Paul:
I have run into a similar problem after converting to silicone
brake fluid. Any foreign matter that was in suspension in the original
fluid can come back to haunt you. The contaminated fluid can hide in
the lines if they are not cleaned thoroughly. These contaminants will
rise to the highest point which is the brake master. In the cases I
have seen, the accumulation of water and goo plugs the return port
inside the cylinder. I have seen a new master cylinder corroded beyond
repair in 2 weeks. The symptoms were exactly you are stating. Check
the fluid reservoir and look for signs of contaminated fluid.
Kelvin.
Paul Hunt wrote:
>
> >
> >
> > Ok, I have a braking problem that I havent been able to sort out.
> > I have an idea of what *might* be wrong, but I wanted to bounce the
> > problem past the list before I run off any buy new parts.
> >
> > Here are the facts:
> >
> > 73 MGB, dual circuit brake system, rebuilt calipers, rebuilt master
> > cylinder (both rebuilt by me), new wheel cylinders, new brake lines,
> > hoses, pads and shoes. All components were replaced or rebuilt.
> > I am using DOT5 brake fluid (silicone).
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