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Mystery O-ring

 
  #1  
Old 01-21-2019, 07:32 PM
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Mystery O-ring

So there I was, minding my own business, changing out the stand pipes and dummy plugs on the truck in my signature. I had to pull the oil rail on the driver side to get at & remove the lower part of the old standpipe. As I put the oil rail back on, I noticed a mysterious o-ring laying in the valley between the HPOP cover and the oil cooler housing (the turbo and pedestal are out) that appeared out of thin air. In the attached picture, I've placed a dime next to the o-ring for scale. For the life of me, I can't figure out where the hell this tiny o-ring came from. It's looks like it's tan in color.

Any one recognize it and know where it is supposed to be? Many Thanks ~ Kurt
 
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Old 01-21-2019, 09:34 PM
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Check your stand pipes
 
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Old 01-21-2019, 09:56 PM
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Originally Posted by Nixoninc View Post
So there I was, minding my own business, changing out the stand pipes and dummy plugs on the truck in my signature. I had to pull the oil rail on the driver side to get at & remove the lower part of the old standpipe. As I put the oil rail back on, I noticed a mysterious o-ring laying in the valley between the HPOP cover and the oil cooler housing (the turbo and pedestal are out) that appeared out of thin air. In the attached picture, I've placed a dime next to the o-ring for scale. For the life of me, I can't figure out where the hell this tiny o-ring came from. It's looks like it's tan in color.

Any one recognize it and know where it is supposed to be? Many Thanks ~ Kurt
Is it like the tan o'ring from the blue spring fuel pressure upgrade kit? I can't think of a tan o-ring coming from anything at the turbo area.
 
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Old 01-21-2019, 11:03 PM
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ICP sensor seal?
 
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Old 01-21-2019, 11:19 PM
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Originally Posted by willydmax View Post
Is it like the tan o'ring from the blue spring fuel pressure upgrade kit? I can't think of a tan o-ring coming from anything at the turbo area.
That pic doesn't look real brown but this ^^ makes the most sense if it is.

 
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Old 01-22-2019, 05:29 AM
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Is it true round or has a flat back side sort of like a " D " ?
 
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Old 01-22-2019, 08:44 AM
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Originally Posted by Yahiko View Post
Is it true round or has a flat back side sort of like a " D " ?
Like an injector top seal?
 
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Old 01-22-2019, 02:57 PM
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Originally Posted by SmackDaddy View Post

Like an injector top seal?
No I was still thinking D-ring. (Stand pipe/Dummy plug)
An air test would also be a quick way to test.
 
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Old 01-22-2019, 03:01 PM
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Originally Posted by Yahiko View Post
No I was still thinking D-ring. (Stand pipe/Dummy plug)
An air test would also be a quick way to test.
Yessir that’s what I was referring to in the first reply. I hate when I have mystery parts especially after the job is “done”.
 
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Old 01-22-2019, 04:19 PM
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I don't think most know just how flat the D-rings are on the inside. They are also very stiff and if
you ever remove one and put a new on on you need to give it an hour to shrink back after being
stretched to work it in place. Same thing goes with the little Teflon seals in the power steering system.
They need time to relax back to the un-stretched sizing.

In looking at a dime I don't think it's a D-ring or an injector top seal. So that brings us back to the
Blue Spring Kit or an O-ring from the EOT Sensor or Oil Pressure Switch.
 
  #11  
Old 01-22-2019, 08:31 PM
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I believe it is an o-ring from the fuel filter housing now that I have read all the comments and seen a picture of the blue spring kit.. I had to remove the intake manifold so I could remove the passenger side bolts on the HPOP cover, so it could've fell out when I disconnected the fuel lines from the fuel filter housing. I'll go check it out as soon as I complete a couple of "honey-do's" for the wife.
 
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Old 01-27-2019, 11:08 AM
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Epilogue - That o-ring was from the fuel line that goes to the driver side head, where it connects to the secondary fuel filter housing.

Thank you for all your help!
 
 


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