pinhole leak in power steering pump line - Mercedes-Benz Forum

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Old 07-27-2010, 09:59 AM   #1 (permalink)
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Date registered: Apr 2009
Vehicle: 1988 560SEL
Location: raleigh nc
Posts: 80
pinhole leak in power steering pump line

A couple days ago I noticed a slight moan during sharp turns at low speed. I checked the power steering fluid and noticed it was low so i topped it up with some prestone power steering fluid WITH STOP LEAK. It seemed to fix the problem for a day and then while on my 2 hr jaunt to the beach the power steering totally fails about half way. When I pop the hood everything is coated with fluid and my hood pad is soaked. The leak is tiny and right by where the metal line starts. As a quick fix i tried to put some steel apoxy on there but I'm not getting great results. Do I have to replace this entire line just for this tiny pinhole leak?
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Old 07-27-2010, 11:15 AM   #2 (permalink)
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Date registered: Jul 2004
Vehicle: 1987 560SEC Now 130K mi.
Location: Boston, MA area
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Hello there,

In answer to your query: " Do I have to replace this entire line just for this tiny pinhole leak? "

Yes, you must replace the line.

Cheers, MBL
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Old 08-02-2010, 04:44 PM   #3 (permalink)
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does anyone have a diagram or directions on how to change this line? i've been looking on the forum here but can't find any detailed instructions. the side going into the pump looks straight forward but I'm not sure how to detach the other side going into the steering box.
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Old 08-03-2010, 09:35 AM   #4 (permalink)
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It's easy. Replaced mine last night due to a leak. 17mm wrench fit both ends. Put the car on ramps to get underneath for the steering box end. The hardest part was the little bracket that holds it mid-line to the fender. It was hard to get the screw started back in afterwards because there's not much hand room. If any fluid is still in the system, you'll need something to plug the holes on the steering box and pump until you get the new hose ends installed. It'll drip out. I also changed the filter inside the pump while I was at it.
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Old 08-03-2010, 01:07 PM   #5 (permalink)
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Date registered: Apr 2009
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Quote:
Originally Posted by Steve420SEL View Post
It's easy. Replaced mine last night due to a leak. 17mm wrench fit both ends. Put the car on ramps to get underneath for the steering box end. The hardest part was the little bracket that holds it mid-line to the fender. It was hard to get the screw started back in afterwards because there's not much hand room. If any fluid is still in the system, you'll need something to plug the holes on the steering box and pump until you get the new hose ends installed. It'll drip out. I also changed the filter inside the pump while I was at it.
sounds easy enough. thanks steve. i'll be going on ebay to buy the part right now.
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Old 08-07-2010, 12:00 PM   #6 (permalink)
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of course it this job wasn't as easy as i thought it would be. when i'm trying to take the side that goes into the steering box the nut isn't turning.

and the end going into the steering pump won't turn at all. i've put some pb blaster on both end and am going to let it rest for awhile.

can these lines seize? i don't see how that is possible.

Last edited by jdg15; 08-07-2010 at 01:46 PM.
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