[Healeys] BJ8 Rear Brake

Bob Spidell bspidell at comcast.net
Wed Jul 7 10:12:04 MDT 2021

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.


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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