2007 Ford Expedition power steering pressure

Tiny
CHAR411998
  • MEMBER
  • 2007 FORD EXPEDITION
Steering problem
2007 Ford Expedition V8 Two Wheel Drive Automatic

I have just replaced a bad a/c condensor on a 07 ford expedition because it was leaking freon. When I installed the new condensor I hooked up the power steering hoses as required. When I started the engine the pressure increased and blew the hose off where it attaches to the condensor. I put it back on and started the engine again and added power steering fluid. The pressure increased again and blew the hose off a second time.

I am wondering if I am doing something wrong that is causing this pressure. The condensor was brand new. Should I try filling it with power steering fluid or something else?

It was not complicated to change and all went well except for the pressure.

Pls advise on what I might be doing wrong.

PS I did check to make sure the condensor was not plugged. I removed the opening at the bottom and noticed a large white material like filter inside which I have never seen before. I left it in place and sealed it again.
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Monday, August 2nd, 2010 AT 10:25 PM

5 Replies

Tiny
CARADIODOC
  • EXPERT
Hi char411998. Welcome to the forum. Are you working on the AC system or the power steering system? Both use hoses that are bolted on. They can't simply blow off and be reattached. The exception would be a previously-repaired AC hose that has a special hose clamp, but those would never hold up to power steering system pressure.

Kindly clarify why you're working in two different systems. Also please describe the type of connection where this hose came apart.

Caradiodoc
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Tuesday, August 3rd, 2010 AT 2:52 PM
Tiny
CHAR411998
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I rec'd your response. I am replacing the a/c condensor. This particullar condensor has 2 a/c hoses on the passengers side and they bolt on. There is no problem with that area.

The driver's side of the vehicle has two hoses that go into the condensor. Thiese two hoses are specifically for the power steering unit. Each are held on by a spring loaded type clamp. This is the way it came from the factory as I bought the vehicle new and it has never been worked on.

I can't think of how to be more speicifc with details than this.
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Tuesday, August 3rd, 2010 AT 3:17 PM
Tiny
CARADIODOC
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I think you're referring to a power steering fluid cooler, not a condenser. There is no condenser in the power steering system, hence everyone's confusion.

Coolers, when used, are in the low pressure return side of the hydraulic system. That's why simple hose clamps are sufficient for the job. Look inside the metal tubes of the cooler to see if there are plastic plugs that you forgot to remove. The only way for pressure to build up that high is for the return hose to be blocked. The same thing happened once to someone who didn't see a protective cap on the lower tube of a radiator because it was painted black along with the rest of the tank.

Caradiodoc
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Tuesday, August 3rd, 2010 AT 7:38 PM
Tiny
CHAR411998
  • MEMBER
I rec'd your message and wanted to let you know what I found.

First I want to let you know that I finally decided I was going to have to figure this problem out for myself because I only came to your organization when I had checked, double checked and triple checked all my work.

I finally removed the new a/c condensor and placed it side by side with the original condensor. I then was able to see the problem. The top few passages of the a/c condensor is for the power steering fluid. Those passages on the original were much wider than that of the new one. The new condensor passages were so small that fluid was unable to travel through it which is what was causing the the pressure build up and blowing the hose off.

Although it might be somewhat unusual to have to second guess a manufacturer, in my case that is exactly what had to be done. I found the problem then bought another condensor from another company and it worked perfect.

So I guess I am saying that it doesn't necessarily have to be a blocked hose as you stated. Although I am not a licensed mechanic I do have enough common sense to make sure there are no caps/plugs prior to ever contacting someone for serious guidance on an unusual problem. I don't think I got much of that guidance for this purchase.

Sincerely,

Scott Higgins
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Friday, August 6th, 2010 AT 12:28 AM
Tiny
CARADIODOC
  • EXPERT
Didn't mean to imply anything about the plugs. I saw it happen to a very experienced mechanic. As I mentioned though, that was on a radiator. What led me to that was your comment:

"I removed the opening at the bottom and noticed a large white material like filter inside which I have never seen before. I left it in place and sealed it again."

Have you figured out what that stuff was, and what did you mean by "sealed it again"?

Happy to hear you solved the problem. I wonder how many other people are going to run into the same problem with that product.

Caradiodoc
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Friday, August 6th, 2010 AT 2:30 AM

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