[s-cars] Rear caliper piston: how to move it into the caliper

[qshipq at aol.com]

 That square tool works fine if you loosen the bleeder screw first...  Which you should do anyhow, no matter which tool you use.  I own several piston retraction tools, including that metalnerd one.  I think it's the worst because the threads on the backing plate jam don't match the threads of the piston post of any Audi I've used it on.  Compare that tool to the 3272 from audi with the correct pitch, you understand what I mean.

I machined my own piston retraction tools from a crapsman sockets and use the low torque setting on my air gun with the bleeder screw open.  Less than 10 seconds and the piston is retracted.

Pop the bleeder screw, and the 5.99 tool from HF will work just fine IMO.  

HTH

Scott J



-----Original Message-----
From: John Cody Forbes <cody at 5000tq.com>
To: Konstantine Bogach <kbogach at comcast.net>
Cc: s-car-list at audifans.com <s-car-list at audifans.com>
Sent: Wed, Sep 22, 2010 11:09 pm
Subject: Re: [s-cars] Rear caliper piston: how to move it into the caliper


You must both rotate and apply axial force to push the piston in, and no, you 
can't apply enough force by hand. Sometimes, if in a pinch, I find that it works 
to rotate a few runs then squeeze with a c-clamp are large pliers, then rotate 
again and squeeze etc. This may get the job done but it takes a very long time. 
Really you want/need the tool that pushes and turns for you.

-Cody (mobile)

On Sep 22, 2010, at 11:57 PM, Konstantine Bogach <kbogach at comcast.net> wrote:

>  I have this "cube" tool.  I rotated the piston clockwise and it does 
> not go in.   But counter clockwise rotation quickly move the piston 
> outward.   Can it be that it does not go in because I can not apply 
> enough pressure on the piston with my bare hands?    I am afraid 
> something is off inside because the piston had to extend a lot,  the pad 
> wore out to the metal backing.
> 
> Konstantine
> 
> On 09/22/2010 09:19 PM, Ian Duff wrote:
>> They screw back in. There are a number of ways to do so, the two seemingly 
most common are:
>> http://www.harborfreight.com/four-wheel-disc-brake-piston-tool-95713.html
>> or
>> http://www.idparts.com/catalog/product_info.php?products_id=402
>> 
>> If you try to use needlenose pliers, be prepared to replace the piston boots 
that you _will_ rip when the needlenose slips.
>> 
>> -Ian Duff.
>> On 22 Sep, 2010, at 20:56, Konstantine Bogach wrote:
>> 
>>>  Hi,
>>> 
>>> I am changing rear rotor/pads and need to get the piston into the
>>> caliper.  Do I need to screw it onto  or just press it in?  I remember
>>> there is a threaded shaft inside to push the piston by parking brake
>>> mechanism.  It makes me doubt.
>>> I rebuilt 4 of them in the past but time did not spare memories.
>>> 
>>> Thanks.
>>> Konstantine
>>> _______________________________________________
>>> S-CAR-List mailing list
>>> http://audifans.com/mailman/listinfo/s-car-list
>>> http://www.audifans.com/kb/List_information
>> 
> 
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