[Healeys] BJ8 Rear Brake

David P frogeye at porterscustom.com
Wed Jul 7 10:34:30 MDT 2021

Aside from the filing to fit, those cylinders MUST slide in the opening 
in order for the shoes to center in the drum. Lately, when both retainer 
clips are inserted the cylinder is immobile, so the side grooves must be 
filed as well.. Best to rebuild the originals if and when possible.. 
NAPA, et al have the cups and the other rubber bits from the Moss, 
etc..  daveP

On 7/7/2021 10:12 AM, Bob Spidell wrote:
> re: '... there still being some residual brake fluid on the drum (even 
> though I thought I had cleaned it all off) ...'
> Can't be done. I tried once, by cleaning--with brake cleaner--sanding 
> the 'wet' off and repeat repeat repeat. I thought I had some cleaned, 
> but after sitting overnight brake fluid would ooze out, no matter how 
> many times I tried to clean them. Maybe, if it's a light 'dusting' of 
> fluid, and you get to it immediately you can have some success, but 
> who wants to take any chances with brakes?
> FWIW, I've 'voided the warranty' several times using silicone BF with 
> no issues (I have had problems with DoT 3, though). I don't recall the 
> 'Classic Gold' cylinders I got from Moss having that warning on the 
> box. I was grateful to pay a reasonable price for front cylinders for 
> a BN2; years ago they were something like $70 per for F/R. I never 
> figured out why, just for the front rights, but we got one that was 
> obviously a return (slightly) cleaned-up and put back on the shelf. 
> Moss, among others--looking at you, RockAuto--apparently put returns 
> back on the shelf without inspecting them.
> bs
> On 7/7/2021 8:46 AM, Healey wrote:
>> Hi Michael - to elaborate - after a few miles of driving, the rear 
>> brake in question was getting so hot, it started to smoke :-(
>> In retrospect, that was probably exacerbated by there still being 
>> some residual brake fluid on the drum (even though I thought I had 
>> cleaned it all off) from the previous / original wheel cylinder that 
>> went bad.
>> However, the underlying problem of the cylinder not retracting is 
>> confirmed with the drum off.
>> Thanks,
>> Neil
>> On Tue, Jul 6, 2021 at 8:58 AM Michael Salter 
>> <michaelsalter at gmail.com <mailto:michaelsalter at gmail.com>> wrote:
>>     Perhaps you could better describe "things were not right".
>>     If the brake was not overly hot there may be no problem.
>>     When correctly adjusted the wheel cylinder only operates in the
>>     first couple of mm of its stroke, the rest of the bore serves
>>     only as a guide for the piston.
>>     M
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