Date: Thu, 19 Mar 1998 15:53:25 GMT From: joenopsamoresource.com (Joe Way) Subject: Re: silicon brake fluid
On 18 Mar 1998 18:02:56 GMT, "Porcupine" <porcupinenopsametmail.com> wrote: >I work for a manufacturer of Silicone Brake Fluid and your both >right/wrong... its a one way story.... change to Silicone fluid by all >means but don't go back to Dot3/4 or there will be trouble! > >And always check seal compatibilty of course.... and the silicone is good >for life. > I suspect this is a troll--but just in case it isn't.... If you work for a mfr of silicone fluid, perhaps you could tell us about the compatibility of your fluid with EPDM and SBR seals, and neoprene lines. And what kind of trouble will be encountered in returning to glycol fluid? One of the few constants I've encountered in my search for information on silicone is that a thorough flush & refill is sufficient when changing from silicone back to glycol. You state flatly that silicone is good for life. You're posting to old-car newsgroups, among others--are you aware that most of the old-car readers' vehicles have vented master cylinder caps? Normal transpiration due to heat/cold cycles *WILL* cause moisture from condensation to accumulate in the fluid. You must also be aware that the water that does get into silicone aggregates into droplets that have the potential to do serious rust damage in systems that don't get used much, depending on where they settle. Even systems with sealed caps are subject to accumulation of moisture from migration through hoses and from pumping action at cylinder/caliper seals. These facts would seem to indicate that periodic changing is essential for system life even with silicone fluid. Please comment further, with references from your employer and links to on-line information if available. If you're not authorized by your employer to speak for them on-line, please refer these questions to someone who is. Please address the questions of compressibility, electrical contacts in brake-light switches, the effect of altitude changes on aerated fluid and the effect of combustion byproducts on engines (for those whose vacuum boosters have direct paths from pressurized fluid to vacuum). We'd *really* like more information. Joe ==brake cylinders sleeved with brass== ==One-Wire conversions and rebuild kits for GM alternators 1963-85== ==Quincy, CA==
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