Re: Penosin Fountain

["Fred Munro" <munrof@isys.ca>]

Ron,
    I've been thinking about this, and my musings of yesterday may not, umm,
hold oil, to paraphase a common expression. Oil is non-compressable, and if
the intake flow of the pump is reduced, so is the output, and the reservoir
should not overflow.
    If the pump is adding air to the oil, however, the oil becomes
compressable and increases in volume, which may cause an overflow.
    I know some listers have been through this problem, so I hope you get
some BTDT's.

Fred Munro
'91 200q  264k km
-----Original Message-----
From: Fred Munro <munrof@isys.ca>
To: Ron Husak <RHusak@compuserve.com>; quattro@coimbra.ans.net
<quattro@coimbra.ans.net>
Date: Monday, December 21, 1998 8:54 PM
Subject: Re: Penosin Fountain


>Hi Ron;
>
>    Ah yes, I believe this is called the volcano syndrome. Previous posts
>have attributed it to a faulty hydraulic pump. There should be no pressure
>in the reservoir - a faulty cap is unfortunately not the problem. More
fluid
>is being returned to the reservoir than is being drawn out by the pump, so
>you get an overflow. It is usually a closed system - the pump pulls from
the
>reservoir, pumps through the steering rack, and the fluid is returned to
the
>reservoir. A separate line charges the bomb and the fluid used in braking
>assist is returned to the reservoir through the brake servo. The volume
>required to get a volcano must be coming from the power steering circuit -
>perhaps the pump suction flow is interrupted or reduced?  I haven't BTDT,
so
>I can't offer much more in the way of advice.
>
>HTH
>
>Fred Munro
>'91 200q  264k km
>-----Original Message-----
>From: Ron Husak <rhusak@csi.com>
>To: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
>Date: Monday, December 21, 1998 9:48 AM
>Subject: Penosin Fountain
>
>
>>Hi,
>> I have had a very strange thing happen to my newly acquired 91 200 20
>>valve. It suddenly sprayed all of it's fluid (Penosin) out of the top of
>the
>>reservoir cap ( sensor). Obviously, maybe not so obvious... I cannot drive
>>the car this way. Could it just be a failed cap?
>> I had no idea there was so much pressure under this cap!
>> Any other ideas?
>> Thanks in advance for your input...
>> Ron Husak
>>
>>
>>
>