HPOP Rear Plate O-ring Leak - Ford Powerstroke Diesel Forum
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Old 11-30-2010, 05:24 PM
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Cool HPOP Rear Plate O-ring Leak

Like it says....I got a nice leak coming from the rear plate of the HPOP on my E99 7.3.

I have 230K miles on my relatively stock motor (Cortex tuner and UMP intake), so I'm wondering if a simple O-ring replacement is in order, or if there's a good reason to remove and reseal the entire HPOP at this time.

Is this a project I should try to accomplish without removing the HPOP...or is HPOP removal the most painless way to make the repair?

Is there any other work I should consider on the HPOP at this time?

Any tricks, tips, pictures, or warnings you have for this project will be appreciated.

Thanks in advance.

Rob
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Old 11-30-2010, 05:45 PM
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I am not much help since I have yet to pull my hpop and service or change it out, but if I were you I would go ahead and pull it and completely overhaul it with all new orings and such.
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Old 11-30-2010, 06:59 PM
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and if its reasonable and you can find one you can upgrade to a 17* hpop.... way better than your lil 15*.
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Old 11-30-2010, 09:54 PM
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Quote:
Originally Posted by Dietoremain View Post
and if its reasonable and you can find one you can upgrade to a 17* hpop.... way better than your lil 15*.
What exactly will that do for my relatively stock setup?

I have a spare 7.3 out of another 99 with 175K and some damage in the bottom end, but I'm thinking about taking the HPOP from that engine and resealing it to replace my leaker. Not sure which HPOP the spare engine has-15 or 17?
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Old 11-30-2010, 10:30 PM
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e99's with a build date of 12-99 and before have a 15* hpop, late 99's on have a 17*, the split shot injectors in the super duty's use more oil, Ford realized this after our e99's were built. so even a stock truck will do better with the later/larger pump.
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Old 11-30-2010, 10:44 PM
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Quote:
Originally Posted by countryraised View Post
e99's with a build date of 12-99 and before have a 15* hpop, late 99's on have a 17*, the split shot injectors in the super duty's use more oil, Ford realized this after our e99's were built. so even a stock truck will do better with the later/larger pump.


Thanks for the straight-forward reply!

Hopefully the HPOP in the spare is a 17...how will I know which is which...part numbers, appearance?
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