IPR O-Rings - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 3 (permalink) Old 10-02-2019, 04:28 PM Thread Starter
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IPR O-Rings

Howdy all,

Had the IPR o rings from the previous owner and figured I'd throw them on. Ran into a bit of a snag, has anyone else had trouble with the IPR split-square style ring not fitting tightly on the IPR after getting it on? I installed it and it seems ok. 8.5-8.9% duty cycle at idle with about ~475PSI +-20 PSI and at WOT in between 2400-2500. I'm not sure how these external o-rings would affect performance, but any insight is appreciated.

1997 California AB injectors

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post #2 of 3 (permalink) Old 10-02-2019, 05:42 PM
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Re: IPR O-Rings

That's just the way the split ring is. It is there to support the actual o-ring in sealing. A bad o-ring will allow oil to bypass, especially when warm (hot oil is less viscous than cold oil) and therefore not allow sufficient pressure to build. Cheers!

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post #3 of 3 (permalink) Old 10-09-2019, 06:54 PM Thread Starter
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Re: IPR O-Rings

Great Patrick thank you for the post. So from what I have seen these numbers are within spitting distance of spec, especially considering the age of the parts involved.
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