The water gets in because of condensation (small bit by small bit) in
the reservoir over the years. There will always be temperature changes
and the relative humidity in the reservoir is the same as in the ambient
air. In very hot and humid conditions there is a lot of water vapour in
the air so when the temp drops condensation in the reservoir is very
possible.
Kees Oudesluijs
Op 18-3-2021 om 04:25 schreef Charley Braum via Healeys:
> I changed over to Silicone Fluid many years ago whilst ignoring
> the 'degraded performance' warnings (as in - it will fade/fail
> in "spirited driving" situations) and my realised expectation of
> dodging (increasingly expensive, then and now) repairs to painted
> surfaces due to spilled fluid damage.
>
> I cannot attribute any issue with my brakes since to the fluid change.
>
> That said, I set up an experiment (years ago). I put enough Silicone
> Fluid in a glass baby bottle to fill it to half-way. I put the bottle,
> without
> a cap (open to the air) on a shelf in my unheated garage.
>
> After six months (and two season changes) I asked a business
> acquaintance to analyze my test sample, especially with regards
> to H2O content. His assessment was H2O was less than 1%.
>
> With a closed hydraulic system (our Healeys), once the system is
> charged and the bleeders are closed, the only interaction with
> the atmosphere is through the reservoir cap vent, I think.
>
> How does all this water get in the system?
>
> Best to all,
>
> Charley
>
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