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2011+ Engine Related Questions Sub-Forum to the new engines that debuted in 2011.

5.0 - Coolant Disappearing???

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Old Feb 4, 2020 | 09:29 AM
  #21  
Ronnie Marcum's Avatar
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Originally Posted by antony1103
I first tried to replace the o-ring with a non-factory Buna-N o-ring that I had lying around, since I thought it would make a better seal. It leaked like a sieve and I just replaced the whole connector. That was about 2 years ago and its leaking again. I'm just replacing the whole thing with bulk tubing and a clamped y-connector this time for a permanent seal. It'll take a bit longer and be a bit more expensive like I said in my last post, but I'm fed up with this leak...
I bought the Motorcraft replacement O-ring which is more Square than round from the factory I guess part number: RTS1073. I plan on replacing tomorrow and I'll see how that goes first.
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Old Feb 17, 2020 | 08:13 PM
  #22  
UpNorthRedneck's Avatar
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I replaced all the Orings about 6 months ago after the leak began. I used a basic kit from AutoZone. It has been six months with no issues or leaks. I recommend doing a coolant flush when you do this.
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