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Re: Brake master cylinder rebuild or buy new?

To: MG List <>
Subject: Re: Brake master cylinder rebuild or buy new?
From: Max Heim <>
Date: Thu, 28 Feb 2002 10:11:04 -0800
If it's really the original MC the inside is doubtless a gooey mess. For the
amount of trouble involved and considering the possibility of overhoning
creating a poor seal, I would just get a new one. As I recall it is
particularly difficult to disassemble this MC -- there is a plastic
piston-thingie (technical term) that tends to get stuck deep in the bore,
and often has to be drilled or chiseled out.

on 2/28/02 9:25 AM, Tim Economu at wrote:

> Hello wise friends.....
> what do you think? My 1969 probably original brake master cyl has decided to
> go "pedal to the medal" and lose braking power. The pedal will go to the
> floor in about 5-6 seconds after a hard push. Fluid was changed recently,
> was/is Castrol GMA. No fluid is being lost.
> Is current wisdom to repair or replace with new? I intend to drive the car
> for the next 30 years so I do not want  a short term fix. Of course there is
> a chance the cylinder has already been rebuilt. Is it possible to get a unit
> to seal after a couple of rehones? Do you think I should repair, or replace?
> Is either one a very difficult job, and besides the obvious task of bleeding
> which has been well covered, are there any gotchas?
> Kind regards,
> Tim Economu
> 1969 MGB/GT will slowly fading brakes!!


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

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