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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 17:40:54 -0800
Boosters don't improve braking performance, they reduce pedal effort --
frequently to the point of eliminating sensitivity. I would see no benefit
in this mod whatsoever, since the unassisted pedal effort is certainly
within the capabilities of any healthy adult.

(how's that for an unequivocal response?)

on 2/28/02 2:38 PM, Andrew B. Lundgren at wrote:

> I bought a new one when it came time...
> On a side note, I have read that some people have replaced their early brake
> systems with the huge booster system that was used in the late models.
> Is there any benefit to doing that?  My brakes will lock up now if I mash
> them, what does the booster do to improve it?
> On Thu, 28 Feb 2002, Tim Economu 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?


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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