Audi Brake Issues

[Bernie Benz]

Dave,

No experience with the caliper lock when hot syndrome.
  But if all calipers lock at once and to the same degree, has to be  
the MC not releasing the brake hydraulic pressure back to the reservoir.
If the MC, can only be influenced by the temperature under the hood,  
not caliper temp.
MC piston must return to its at rest position to uncover the  
reservoir bleed/ feed port.
Sludged up MC or PB servo not allowing piston full return?


On Jul 7, 2011, at 12:21 PM, Dave Defferding wrote:

> Hi Bernie,
>
> I've been going to write you, as I've (my car that is) has  
> experienced the caliper lock when hot syndrome a few weeks ago...   
> They released when everything cooled off and I drove home a few  
> miles using only the parking brake to stop.  I have flushed the  
> system every two years, but haven't dissambled and cleaned the  
> front calipers-- don't rag on me too hard...  I'm guessing, as  
> others have mentioned the "sticking" problem is in the master  
> cylinder and not the calipers though.  Remove it and flush  
> thoroughly perhaps??  Give me you input please.
>
>
> Dave D
> ----- Original Message ----- From: "Bernie Benz" <b.benz at charter.net>
> To: "200q20V mailing list" <200q20v at audifans.com>; "Audi 20V"  
> <20v at lists.20v.org>
> Sent: Thursday, July 07, 2011 11:34 AM
> Subject: PS pump head leaks, more than you ever wanted to know.
>