Brake bomb washers

Bernie Benz b.benz at
Tue Jun 7 22:53:42 EDT 2005

> From: "alan cordeiro" <alancordeiro at>
> Extra torque will not stop the leak if the rubber o-ring has not been
> compressed sufficiently to hold back the pressure once the banjo fittings
> begin to touch metal to metal.
Right you are Alan!  Washers or O-rings?  Not clear.  I had in mind the
older Cu washer banjo seals.
> Your o-ring diameter (cross sectional of the rubber ring) may be too small
> on the new rings, and the old ones may have lost some of their original
> flexibility.
A fleck of dirt is the more likely cause under an old O-ring, but an old,
stiffened and slightly twisted reused ring could cause a low pressure leak
that would seal fine uner a higher pressure.

> ----- Original Message -----
> From: "Bernie Benz" <b.benz at>
> To: "Mike Del Tergo" <mdeltergo at>
> Cc: "200q20V mailing list" <200q20v at>
> Sent: Tuesday, June 07, 2005 10:01 PM
> Subject: Re: Brake bomb washers
>> Just use a longer wrench.
>>> From: "Mike Del Tergo" <mdeltergo at>
>>> Date: Wed, 08 Jun 2005 01:24:54 +0000
>>> To: 200q20v at
>>> Subject: Brake bomb washers
>>> I replaced the bomb in my 91 avant last month.  A small PITA but no
> biggie
>>> and good to go till this AM as I noticed a snail trail from the car as I
>>> exit Dunkin Donuts, great.  Took me a minute to place it as Pentosin.
> Its
>>> not very green on the pavement.  Appears to be leaking from the Banjo
>>> fitting.  I didn't replace the O rings so go to local FLAPS.  They don't
>>> have the "same" red ones so went with 11mm standard black.  Leak is much
>>> worse!  ARe there speacial O rings or Audi only?
>>> thanks
>>> Mike
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