Is the reservoir tight fit?
Between the reservoir and the MC cyl are two O-rings.
If the leaking fluid comes from under the reservoir, it maybe, that the
rings are missing or faulty.
Better check this out.
I assume it is regarding the dual tandem US spec. MC, which was used from
1969 till some 1974.
Cheers,
Hans
P.S. Merry Christmas list!
----- Original Message -----
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
To: "Craig Straub" <craigstraub@sbcglobal.net>; <mgs@autox.team.net>
Sent: Wednesday, December 23, 2009 10:01 AM
Subject: Re: [Mgs] Brake Master Cylinder
> Leaks from where? The banjo union? If so reseal it. The other end of
> the cylinder where the push-rod goes in? If so try pumping the pedal up
> and down as fast as you can for as long as you can, which should soften up
> the seals, if the weather is cold try warming up the cylinder first with a
> hair drier or fan heater. New cylinders and long layups with no fluid can
> allow seals to dry out, harden and leak back when refilled. A pal putting
> his car back on the road after a couple of years had the main seal weeping
> (gears intermittently graunching and baulking) until he tried this, which
> very fortuitously was a tip published in that months issue of the MGOC
> magazine.
>
> If it's leaking from anywhere else then it may be no good, although if
> it's from between the reservoir and the cylinder you *may* be able to
> solder it. I've had the reservoir corroded through in the past, but I
> hardly think that is the cause on a new one.
>
> PaulH.
>
> ----- Original Message -----
>>I just put on a brand new brake master cylinder on my 1973 MGB. I have
>>had it on the shelf for the last two years.
>> The problem I have is that the master cylinder leaks.
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