RE: DOT 5 (Silicone) Brake Fluid

[Aleksander Mierzwa <alex@matrix.com.pl>]

I've heard that even the slightest amount of DOT 4 left in the system
will cause serious damage if you switch to DOT 5. It is necessary to
actually rebuild whole system (renew MC, dissasemble and clean the
calipers, renew or at least pressure flush all brake lines etc.). 

Aleksander Mierzwa
Warsaw, Poland
mailto:alex@matrix.com.pl
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)

> -----Original Message-----
> From:	Douglas Hurst Quebbeman [SMTP:dougq@iglou.com]
> Sent:	Monday, January 26, 1998 8:04 AM
> To:	quattro@coimbra.ans.net
> Subject:	DOT 5 (Silicone) Brake Fluid
> 
> But the problem seems to center around it mixing with normal
> (DOT 4) brake fluid. Apprantly, some reactive by-product
> attacks the seals in the system.
> 
> But it would seem that if you flush every drop of DOT 4 out of
> the system, you'd have no problems.
> 
> DOT 5 fluid is supposed to be superior, including but limited to the 
> fact that it is not hygroscopic.
> 
> Does anyone here have any experience at all with DOT 5 fluid, and
> has anyone ever succeeded in using it in an Audi?
> 
> tia,
> doug
> 
> 
> --
> -Douglas Hurst Quebbeman (dougq@iglou.com)            [Call me "Doug"]
>     QuattroClub USA# 4536              Audi International # 100024
>        74 100LS Auto, 77 100LS Auto, 84 Coupe GT, 86 5Kcstq   
> "The large print giveth, and the small print taketh away."  -Tom Waits