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Old 01-29-2020, 06:59 PM
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pump pressure line leak madness. Best Practices?

2000 ford windstar 3.8L

The pump went bad. My son drove it for a while whit the bad pump.
Eventually it was so bad, it was stalling the engine.

He and a friend replaced the power steering pump ( he's 19 ).
After the fact, he told me they dropped and lost the seal that came with the new pump. They tried to put a rubber o-ring in there. The pressure line.

well that didnt work at all. I went to Ford today and got the seal.
It was a hard plastic ring. I was a little surprised. it is very thin.
I pictured a rubber o-ring, thats not what they handed me.

Well he put that in the pump, not around the threads of the pressure line nut, but seated in the pump. I didnt see it, but it probably goes in ONE way:
Seated in the housing. Well,....he told me it stopped leaking.
Then he ran low on fluid and stalled out at a gas station.
It is leaking. Badly
What am I missing? Did Ford possibly give me the wrong seal?
I told him to NOT over tighten the nut. Maybe I should check that?
He's just learning.
Thanks

So.. In general, what are some things to watch out for?
Should I just replace the line, which is original. Im surprised its been so problematic. There are no torque ratings listed in my book, but its aluminium.

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Old 01-29-2020, 07:52 PM
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I should have started with "Power steering pump"
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Old 01-29-2020, 10:20 PM
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Sounds like the seal got jammed up in there.
I’d get a new one, put it in the pump carefully making sure it’s fully seated and reinstall the line.

The nut pushes on the crimp bead and the very end of the line gets smashed into the seal to create the connection. I don’t know of a torque spec for those but finger tight snug with about a half turn more is about right. Just like a bolt, when your tightening up something you feel the resistance dramatically increase. Keep going and the bolt shears, the threads pull out or something bad. You’ll wanna stop at the beginning of the dramatic resistance increase. Also known as just tight enough to not leak.

Some friends and I cut all the wrenches and ratchets in half so that Chris would stop breaking off bolt heads and pulling out threads on the regular. We gave him his real tools back after about a month when he finally learned he’s a big guy and doesn’t need to use all of his might tightening nuts and bolts like he’s trying to hold the north and south poles together.
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Old 01-30-2020, 10:30 AM
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Quote:
Originally Posted by johnsongrass1 View Post
Sounds like the seal got jammed up in there.
Iíd get a new one, put it in the pump carefully making sure itís fully seated and reinstall the line.

The nut pushes on the crimp bead and the very end of the line gets smashed into the seal to create the connection. I donít know of a torque spec for those but finger tight snug with about a half turn more is about right. Just like a bolt, when your tightening up something you feel the resistance dramatically increase. Keep going and the bolt shears, the threads pull out or something bad. Youíll wanna stop at the beginning of the dramatic resistance increase. Also known as just tight enough to not leak.

Some friends and I cut all the wrenches and ratchets in half so that Chris would stop breaking off bolt heads and pulling out threads on the regular. We gave him his real tools back after about a month when he finally learned heís a big guy and doesnít need to use all of his might tightening nuts and bolts like heís trying to hold the north and south poles together.

Thats hilarious. You know you gain a feel for torque over the years.
He is just starting, so he doesnt even have a reference point. I told that in the world of DIY mechanics, everyone over tightens everything . I stressed to him to NOT over tighten it. Maybe I should check that its not too loose.
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Old 02-02-2020, 09:03 AM
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So the issue was that the line seals in a different way than othe common pressure lines.
My son took it apart and lost the replacement seal.
So I was trying any o-ring I could find, seated in the pump.
The line actually seals between the nut and pump housing.
There is no seal on the line, or that seats in the housing.
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