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There are a number of master cylinders on the market. TRW/Gurling are the O=
EM choice. They cost more but usually the quality is better. There are afte=
rmarket master cylinders usually made in China or India. These can work but=
out of the box failures have been reported. These are usually lower cost. =
But there is a risk associated with them. I think (no evidence) that If you=
put one in and it works then it is no worse than any other. =C2=A0 Moss se=
lls those gold grade cylinders. These are at a premium price and are suppos=
ed to be higher quality. However, when the product was new they had some ou=
t of the box failures. I have not heard of anymore OOB failures with the go=
ld grade. Moss is a large company and if there was an issue, I am sure they=
would have corrected it.=C2=A0
The difficulty in all of this is I am not aware of the circumstances of the=
se failures or even if they were real failures due to a quality issue rathe=
r than mis-use or poor installation by the owner.=C2=A0
It is important to Bench Bleed these assemblies. See YouTube or your servic=
e manual or the Haynes book (IMHO the Chilton books are worthless - sorry).=
Bench bleeding can be done in the car. See www.bullfire.net
Then there is the fluid. DOT 3 and DOT 4 cause the elastomers to swell. Eve=
ntually the elastomers will fail but frequent use of the car seems to exten=
d the life of the seals. I think changing out the fluid every 2 years or so=
is a good thing / helps avoid water in your brake lines. DOT 5 is controve=
rsial because the manufacturers include box inserts that say if you use DOT=
5 it voids their warranty. They don=E2=80=99t say that DOT 5 is incompatib=
le. They just won=E2=80=99t support it. I will use DOT 5 because my car is =
newly restored and painted and I don=E2=80=99t want paint damage if the cyl=
inder leaks. YMMV.=C2=A0
Good luck and I hope this was useful.=C2=A0
John Cyg70 DamsonCC52927LO=C2=A0
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<html><head></head><body><div class=3D"yahoo-style-wrap" style=3D"font-fami=
ly:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><span styl=
e=3D"font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;=
font-size: 16px;">There are a number of master cylinders on the market. TR=
W/Gurling are the OEM choice. They cost more but usually the quality is bet=
ter. There are aftermarket master cylinders usually made in China or India.=
These can work but out of the box failures have been reported. These are u=
sually lower cost. But there is a risk associated with them. I think (no ev=
idence) that If you put one in and it works then it is no worse than any ot=
her. Moss sells those gold grade cylinders. These are at a premium p=
rice and are supposed to be higher quality. However, when the product was n=
ew they had some out of the box failures. I have not heard of anymore OOB f=
ailures with the gold grade. Moss is a large company and if there was an is=
sue, I am sure they would have corrected it. </span><br><div><span sty=
le=3D"font-family: "Helvetica Neue", Helvetica, Arial, sans-serif=
; font-size: 16px;"><br></span></div><div><span style=3D"font-family: "=
;Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;">The =
difficulty in all of this is I am not aware of the circumstances of these f=
ailures or even if they were real failures due to a quality issue rather th=
an mis-use or poor installation by the owner. </span></div><div><span =
style=3D"font-family: "Helvetica Neue", Helvetica, Arial, sans-se=
rif; font-size: 16px;"><br></span></div><div><span style=3D"font-family: &q=
uot;Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;">I=
t is important to Bench Bleed these assemblies. See YouTube or your service=
manual or the Haynes book (IMHO the Chilton books are worthless - sorry). =
Bench bleeding can be done in the car. See www.bullfire.net</span></div><di=
v><span style=3D"font-family: "Helvetica Neue", Helvetica, Arial,=
sans-serif; font-size: 16px;"><br></span></div><div><span style=3D"font-fa=
mily: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: =
16px;">Then there is the fluid. DOT 3 and DOT 4 cause the elastomers to swe=
ll. Eventually the elastomers will fail but frequent use of the car seems t=
o extend the life of the seals. I think changing out the fluid every 2 year=
s or so is a good thing / helps avoid water in your brake lines. DOT 5 is c=
ontroversial because the manufacturers include box inserts that say if you =
use DOT 5 it voids their warranty. They don=E2=80=99t say that DOT 5 is inc=
ompatible. They just won=E2=80=99t support it. I will use DOT 5 because my =
car is newly restored and painted and I don=E2=80=99t want paint damage if =
the cylinder leaks. YMMV. </span></div><div><span style=3D"font-family=
: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px=
;"><br></span></div><div><span style=3D"font-family: "Helvetica Neue&q=
uot;, Helvetica, Arial, sans-serif; font-size: 16px;">Good luck and I hope =
this was useful. </span></div><div><span style=3D"font-family: "H=
elvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;"><br></=
span></div><div><span style=3D"font-family: "Helvetica Neue", Hel=
vetica, Arial, sans-serif; font-size: 16px;">John Cyg</span></div><div><spa=
n style=3D"font-family: "Helvetica Neue", Helvetica, Arial, sans-=
serif; font-size: 16px;">70 Damson</span></div><div><span style=3D"font-fam=
ily: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 1=
6px;">CC52927LO </span></div><div><span style=3D"font-family: "He=
lvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;"><br></s=
pan></div><div><span style=3D"font-family: "Helvetica Neue", Helv=
etica, Arial, sans-serif; font-size: 16px;"><br></span></div></div></body><=
/html>
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