[Healeys] Master cylinder bore

[Michael Salter]

Don't be too hasty to condem the master cylinder on a BJ8. The servo and/or
rear cylinders are serious contenders also.
Diagnose *before* repair.
The master cyl was originally 7/8" bore as I recall.
M

On Tue., Jun. 2, 2020, 2:34 p.m. Fred Wescoe, <fredwescoe at gmail.com> wrote:

> Listers,
>
> I took the car out for a nice long drive this morning (100+ miles round
> trip).  About 15 miles from home, on the way back, the brake pedal slowly
> went to the floor.  A quick pump and the brakes stopped the car without a
> problem.
>
> So now I need to repair/replace the master cylinder.  What size cylinder
> bore do I have?   The car is a 1964 BJ8, MK III with the brake booster.
> The chassis number is 29009.  Do I have a 78" or a 3/4" bore.  My manual
> does not indicate the bore size.
>
> Should I repair or replace it?  I am inclined to repair if there are
> quality parts available.  It seems that a quality master cylinder
> replacement  is not readily available.
>
> Thanks for some sound advice,
>
> Fred Wescoe
>
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