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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 02-17-2013, 12:21 AM   #1 (permalink)
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power steering leak?

Just finished installing the banks sidewinder turbo when I started running down where a oil leak was coming from. Turns out the leak is coming from the power steering pump. It is a hard line that runs out of the pump right below (approximately 4-5 inches) the cap. This line goes down and loops around and circles around on the dana 50. I'm assuming that the line is to help cool the fluid as it loops around all over the place. I tried to tighten the line but it is very tight. I wiggled the line around and you could see it moving inside the fitting. Do I have to replace the entire line or is there some kind of fix for this without replacing the whole thing?

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Old 02-17-2013, 05:55 AM   #2 (permalink)
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what does the end of the line look like? probably you can cut and re-flare
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Old 02-17-2013, 06:02 AM   #3 (permalink)
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That's the pressure line to the gearbox, and most likely the nylon seal on the fitting is damaged and causing the leak. This hose is kind of a PITA to replace because of the way the pressure & return lines intertwine at the gearbox. I replaced mine maybe 3 months ago, and IIRC there was still a little movement when everything was tightened up.
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Old 02-17-2013, 06:05 AM   #4 (permalink)
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the teflon seal at the pump is teeny, I'm not sure it would cause that much motion
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Old 02-17-2013, 03:23 PM   #5 (permalink)
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I have to do my initial start up from the turbo install and then I'm going to start tracking down the problem. hopefully its just the seal...
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Old 02-17-2013, 03:25 PM   #6 (permalink)
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does anyone have a part number for the seal? If I remove the line will I lose a lot of power steering fluid?
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Old 02-17-2013, 03:28 PM   #7 (permalink)
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Quote:
Originally Posted by drinkypoo View Post
what does the end of the line look like? probably you can cut and re-flare
I'm pretty sure that its a flared end but have not removed yet for fear i'm going to lose a lot of fluid. Which doesnt matter but I dont have time to deal with it at the moment.
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Old 02-17-2013, 08:34 PM   #8 (permalink)
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Well, if we're talking about the fitting on the side of the typical ford steering pump that is on the D/S and then hooks sharply down, that IS the high pressure side, it IS a teflon seal, it IS a PITA, and you CAN get them at Napa (At least, mine had them.) Get this, you're going to love this, you're supposed to stretch the seal, but not too far, then slip it into place rapidly before it contracts. This did not work for me, stretching it on a taper. It would always recover too quickly. I installed it with a seal pick and it's not leaking.

As you feared, most of the fluid will spew out of the reservoir. You will need more, and it would be nice to catch the old stuff because there will be plenty.
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Old 02-17-2013, 09:41 PM   #9 (permalink)
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Thanks, well at least I dont have to replace the whole line (I hope) because the way that thing snakes around it looks like a nightmare to change. Anyways I'll swing by napa tomorrow and see if I can pick one up.
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Old 02-17-2013, 10:50 PM   #10 (permalink)
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get two or three, they are small and cheap and easy to lose or damage. I taped mine to my receipt to get them home.
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Old 02-17-2013, 11:50 PM   #11 (permalink)
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Would this kit have all the seals I need (teflon seal)? I read somewhere that if it is leaking between the hose and the fitting that you would need to replace the line. Any truth to that?

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Old 02-18-2013, 10:28 AM   #12 (permalink)
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I have had these lines come apart at the pump because the little block that keeps the line in the nut has worn the nut or itself enough to allow it to blow out. If this is the case the nut is tight but you can pull the line out of the back without any problem.
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Old 02-18-2013, 03:59 PM   #13 (permalink)
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No and maybe, respectively. The teflon seal is a very thin quad seal of about 9/16", and it's white. If the seal goes it might be possible for fluid to come out where the line is, but I suspect it means the line is bad.
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Old 02-19-2013, 02:35 PM   #14 (permalink)
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Quote:
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the teflon seal at the pump is teeny, I'm not sure it would cause that much motion
If I remember correctly, the power steering hose joints are designed to move/flex to relive stress, even with new seals. Don't be surprised if you are still be able to move/wiggle the end of the line around after the new seal is installed.
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Old 02-19-2013, 05:50 PM   #15 (permalink)
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Yeah, I think the end of the line can be moved around, but it doesn't feel loose at all either.
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1982 MBZ 300SD W126 California model w/Sunroof, no EGR
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