Hydraulic fluid leak

Peter Schulz pcschulz at comcast.net
Fri Jul 7 16:09:46 EDT 2006


I think what you are describing is also known as the "pentosin volcano".

Basically air is getting mixed with the hydraulic fluid in the pump - 
either the pump seals or the supply line from the reservoir to the 
pump is allowing air to enter then compressed by the pump.

Check those too...


At 03:31 PM 7/7/2006, John Lagnese wrote:

>Does the freeze-up of the master cylinder (causing my RF wheel to drag)
>cause hydraulic fluid to overflow? I know I have seen several people
>with this problem. It seems to coincide with the brake pedal getting
>high and hard. I then see what appears to be fluid overflowing from the
>hydraulic fluid reservoir.
>I have a rebuilt MC on order. It's a lifetime guarantee from Double
>discount auto for $115. I already replaced the RF brake hose,
>eliminating the inexpensive first.
>91 200 TQ 20V
>200q20v mailing list    http://www.audifans.com/mailman/listinfo/200q20v

-Peter Schulz
Chelmsford Ma, USA

1991 200 20v Q Avant Titan Grey
1991 200 20v Q Avant Indigo Mica
1991 90 20v Q Red

1990 CQ silver (awaiting S2 engine transplant)
1991 CQ silver  (potentially replacing the 1990 for  the transplant)
1990 CQ red ( to part or not)

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