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Old Mar 22, 2010 | 11:37 PM
  #1  
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PS puked

Has anyone ever had your power steering reservoir puke about a quarter quart of PS fluid while it is sitting (not running) in the driveway?

I awoke to find a large puddle under the PS pump. I thought it had a leak, but it looks like the fluid pushed up past the reservoir cap.

I added some fluid, ran it and had no issues. There has been no puddle since.

Steering doesn't groan any more than normal, and the brakes (hydroboost) work great.

Anyone ever had this happen, or know what caused the spill?



This is on a 2000 F250 with 7.3L and approx 235,000 on the clock.
 
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Old Mar 23, 2010 | 02:11 AM
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Maybe a bad cap seal, just taking a stab at it.
 
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Old Mar 23, 2010 | 02:50 AM
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Yup

Mine has done it but I believe the engine was running. The only thing I can think of is the O ring on the cap is worn. I keep meaning to replace the cap but other things keep taking priority. It hasn't done it in about a year so....


Neil
 
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Old Mar 23, 2010 | 03:09 AM
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Did you by any chance turn the wheels with the truck off? Mine overflowed once while doing that.
 
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Old Mar 23, 2010 | 06:39 AM
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Originally Posted by twags6
Did you by any chance turn the wheels with the truck off? Mine overflowed once while doing that.
No. That is what was odd about it.
I have had a small amount of fluid leak out while changing brake pads or tie rod ends, but that was from turning the steering while the pump wasn't running.
This leak happened while it was sitting overnight.
 
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Old Mar 23, 2010 | 07:01 AM
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Did you put power steering fluid in your reservior, or transmission fluid? I don't know that this would cause the puking, but I just wanted to make sure because our pumps don't use power steering fluid and you specifically said "PS fluid" in your post.

Good luck.
 
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Old Mar 23, 2010 | 09:36 AM
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Yeah, our trucks take ATF for the PS system. As to why it puked sitting still not running, I'm at a loss. The system isn't sealed however -- there is a vent in the cap. It's not overfilled, is it??
 
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Old Mar 23, 2010 | 09:44 AM
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Mine did that when I cycled the steering with the motor off. It hasn't leaked anything since.

My explorer did that when it was new in 1992 when I had to push it and steer it with the motor off so I didn't think anything of it.

I would think its ok as long as it's not consistently leaking.

Did you cycle the steering or anything with the motor off?
 
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Old Mar 23, 2010 | 10:09 AM
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Originally Posted by Robert6401
Did you put power steering fluid in your reservior, or transmission fluid? I don't know that this would cause the puking, but I just wanted to make sure because our pumps don't use power steering fluid and you specifically said "PS fluid" in your post.
Yes, sorry.
I thought it went without saying. I referred to it as PS fluid because I put it in the PS reservoir. I added ATF when it puked.
I should have been more clear.



Originally Posted by Big Ruth
Did you cycle the steering or anything with the motor off?
Nope. I just parked it for the night.
 
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Old Mar 23, 2010 | 10:11 AM
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Originally Posted by PSD_Dan

Nope. I just parked it for the night.
Interesting. Maybe it just burped and came out the ventilation. I wouldnt be too worried as long as its not consistent.
 
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Old Mar 23, 2010 | 10:15 AM
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Originally Posted by Izzy351
The system isn't sealed however -- there is a vent in the cap. It's not overfilled, is it??
No, not overfilled.
When it pushed up through the cap, it looks like it came through the vent hole. My cap has 4 ribs in it with valleys between the ribs. There was fluid in the valleys when I checked it after noticing the puddle in the driveway. It looks like the valleys filled up and spilled over the side of the cap. From there, it ran down the reservoir, onto the gearbox and then to the driveway.
 
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Old Feb 28, 2021 | 03:10 PM
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Did you ever figure out what caused this? I had mine do this exact thing overnight.

Originally Posted by PSD_Dan
No, not overfilled.
When it pushed up through the cap, it looks like it came through the vent hole. My cap has 4 ribs in it with valleys between the ribs. There was fluid in the valleys when I checked it after noticing the puddle in the driveway. It looks like the valleys filled up and spilled over the side of the cap. From there, it ran down the reservoir, onto the gearbox and then to the driveway.
 
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Old Feb 28, 2021 | 06:22 PM
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Originally Posted by N8Dizzle
Did you ever figure out what caused this? I had mine do this exact thing overnight.

There are vids on how to change out the old TRANSMISSION oil in the power steering system. If the Transmission oil has not been changed for new in a few years, I would suggest doing that as a start.
 
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