[Healeys] silicone brake fluid

HealeyRick healeyrik at gmail.com
Sun Jun 16 07:31:27 MDT 2019


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 at redzone.ca> wrote:

> Last week I completed a driving tour in our BJ8. It was a great tour and
> everything ran well except for one thing.  4 or 5 times, when I used the
> clutch, the clutch master cylinder bypassed. The rest of the time it worked
> well. As I don’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 –
> “Using Silicon Brake fluid will void warranty”. 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 – 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.
>
> I’d appreciate any comments on the warning.
>
> Brian Drab
>
> BJ8
>
>
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