Rear brake caliper

[SuffolkD at aol.com]

In a message dated 12/2/2005 3:59:22 AM Eastern Standard Time, 
quattro-request at audifans.com writes:


David:  MAybe Brett's post has the answer, I haven't read it yet.
The 200 series has a bias valve to lessen brake fluid to the rears (to twart 
lockup) under braking.

I find jacking the rears up to bleed the rears actually makes the mechanical 
valve do its thing and squeeze off fliud to the rears.  Try to bleed on all 4 
wheels (level) and keep the PSI to 15 max for the ABS circuit.

It takes a while.....................
HTH - Scott by BOSTON

> From: David Torrey <>
> Quattro list
>    
>   Yesterday, I replaced the front rotors and pads on my '93 100CSQ Avant.  
> While I was at it,  I bled the brake system and filled with new fluid.  When I 
> got to the left rear caliper the brake fluid was barely escaping through the 
> bleed nipple.  I boosted the pressure on my bleeder to 25 psi which helped 
> out slightly.  Has anyone experienced this?  I didn't take the time to 
> disconnect the brake hose going in to the caliper to determine if I had adequate 
> flow before going in to the caliper.  This caliper has emergency brake linkage 
> as well.  I wonder if there is an internal problem with the caliper or 
> possibly something wrong with the ABS controller?
>    
>