Eric:
Sounds like you might have the seal in the master cylinder in backwards.
Are you quite sure that all other nipples are sealed tight? You could be
sucking in some air from a badly sealed or crossthreaded nipple on another
of the wheels.
The other thing might be that you have one of those reservoirs (like mine)
that has a very small opening to the rear system (dual system) and you're
not actually filling the right one up? Don't scoff at me- I made this
error, and couldn't understand where the air was coming from.
Congrats on your wedding, and good luck with the brakes!
> My father and I have just finished overhauling my '77 Spitfire's brake
> system: new rear cylinders, new seals in front cylinders, new front pads,
> new seals in master cylinder, new hoses, new front-to-back brake pipes.
> Now the system won't bleed properly and the pedal remains soft. We keep
> getting tiny bubbles and foam, even after we've pumped three litres of fluid
> through the system. We primed and bench-bled the master cylinder and bleed
> by the book: nipple open - pump in - nipple closed - pump out. I can see
> there's foam coming out as I use a length of silicone tube in a jam jar.
>
> Additional info:
>
> * standard double brake system
> * small brake reservoir
> * no visible/noticeable leaks
> * handbrake off while bleeding
> * DOT 3 brake fluid
>
--
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David Brock dmbrock@julian.uwo.ca
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