2011 5.0L Coolant Leak
01-19-2018, 08:47 PM
#451
Senior Member
OK, I got this done today and just finished topping off my coolant. I did remove the T-connector and to do that I removed the air intake and throttle body too, and I cleaned my TB while I had it off. Reinstalling the T-coneector was the hardest part for me. I did drain out about 1 gallon from the radiator drain using a hose like suggested. You really have to push that t-connector back on to get the Thermostat side small connector on. The O ring on the Thermostat side looked really good. The top radiator hose side was rounded out bad like everyone else. I did not remove the reservoir coolant hose due to if it is not the smaller 31x 4 mm and I reinstall it, then it may leak for sure. However if it does ever leak I will post what I find as it will be pretty easy to pop that off and deal with just the reservoir. I have to go back to work tomorrow and want to take my truck. So far I haven't seen any leaks but will check it again in the morning since it will be cold. One tip on the T-connector clamp kinda twist it to the left when you have it squeezed to help clear the under side and work it to the middle. There is also another hose I think a evap hose that you can unclip to give better access to the T-connector clamp. I did use the super lube silicone grease. So I replaced just to O rings the 37 mm and 31 mm. I believe she is fixed, thanks to Bobo.mo and all you guys on here.
Last edited by digitaltrucker; 01-19-2018 at 09:16 PM.
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Koolponycar (01-19-2018)
01-20-2018, 06:40 PM
#453
If anyone is still interested if there is an o-ring on the reservoir connector, yes there is. I think I attached a pic. I just installed the Pegasus kit. I would have tried just replacing the o-ring but the hose is new and the o-ring is fine but it still leaked. The shop wanted to R&R the tank next and that's when I went to the Pegasus kit.
01-20-2018, 08:21 PM
#454
Senior Member
01-21-2018, 01:07 AM
#455
Senior Member
If anyone is still interested if there is an o-ring on the reservoir connector, yes there is. I think I attached a pic. I just installed the Pegasus kit. I would have tried just replacing the o-ring but the hose is new and the o-ring is fine but it still leaked. The shop wanted to R&R the tank next and that's when I went to the Pegasus kit.
The following 2 users liked this post by OrdTech:
digitaltrucker (01-22-2018),
Koolponycar (01-21-2018)
01-21-2018, 10:34 AM
#457
Senior Member
http://www.theoringstore.com/index.p...oducts_id=2298
I ordered: 4mmx31mm and 4mmx37mm, need to remember what each was for?
see post 340 for use of the 2 o rings above, also post 364 for all 3 leaks including reservoir. post 399 for pegasus kit install
Last edited by digitaltrucker; 01-21-2018 at 11:04 AM.
01-21-2018, 12:10 PM
#458
Just for clarification, the measurements were from the o-ring itself pulled from the connector that goes on the bottom of the reservoir of a 2011 F150 5.0L.
a more precise measurement for the thickness is 3.5 MM. I was also answering KOOLPONYCAR. He was curious if the o-ring had a 31 mm ID. It does not.
a more precise measurement for the thickness is 3.5 MM. I was also answering KOOLPONYCAR. He was curious if the o-ring had a 31 mm ID. It does not.
The following 2 users liked this post by OrdTech:
digitaltrucker (01-21-2018),
Koolponycar (01-21-2018)
01-21-2018, 04:09 PM
#459
I ordered the o rings from the ebay link on here. I spent hours yesterday trying to reconnect the house to the T with the new O ring and it refused to go on. I lubed with the synthetic grease too. In all of the frustration, I lost the U clip. So I slid the hose back on with the old o ring and it went on very easily. After going to various auto repair stores and hardware stores, no one sells those clips. O'Reilly's brought out about 8 different radiator hoses with the clip (they don't carry the F150 hose) for me to look at. I bought the cheapest hose just for the clip ($21). It ended up coming from a BMW. I noticed the connection for this hose is exactly like the Ford connection. After additional failed attempts at attaching with the new o ring, I pulled the o ring out of the BMW hose. This o ring looked exactly the same size but felt like it had more play. Ebay o rings were hard. I had to push damn near as hard as I did with the other o rings but it did go on. Added new clip, filled up with coolant and so far so good. After seeing the other manufacture hoses with the same connection, I don't think this is some special part. These connectors, o rings and clips seem common.
We'll see how it goes when it gets colder.
We'll see how it goes when it gets colder.
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Koolponycar (01-22-2018)
01-21-2018, 05:52 PM
#460
Senior Member
Just a update. I have a small leak on the thermostat side 31mm O ring today, And thats the side i had a very hard time installing because you have to push so hard back on the T and then slide it over the metal thermostat housing. Maybe i pinched it or got it in a bind. Bobo.mo didn't have any leaks, anyone else? I have the extra 4.5 x 31 mm O rings so I could try that or try another 31 x 4mm? What do you all think? I wonder if ford removes the whole Thermostat housing, replacing that gasket behind it and installing the whole thing at one time?
Last edited by Koolponycar; 01-21-2018 at 10:10 PM.