Small oil leak around HPOP-Where?
 

The leak drains into the first valley of the block. This is after a cleaning and about 300 miles driving:
http://i72.photobucket.com/albums/i1...psfyopwael.jpg

I thought it may be the IPR but, it's looking pretty dry:
http://i72.photobucket.com/albums/i1...pscdmbsmqe.jpg

Some more pics:
http://i72.photobucket.com/albums/i1...psoikfykde.jpg
http://i72.photobucket.com/albums/i1...ps0rscvaqp.jpg

The HPOP line fittings are dry too. Where else do there the HPOP's tend to dribble a leak of oil from?

Make sure it's not a fuel leak on top of hpop. I couldn't find my hpop leak either so I removed it and replaced all orings and gasket. Fixed issue.

The other none serviceable port? The small one near the bottom on the two high press line side. Hard to see. Don't take it out unless your taking the hpop out to do it. It has a tiny check ball it holds in, and you will lose it. The check ball goes in a hole, then the bolt in question passes in front of it holding it in. The O ring on the bolt is probably gone. Starts small, but blasts out later on. Lol

I recently rebuilt the fuel bowl so it should be good. It's oil in the valley at any rate.

I was wondering the same OR could it be the gasket?

The Hpop gasket? That's not likely but possible. Are both bolts tight? The none serviceable one I'm referring too is usually the O ring at the top. But to change it you have to drop the ball so to speek. Mine kept backing out and blowing the O ring, so I used lock tite as well when I re assembled the bolt.

200 Miles and that little oil? I'm sure it will show itself soon enough. In addition to the fittings and lines on the HPOP, there are also three other additional places a leak can form. Those being in order of occurrence:

Not yet replaced (upgraded) Line Fittings.

The Rear Plug

The Non-Serviceable Plug

The Pressure Diaphragm O-Ring


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https://cimg4.ibsrv.net/gimg/www.for...9f08762056.jpg

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Thanks Thomas. I can rule out definitively the rear most plug, the large O ring behind the snap ring, and the HPOP fittings as the plug and O ring are clearly visible and not leaking. I changed the HPOP fittings recently with the CNC fabrication HPOP line kit and can see those are not leaking as well.

I'm guessing that it's the non-serviceable plug. If I snake my hand under the HPOP as far as I can, I do find oil wetness but since my hand is shoved in there, have no idea what I'm touching. Additionally, in that general area is some oily sludge, not a lot but some.

The oil shown is after 300 miles following a thorough rinse with Simple Green and a garden hose.

If it is the non-serviceable plug, is it truly an HPOP replacement and not the longer plug that is offered? Or, is this more of a temporary fix?

High Pressure Oil Pump (HPOP) Replacement "non-serviceable" plug on the 7.3 Ford Diesel Oil Pump

They call it non-serviceable only because the HOOP requires removal for service. Ford and our sponsors both sell the o-ring kit. On a F-450 it's "servicable". All symantics.

I was just about to mention that it IS serviceable with pump out. Ya beat me to it. Use lock tight. It will back out if you don't. I think that plug or bolt is only meant to be threaded once. It doesn't seem to hold the second time, so I loc tite it. Stays in now.

I went to International and bought a replacement plug that has more threads for a better hold. Riffraff now sells this one:

Serviceable Long Threaded HPOP Plug for Ford 7.3L (94-03)