G-60 rebuild or?

[Kneale Brownson]

Be sure the chunk of wood is thick enough the first piston to pop doesn't
extend so far there's no seal to pop the second one.

At 12:45 PM 2/4/2005 -0500, Ingo Rautenberg wrote:
>Bernie,  Thanks for the advice.  Will have to go the air route (caliper
>removed from car) and avoid flying projectiles.
>
>As to bleeding the system biennially (every two years), I'm already bleeding
>the system biannually (twice a year).  Not to say how often it was done
>before I bought the car or that tracking may have boiled the fluid ;-)
>
>-Ingo
>
>----- Original Message ----- 
>From: "Bernie Benz" <b.benz at charter.net>
>To: "Ingo Rautenberg" <i.rautenberg at waratap.com>
>Cc: "200q20V mailing list" <200q20v at audifans.com>
>Sent: Friday, February 04, 2005 12:23 PM
>Subject: Re: G-60 rebuild or?
>
>
>> Ingo,
>>
>> If the caliper is still attached to the brake hydraulics and loose from
>its
>> carrier, you can use the brake pedal, otherwise use air pressure.  Put a
>> piece of wood across the caliper to catch the first to free piston before
>it
>> leaves its bore, or it will be across the room and you'll not get the
>second
>> one to pop.  If frozen as you describe, plan to overhaul all 4.  You'll
>> agree after you see the insides of the first one.
>>
>> If the boots are good you don't need rebuild kits, just a good internal
>> cleaning of all parts, seals and seal grooves.  Polish the chrome plated
>> pistons with 600 grit paper.  I use a silicone fluid as assembly lube.
>> Hereafter bleed the hydraulics biennially, to eliminate the problem.
>>
>> Bernie
>>
>>
>>
>> > From: "Ingo Rautenberg" <i.rautenberg at waratap.com>
>> > Date: Fri, 4 Feb 2005 10:48:10 -0500
>> > To: "UrqList" <urq at audifans.com>, "200q20v List" <200q20v at audifans.com>
>> > Subject: G-60 rebuild or?
>> >
>> > Just replaced the seized right front G60 caliper on the Urq with one
>from the
>> > V8 and was hoping for words of wisdom.  I initially thought the carrier
>pins
>> > were frozen (usually the case) though I tend to lube them up and check
>them
>> > periodically.  Mine were fine.  The pistons were (are) stuck.  The boots
>are
>> > intact as far as I can see.  So what do I do?  Don't want to distort the
>> > pistons by using vise-grips or the like...
>> >
>> > -Ingo
>> > '91 200q20v...Slightly modified
>> > '84 Tornado Red Urquattro Euro spec
>> > '91 v8 quattro 5-Speed (not exactly stock) :-)
>> > '91 V8 pearl (new addition)
>> > http://hometown.aol.com/quattringo/index.html
>> >
>> >
>> >
>> >
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