<VV> Brake Master Cylinder...

[Tony Underwood]

At 02:10 hours 08/25/2006, Secular wrote:

>   Hi:
>
>   What are the signs of a bad master cylinder? I was helping a 
> friend who has a 65 Convertible. The brake master cylinder was 
> completely empty. The car has been sitting in his garage for a 
> couple of years. We filled it up while pumping the brake pedal.
>
>   The pedal came up - but after 5 seconds it moves all the way 
> down. There are no signs of leakage from wheel cylinders and the 
> master cylinder is retaining all the brake fluid !
>
>   Please help !
>
>
>   Tony
>  ____________________________





Crack or groove etc, (or simply hardened with age) in the neoprene 
(or whatever it's made of) piston cup in the master 
cylinder.   You're simply churning fluid.



tony..