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

[Brian Kemp]

I'm told it is how the parking brake adjusts itself when the pads get 
worn.  The parking brake lever pulls a cable which actuates the rear 
brake calipers.  Discovered the special tool after battling the rear 
brakes on my wife's Jetta.  I borrowed the special tool from the local 
O'Reilly or Pep Boys.

If I remember correctly, I had to use the brakes a couple times before 
the parking brake worked again.

Brian

On 9/13/2018 5:05 AM, 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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