Hi again,
The way the brake fluid gets into the brake booster is from a leaking master
cylinder. The servos may have nothing wrong with them, but from my experience
with MGC servos, they probably do. The reddish brown color is red from rust,
combined with black particles of dissolved rubber seals. You definitely need a
new master cylinder and you need to flush the brake lines. While you're at it,
you should check the rear brake cylinders because that's where most of the rust
goes. Sorry.
If you need new servos, it's a good call to replace them instead of rebuilding
them. I've never rebuilt servos, but I've heard that it's a nightmare and they
rarely last more than three months. The slick solution is to replace them with
remote brake servos from a Volvo P1800 ES Sports Wagon. These cars are just as
rare as MGC's, but the servos last a lot longer.
Be sure to use DOT4 brake fluid, preferably Catrol, because DOT3 will dissolve
the rubber in the brake system, which might have been your original problem.
Good luck,
Denise
Mike Razor wrote:
>
> Pulled the brake boosters (servos) off the C last night and
> brake fluid came out of the big black vacuum drums, it came
> out of the connection where the vacuum line on each drum goes
> from the manifold to the black drum. I am no brake expert,
> but I don't think there is suppose to be any fluid in that
> drum. Of course the reason I pulled the boosters is that the
> brakes don't work very well.
> The fluid that came out of the vacuum connection at the drum
> did have that nice clear look of brake fluid, it had a reddish
> brown color, some what akin to bourbon in a glass. Except, I
> like to see bourbon in a glass, not my brake systems.
> Any comments or suggestions welcomed.
> I have ordered two new brake boosters (ouch) and they are
> expensive. Even the rebuild kits are high as a cats back.
> THANKS!
> MIKE R
> 52 MGTD
> 59 MGA
> 69 MGC
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