Re: [Chrysler300] Brake Fluid Question

[Tony Rinaldi <awrdoc@xxxxxxxxx>]

Perhaps the brake light switch in your ³B² is an original (OEM) and not an
after market switch that may have a diaphragm made of a substance that is
susceptible to shrinkage when in long term contact with silicone fluid.

There has been a problem with seals in some modern disc brake calipers where
the seals shrink with silicone fluid. Replacement seals were immersed in
silicone fluid in a dish. After a month, the seals shrunk to half their
size. The manufacturer had to switch seal manufacturers and material specs
to eliminate the problem.

All brake light switches are NOT created equal and the original NOS switches
(if you can still get one) most probably would have the flexible diaphragm
dried out after 40 years.

The advantages of silicone fluid is that it is not hydroscopic and is a good
choice in autos that are no used daily to eliminate water build up in the
hydraulic brake lines. Switching to a mechanical switch is no big deal as a
trade off for the advantages of using silicone.

Tony
300-F
Conv¹t



From: Roger Schaaf <obiwan10@xxxxxxxxxxx>
Date: Mon, 21 Feb 2005 09:12:22 -0800
To: <chrysler300@xxxxxxxxxxxxxxx>, <lettercars@xxxxxxx>
Subject: Re: [Chrysler300] Brake Fluid Question

Running silicon fluid for 16 years in my B.  No problem with brake light
switch.  Any wiring or grounding problems on the Saragota?  Perhaps bad
connection at point where light bulb "tits" contact socket?

Roger Schaaf
----- Original Message -----
From: <lettercars@xxxxxxx>
To: <chrysler300@xxxxxxxxxxxxxxx>
Sent: Monday, February 21, 2005 6:50 AM
Subject: [Chrysler300] Brake Fluid Question


>
> Hi All:
> I am about ready to put brake fluid in the 300F.  Has anyone had recent
> experience with silicon fluid in a car with the hydraulic brake light
> switch?  I
> used it in my '57 Saratoga in the 1980's, and went thru a couple of
> switches.
> The brake lights just gradually got dimmer.
> Have used it in the 300H for at least 10 years, but of course it has the
> mechanical switch.
> Thanks for your input.  300ly, Gil Cunningham
>
>
> [Non-text portions of this message have been removed]
>
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