[Mgs] Clutch Master Cylinder Barfing

[Councill, David]

The master cylinder can leak, as described. And I have had it happen on
my 67 BGT. But a rebuild should last for many years, even decades. So
I'd say it was overhoned like Max says or alternately, it may not have
been honed at all during the prior rebuild and a rough area or rust spot
is causing premature seal failure.

David Councill
64 B
67 BGT
72 B

-----Original Message-----
From: mgs-bounces at autox.team.net [mailto:mgs-bounces at autox.team.net] On
Behalf Of Max Heim
Sent: Thursday, February 25, 2010 4:12 PM
To: MG List
Subject: Re: [Mgs] Clutch Master Cylinder Barfing

Folowing up on the other clutch cylinder thread...

Maybe somebody rebuilt the clutch MC, and "overhoned" it. In extremely
cold weather the metal shrinks and it loses the seal. Just a theory. Or
the seals could just be old and hard -- same effect.

I would agree about the TO bearing.

--

Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires


on 2/25/10 2:37 PM, Mike Eldred at redscirocco at hotmail.com wrote:

> This is in my new-to-me '73 Midget.  At some point over the colder
> months, the clutch master cylinder leaked, spilling onto the driver's
> side footwell.  When I bought the car, DPO told me this had happened
> to him last winter, too, so I was kind of expecting it.  Any ideas as
> to what's going on?  I'm already planning to install a new MC and
> slave anyway, but I can't figure out what it is about cold weather (I
> mean cold like ~zero degrees f.) that would make it leak and pour out.
>
>
>
> A second, perhaps related, clutch problem I'd appreciate any insight
> on: when you put any presssure on the clutch, engine running, you get
> a whining squealing sound - release the clutch and it's gone.  Doesn't

> matter if it's in gear or neutral.  My diagnosis is that the throwout
> bearing is shot, and I plan to replace the bearing, pressure plate and

> clutch disc this spring.  Any other thoughts?
>
>
>
> Cheers,
>
> -Mike Eldred
>
> Wilmington, VT
>
> '54 MG TF
>
> '73 Midget