[Healeys] Master cylinder bore

[Stephen Hutchings]

hi again,
Just realized that there are two sizes of callipers in the BJ8 range…this will probably affect the size of your master.
I found the later (bigger) calipers came with a 7/8 master cylinder.

> On Jun 2, 2020, at 4:52 PM, Stephen Hutchings <s.hutchings at rogers.com> wrote:
> 
> Hi Fred,
> 
> I got into these sizes last year because I took my servo out (long story)…my notes say that the 7/8” bore is with servo.
> You can get good quality replacement masters from Pegasus racing- they say they are genuine Girling.
> 
> Good luck,
> 
> Stephen, BJ8
> 
>> On Jun 2, 2020, at 2:33 PM, 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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>