Richard, I think the reason for the uncertainty regarding the seals is based
upon the vintage of the seals. If they are relatively new they may be made from
a compound compatible with DOT5. Older/original rubber may not be. And since
we're talking brakes, wouldn't a proper rebuild be prudent? I mean, the reason
to switch to DOT5 is high temp performance and freedom from DOT4's hydroscopic
nature. The former says you should rebuild anyway unless your brakes are new.
The later is just a matter of good brake maintenance. Either fluid should be
flushed annually.
Just my unsolicited two cents. :-)
Rick
------Original Message------
From: Richard Gosling
Sender: mgs-bounces@autox.team.net
To: Steve Gorr
Cc: Mgs@autox.team.net
Sent: Jan 11, 2009 3:08 AM
Subject: Re: [Mgs] 78 MGB Brake fluid change
Yes, you should flush the system with denatured alcohol / methylated spirits
before introducing the silicone fluid.
I have heard tell that all seals should be replaced when you switch to
silicone, but others have apparently made the switch without replacing seals
and it has been OK. But this is hearsay, so don't take my word for it!!
Richard & Sammy ('73 Black Tulip BGT)
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