[s-cars] Hydraulic groan when turning

[Tom Green]

Chris,

Just to be clear, that is just a guess from a distance as to why the  
rack
groans.  It could also be some debris in the fluid restricting passages
in the rack and lines.  This is usually bits from deteriorating hoses  
and
seals.  A thorough fluid flush could be a first step since it will be  
required
anyway if you are replacing the rack.  Don't forget to flush the brake
system as well.

Of course, if you do find the rack leaking, you may just want to do the
rack replacement now.

Tom

On Feb 19, 2009, at 12:04 PM, chris chambers wrote:

>
> Tom,
>
> yes that does make sense, I do recall being told  the rack has a  
> "minor" leak.
> Sounds like I am going to have to replace the rack to get rid of the
> groan.
>
> Thanks
> Chris
>
>
>
> --- On Thu, 2/19/09, Tom Green <trgreen at comcast.net> wrote:
>
>> From: Tom Green <trgreen at comcast.net>
>> Subject: Re:[s-cars] Hydraulic groan when turning
>> To: s-car-list at audifans.com
>> Cc: "chris chambers" <fastscirocco_2000 at yahoo.com>
>> Date: Thursday, February 19, 2009, 10:40 AM
>>> Chris,

>> I think intuition will tell you the groan is in the
>> steering, not the
>> brake
>> portion of the hydraulics, Chris.
>>
>> It could be the pump to rack pressure hose, which has a
>> restrictor also,
>> but I think you will find the groan is in the rack caused
>> by some
>> internal
>> seal leaking. If it is the hose, the system will transmit
>> pump pulses
>> to the
>> steering wheel.
>>
>> Hopefully, you will not be groaning as well.
>>
>> Tom
>>
>>> -----Original Messsage-----
>>> Date: Thu, 19 Feb 2009 07:13:51 -0800 (PST)
>>> From: chris chambers
>> <fastscirocco_2000 at yahoo.com>
>>> Subject: Re: [s-cars] Hydraulic groan when turning
>>> To: Scar <s-car-list at audifans.com>, Kent McLean
>>> 	<kentmclean at comcast.net>
>>> Message-ID:
>> <529385.89744.qm at web65411.mail.ac4.yahoo.com>
>>> Content-Type: text/plain; charset=us-ascii
>>>
>>>
>>> Kent
>>>
>>> thanks for the info, I'm going to try swapping out
>> that hose and
>>> hopefully the groan will go away!
>>>
>>>
>>> Thanks
>>> Chris
>>>
>>>
>>> --- On Thu, 2/19/09, Kent McLean
>> <kentmclean at comcast.net> wrote:
>>>
>>>> From: Kent McLean <kentmclean at comcast.net>
>>>> Subject: Re: [s-cars] Hydraulic groan when turning
>>>> To: "Scar"
>> <s-car-list at audifans.com>
>>>> Cc: fastscirocco_2000 at yahoo.com
>>>> Date: Thursday, February 19, 2009, 10:07 AM
>>>> chris chambers wrote:
>>>>> Now that it is driveable I've discovered
>> when
>>>> turning the hydraulics
>>>>> groan. Tech advised it was a bad pump so I
>> swapped a
>>>> known good used
>>>>> pump from my wrecked S4 and it still groans.
>>>>>
>>>>> I seem to recall that there is a hydraulic
>> line that
>>>> fails that if
>>>>> rebuilt sometimes a restrictor is left out
>> causing the
>>>> hydraulics to groan.
>>>>
>>>> I believe the "J" hose has the
>> restrictor.
>>>> Don't ask me which one that is.
>>>>
>> <http://www.audifans.com/pipermail/s-car-list/2004-January/ 
>> 024255.html
>>
>>>>>
>>>>
>>>> -- Kent McLean
>>>> '99 A4 Avant, V6 Tiptronic
>>>> '91 200 TQA #3, with mods
>>>> gone: '91 200 TQA x2, '94 100 S Avant,
>> '89 200
>>>> TQ
>
>
>