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2011 5.0L Coolant Leak

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Old 11-27-2015, 01:37 PM
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Originally Posted by SA73
Just putting this out there, have not read the whole thread, since my tank was replaced. The leak at the t connector I had too recently and is easily fixed by changing out the O ring that's inside. It's a Ford part it's updated in design. Costs 10$. Easy fix. Dealer wanted 460 including replacement hose and t connector.
Oh nice, do you have a part number for that o ring? I cant find a separate part number. Thanks!
Old 11-28-2015, 08:04 AM
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Default Part number.

Originally Posted by 2011 f150 5.0L
Oh nice, do you have a part number for that o ring? I cant find a separate part number. Thanks!
Yes I still have the package, saved it to help someone else some day. However it is in the truck and has been at the dealers for a week, I will get it when I can get it back.
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Old 11-28-2015, 11:40 AM
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Google ford part number 8590

Now the images all show a squared off o ring like the original one was, however the one I got was round like a typical o ring. The fit was much better. So it is possible that Ford has updated it.
I will verify with the packaging next week.
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Old 11-28-2015, 09:19 PM
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Originally Posted by SA73
Google ford part number 8590

Now the images all show a squared off o ring like the original one was, however the one I got was round like a typical o ring. The fit was much better. So it is possible that Ford has updated it.
I will verify with the packaging next week.
I currently have this same leak. I believe the part number is BC3Z 8590F
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Old 12-03-2015, 07:01 PM
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So, I now have this problem too, and called the local dealer to get a quote for repair...

$475 for the tank, hose, and flush.

The part was still $280, but their computer is only saying .6 hours for labor (plus the flush).

That was much less than I was expecting, and worth it, to me, to have new parts put in the truck. I'm not against doing a repair, however, in the future.
Old 12-04-2015, 03:08 PM
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Originally Posted by jhealis
So, I now have this problem too, and called the local dealer to get a quote for repair...

$475 for the tank, hose, and flush.

The part was still $280, but their computer is only saying .6 hours for labor (plus the flush).

That was much less than I was expecting, and worth it, to me, to have new parts put in the truck. I'm not against doing a repair, however, in the future.
Really? parts that are proven to fail vs. parts that are 1/10th the price and will last a lifetime?

This is such an easy fix, I barely do any of my own truck work. But for $50 and putting a milk jug below the coolant drain, cutting the hose, using a screwdriver to tighten the hose clamps, then pouring the 1 gal of drained coolant back into the tank. easiest $425 saved in my life!

Last edited by 2011 f150 5.0L; 12-04-2015 at 03:12 PM.
Old 12-04-2015, 03:12 PM
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Originally Posted by 2011 f150 5.0L
Really? parts that are proven to fail vs. parts that are 1/10th the price and will last a lifetime?
I've decided to go with the new o ring instead. It's a cheap part that shows some success.
If that fails I know what solution to use.
Old 12-05-2015, 06:42 AM
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Here is the O ring that i changed from the T connect to stop the leak
Attached Thumbnails 2011 5.0L Coolant Leak-image-4065819531.jpg  
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Old 12-05-2015, 09:11 AM
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Originally Posted by Hassan
Here is the O ring that i changed from the T connect to stop the leak
Yes that's the one.
Old 12-05-2015, 01:37 PM
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Originally Posted by jhealis
I've decided to go with the new o ring instead. It's a cheap part that shows some success.
If that fails I know what solution to use.
the o ring fix discussed is for a different leak, or maybe you found a smaller o ring for the leak near the tank?


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