TeriAnn (et al) - if one has replaced all rubber and brake lines is there an
advantage to changing to DOT5 vs. reverting to DOT4.
Thanks
Carl
-----Original Message-----
From: TeriAnn Wakeman [mailto:twakeman@cruzers.com]
Sent: Monday, August 21, 2000 1:40 PM
To: Pat; TRlist
Subject: Re: Brake fluid DOT4 or 5 ?
>I don't know much about brake fluid. I read in a web page that the person
>used DOT5 rather than DOT4.
>
>Am I correct in that DOT5 does not peel off the paint ?
Correct
>
>They also said that to convert to DOT5 they had to use all new "Rubber".
>What does this mean, all new rebuild kits that have rubber ?
This means replace ALL rubber that comes in contact with the brake fluid.
I had a lengthy conversation once with the person who wrote the test
report for a fesibility test on using silicone hydraulic fluid for
automotive brakes. Brake fluids react with the rubber changing it's
characteristics. Traditional and silicone brake fluids react with rubber
in different ways. Rubber seals that have been immersed in traditional
brake fluids will almost always leak soon after being introduced to
silicone fluid.
So yes you should clean out the system (flush it with alchohol ideally),
clean then rebuild all cylinders with new rubber and replace the brake
flex lines when converting from traditional brake fluid to silicone brake
fluid.
TeriAnn
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