[s-cars] High pressure hydraulic line

[Fred Munro]

Igor;

>From what I recall of previous posts on this subject, leaving the restrictor
out results in groaning and pulsation in the power steering hydraulics. I
also recall one poster that postulated the thin-walled OEM hose and foam
cover also dampens noise based on his experience with a thick-walled
hydraulic hose rebuild that included the restrictor and still resulted in
noise.

It's your call - let us know how whatever you do works out, I'm sure this is
coming up for all of us.

My block heater just quit yesterday, my rad started leaking at the right
head tank seal, and it's been -30 for the last week - sigh...

Fred Munro
'94 S4


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Igor Kessel
Sent: January 10, 2004 11:20 PM
To: Audi S-list
Subject: [s-cars] High pressure hydraulic line


Folks,
the High pressure hydraulic line 4A0-612-065 from the P/S pump to the
bomb is weeping. Also, the light stays on for a long time after the
startup,  and the sys looses pressure rather quickly after I turn the
ignition off. The bomb is good (~35 pumps).

Here's what I found in the archives:
--
From:  MLBess at a...
Date:  Tue Oct 31, 2000  10:12 pm
Subject:  Re: [s-cars] High pressure hydraulic line replacement

The
service foreman ultimately performed some tweak on my system such that the
light extinguishes immediately. He stated he removed some restrictor in the
hydraulic system. Supposedly there is a restrictor orifice that is used to
reduce the pulsing in the system. Again I cannot separate fact from fiction.
Alll I know now is that the light does extinguish immediately upon engine
start.

Mike Bess
--

So, what's the consensus: to rebuild it at a local hydraulic shop? Or to
open it up, remove the restrictor and reseal with the new Viton O-rings?
Or to bite the bullet and buy a new hose from the dealer for ca. $280?

--
Igor Kessel
two turbo quattros

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