Re: Dot 3, 4, close the door

[farna@xxxxxxx]

Silicone brake fluid might attack OLD seals, but nothing made over the last 20 years or so at least. All repro seals are madefrom modern neoprene, not natural rubber like 1950s and earlier. Silicone CAN hold air as you mentioned though. The typical recommendation is to bleed, let the car sit 24 hours or so for the air to get out of the fluid, then bleed again. Silicone is a bit spngy feeling at first, but otherwise works well. I ran iit for about two years, switched because it was a daily driver and  all my cars don't use silicone. I accidently put standard brake fluid in when topping my car twice -- the second time I put regular fluid in after the alcohol flush since I was about out of the higher priced silicone anyway. 

On June 8, 2005 lynn peterson wrote:

> The use of silicone fluid should be avoided for
> several reasons. Among them, it is virtually
> impossible to completely bleed the system of air, as
> well as the fact that the fluid WILL attack seals. I
> prefer a dot 4 low mositure absorbing fluid,
> especially Castrol LMA. This fluid is especially good
> for vehicles in damp climates or ones that are not
> driven regularly. The reason is your cast iron brake
> parts are pourous, and WILL absorb water to the extent
> that the system will have problems that could lead to
> failure at the most inopertune time.
> 
> regards,
> 
> L. Peterson,
> KustomKemps, Portland, Or.
> 
> --- Armand Eshleman <aje1@xxxxxxxxxxxxxxx> wrote:
> 
> > Dot 3 and 4 brake fluids apparently are compatible.
> > Dot 5 is not compatible
> > with 3 and 4. Dot 5 is synthetic. The Dot 5 cans I
> > looked at said something
> > about not for antilock brakes unless equipped with
> > synthetic from the
> > factory. The curious thing was that the Dot 3 had a
> > higher boiling point
> > that the Dot 4, but if one is not road racing the
> > car or going down hill all
> > the time, it shouldn't matter.
> >
> > The NAPA guy sold me a big can of Dot 4 for my
> > Javelin. It has Low Moisture
> > Absorption written on the container. I know it isn't
> > Castrol LMA but it is a
> > good quality fluid.  The NAPA guy said the stuff
> > that's available at the
> > super variety stores is usually of low quality and
> > will absorb moisture more
> > readily that the Dot 4 bottle I got from him.  I
> > think the Dot 4 is the way
> > to go for AMCs that are not used every day and spend
> > much of their time
> > relaxing in the car-shed, versus flexing their
> > muscle whooping the doors off
> > of the off brands on the street.   Any opinions on
> > this?
> >
> > Thanks,
> >
> > Armand
> >
> >
> >
> >
> >
> >
> >
> 
> 
> 
> 
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