[urq] RE : 85 - Brake conversion questions

[Ingo Rautenberg]

L-A:

You mean the piston O-rings?  I think that's what you mean by square
O-rings.  Hmm.  Interesting.

Ingo

----- Original Message ----- 
From: "Louis-Alain Richard" <laraa at sympatico.ca>
To: <audijim at comcast.net>; <urq at audifans.com>; "Felix Tang"
<ftang at dragonartz.com>
Sent: Wednesday, November 15, 2006 2:00 PM
Subject: [urq] RE : 85 - Brake conversion questions


> Or, in my car, the problem was that the rear calipers were rebuilt without
any
> lubricant on the square o-ring... So they always dragged a bit after a few
> hundred kilometers.
>
> I was able to pinpoint them with my new Mastercool Infrared thermometer.
You
> drive on a deserted road for a few km, then you coast to a stop without
touching
> the brakes, and shoot each disk with the IR thermometer. I discovered that
after
> replacing the brake hoses, brake cables, new disks and pads all around. I
was
> ready to order a new proportionning valve (since the MC was replaced 2
years
> ago) when someone told me to open the rear calipers to see if the pistons
were
> returning fully. All that was needed was some silicone grease on the
pistons and
> the square-section o-ring and the situation is corrected.
>
> Louis-Alain
>
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