[Shop-talk] Why in the world do we need 'spinning' brake pistons?

[Larry Spector]

It has to do with the parking brake. There's a mechanism in the caliper
that pushes on the piston when you activate the parking brake. The spinning
piston is the self-adjuster to deal with brake pad wear so the system works
with worn pads.

I don't think it's all that new- my '91 MR2 had this, and it was likely
around for a while before then.

-Larry

On Thu, Sep 13, 2018 at 3:54 PM <eric at megageek.com> wrote:

> Can someone please let me know what the advantage of the new 'spin to
> compress' brake pistons are?
>
> Seriously, were cars flying off the road with no brakes and I didn't
> notice it?
>
> This new system requires more tools* (and they didn't even standardize the
> pattern), more effort, most of the time destroys the boot, and requires you
> to line up a pin with the de-tent so you can put the caliper on.
>
> So what am I missing?  Why are these better?  I would image they are more
> complicated on the inside as well.  Also seems that they require more
> machining/parts to make.
>
>
> *=I don't mind buying more tools, in fact I already bought the tool and
> I'm looking at an upgraded version of it.
>
>
> Sent from my Commodore 64 on a 2400 Baud Modem.
> Tech Viper
> "Be as beneficent as the sun or the sea, but if your rights as a rational
> being are trenched on, die on the first inch of your territory." Ralph
> Waldo Emerson _______________________________________________
>
>
>
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