HPOP Leak

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Mar 10, 2025 | 06:43 PM

SNIPER168308

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Tuned

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HPOP Leak

‘00 7.3 PSD.

Found the plug on the rear of the HPOP is leaking. Anyone know what size o-ring it takes or is it a flat copper washer. Not going to remove it until I can properly fix it.

Mar 10, 2025 | 06:49 PM

ESwift

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If I remember correctly it is a viton -5 oring, same size as the icp sensor or hpop line fittings to the heads. I typically also seal it with loctite 680 or permatex 64000 along woth a new oring.

Mar 10, 2025 | 06:57 PM

SNIPER168308

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Tuned

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Quote:

Originally Posted by ESwift

If I remember correctly it is a viton -5 oring, same size as the icp sensor or hpop line fittings to the heads. I typically also seal it with loctite 680 or permatex 64000 along woth a new oring.

Thank you…. wish I knew the exact o-ring dimensions, have a box of Viton’s. I’ll try to figure out the ICP sensor o-ring size

Mar 10, 2025 | 07:04 PM

ESwift

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Quote:

Originally Posted by SNIPER168308

Thank you…. wish I knew the exact o-ring dimensions, have a box of Viton’s. I’ll try to figure out the ICP sensor o-ring size

-905 may be helpful depending on how your kit lists them

Mar 10, 2025 | 07:29 PM

SNIPER168308

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Tuned

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Quote:

Originally Posted by ESwift

-905 may be helpful depending on how your kit lists them

Thanks. The o-rings I have are by actual size / dimensions. but I’ll look again

Reading about this plug on another site. Now I have some concerns. Can the plug be removed / reassembled , while on the engine, without losing parts? (a check ball was mentioned) It was even mentioned to put some heat on it first. Anything I need to know before I try to remove it?

Mar 10, 2025 | 07:38 PM

ESwift

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Quote:

Originally Posted by SNIPER168308

no issue doing it with pump on the truck, the other non-serviceable plug is the one that cannot be.

a little heat can ease removal and save threads of the aluminum housing. Then just clean it up, new oring, some sealer, and seat it in. I think the torque spec is 21-23 ft lbs, biggest thing is seat oring so fitting shoulder is flush to pump and do not go wild on tightness

Mar 10, 2025 | 08:10 PM

SNIPER168308

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Tuned

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Quote:

Originally Posted by ESwift

Thanks for the info. I just watched a video that showed the “non-serviceable” plug. Glad to know it’s not the same one I have leaking. As soon as I get an o-ring in hand, I’ll remove it and reinstall. Thanks again!