brake fl=
uids again</span><div> </div></div><div class=3D"ox-2257860b98-BodyFra=
gment"><div class=3D"ox-2257860b98-PlainText">All brake fluid is "synth=
etic" whether it says so on the can or not.  It's <br> not mad=
e from petroleum distillate. <br> <br> Yes, DOT 4 will absorb water, eat pa=
int and so on.  Castrol claims theirs <br> absorbs slower than others =
(the "LMA"), but it still absorbs. <br> <br> DOT 5 is a completely =
different chemistry, a silicone oil rather than the <br> glycols used in DO=
T 3, 4 and 5.1.  It does not absorb water, eat paint, <br> become corr=
osive over time, etc.  <br> <br> Look for the word "silicone" =
on the label.  DOT 5 must have it, the others <br> cannot have it. <br=
> <br> The word "synthetic" is totally meaningless for brake fluid.=
<br> <br> FWIW, both of my Stags have DOT 5 in them. <br> <br> -- Randall =
<br> <br> > I'm rebuild brakes and clutch with new seal on a Stag. =
I have <br> >  this brake fluid <br> > <br> > <a href=3D"h=
ttps://urldefense.com/v3/__https://www.bpnorthwest.com/fluid-brake-clutch-c=
astrol-lma-12-__;!!LoBwcKfm!xQYsagVOFhpKFqJG0WkgFruEWat-p_lygSpuLlqbZWK-6UD=
6t-0Z-ZXm3e-xQY8OfVfao68$"> https://urldefense.com/v3/__https://www.bpnorth=
west.com/fluid-brake-clutch-castrol-lma-12-__;!!LoBwcKfm!xQYsagVOFhpKFqJG0W=
kgFruEWat-p_lygSpuLlqbZWK-6UD6t-0Z-ZXm3e-xQY8OfVfao68$</a> <br> > oz.ht=
ml  <br> > <br> > which says DOT 4 synthetic  (Castrol) .=
If it is synthetic, <br> > will it absorb water? <br> > <br> >=
I'm a bit confused as people are saying get DOT5. synthetic. <br> >=
; Is the buzz word synthetic? <br> <br> ** triumphs@autox.team.net ** <br> =
<br> Donate: <a href=3D"https://urldefense.com/v3/__http://www.team.net/don=
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