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Re: Help: Hydraulic Fluid Leak
Your steering rack is leaking, most likely. Very common problem on
Audi vehicles. I put a rebuilt in my '87 5K CST a few weeks ago. Car
had about 104K miles.
Check to see if the rubber boot on the driver's side of the rack has
any fluid in it. (Sometimes the bottom of the boot will be damp.) Some
folks can tell by the feel...the fluid will 'squish' inside the boot.
For best check, loosen the clamp and slide the boot toward the
passenger side. If there is fluid in it, the rack will need to be
The Bently manuals cover the replacement pretty well. It is not
particularly difficult, but is rather time consuming: 6 to 8 hours for
the first time is common. Rack comes out through the passenger side
wheel well. Depending on your budget, you may want to replace other
hoses and clamps while you are about it. The high pressure hose runs
Rebuilt racks go from around $225.00 to $275.00, and you will need
some extra hydraulic fluid and banjo bolt sealing rings. (Used where
hoses connect to the rack body.) Used racks can be had, but for only
about $50.00 or so less than rebuilt. There is a core charge, refunded
when you return your old rack to your place of purchase.
I would recommend changing the rack ASAP if that proves to be the
problem. I tried to limp for a while on mine, then one day it really
broke loose. I was close enough to home to make it, just glad I wasn't
on a longer trip!
'87 5K CST
Footnote: Best prices I found were from AudiOnly in Colorado (303)
376-4341) and Blaufergnugen in Wisconsin (1-800-683-2834) Both quoted
me $225.00 for a rebuilt and $100.00 core charge. IUD.
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Subject: Help: Hydraulic Fluid Leak
Author: "KEN" <email@example.com> at IPNET
My 5k has developed a hydraulic fluid leak. I top up the canister and it falls
below the MIN mark within 6 weeks. There are small drops of fluid under the
car below the firewall, but I can't see any leaks around the hose connections.
Where should I look? How can I test for leaks? The car has approx 105k miles
Thanks in advance for any advice.