7.3L Powerstroke Oil Leaks: High Pressure Pump Fitting Repair 

Great video. Still learning my 7.3 and this probably saved me $500+ since it wasn't the rear main and I ended up tackling it myself. Keep up the good work.

Thank YOU! This is my project today. I feel a whole lot more confident about what I am doing, thanks to your video.

My 2000 7.3L Diesel gave me nothing but love for 19.5 years; now, however, I seem to have a fuel fountain somewhere below the waste gate controller/air intake manifold. Anyway my point is simply that I appreciate videos like this and I may wish to see more in the future.

I made this repair following your instructions. THANK YOU! I was really surprised that both old fittings and the plug were not much more than finger tight. When I began to loosen the plug, I had to look to make sure the socket was still on the plug as there was zero resistance. No wonder the o-rings blew out. Thanks again for your fine instruction! We are very grateful!!!

You are the answer to my prayers. Thank you

I keep coming back to your videos, you to a fantastic job of breaking things down so it is easy to see and understand, thank-you!!!

This video saved my ass. Broke down on a road trip from Washington to California, got about half way and blew an oring. Got lucky and broke down next to a ford dealer and a China freight tools. My tools were 400 miles away so I tried to buy a little garbage tools as I had too. Ended up using a body clip tool for the high pressure oil line quick disconnects. Worked like a charm. Lost 4 hours of drive time but got it all patched up. Cost about $200 in Parts, tools and oil but sure beats a tow bill, hotel and paying the stealership. This all happened on a Saturday too so I couldn’t even toss cash at the mechanics to borrow some tools

not the first video ive seen of yours but bought my first diesel today, 7.3 turbo f550 limo bus and when i finally got home i noticed a decent pool of oil when left idling, will have to really dig in tomorrow and find the culprit. like many others my first thought was, "oh shit its the rear main." seems to be from above the starter. all your videos have been super helpful, thanks!!!!

I think I found the perfect how-to repair video... bravo

Got the same leak in our truck time to change the seals. Great video not a hard job to do follow the instructions and watch your well produced video.....

Thanks for the video. I opted for the door trim tool instead of the specific OTC tool at twice the price. Worked great!

Just a note to let people know that even though the bag in the video for part number F81Z-9C402-AA says "One pkg of 2 pcs", dealers only sell them each, and they are any where from $25 to $55 EACH. Be sure you are getting two when you order. Rock Auto has them, and their order system won't even let you order one, it also doubles the price when you put it in your cart.

Dude your videos are of the highest quality coverage straight knowledge transfer to the masses!!

Great video. Thank you. Just discovered today that this is the exact issue I’m having. I can see oil coming from both those lines while truck is running. Thanks again.

Excellent video on the HPOP repair thank you!!

Great how-to. Can you either post a reply or short video on how you safely wash the engine bay of a 7.3 prior to this procedure? I am weary of using a pressure washer if any deals are compromised. Is there a degreaser and procedure you recommend?

Gonna check it and clean everything real good to see where exactly it's coming from... Thanks for the reply and good video.. I learned something I didn't know about!! Thanks again !

when i had a high pressure leak, i ended up having 2 small leaks, one was the quick connect fitting on the driverside oil rail. the second leak was the rear drain plug on the pump. i replaced the oil rail fitting with a newer style fitting, that has 2 external o rings, along with the internal o ring. one on the threads and second was on the outside where you pop the hose back on. the rear plug leak was simple, but what i had found was interesting. i think someone else replaced the o ring at one time. because not only was the o ring bad, but the plug was not even really that tight. the o ring looked like something they could pick up from a tractor supply. it was just a small brown o ring. much smaller then what the factory o ring was. and part of the o ring was started to peel away, wasnt dry rotted or cracked or even brittle, just a outer layer of the o ring has started to peel off. there were also no signs of lock tite used. i ended up getting the proper kits and replacing everything myself with lock tite as well. very quick and easy job. just messy. but also im prepared for any more leaks as i bought the kit to reseal everything on the pump, (i just dread when the time comes to pull the whole pump) although now i noticed i have oil leaking again. very small amounts. so i need to find that leak, i hope its not my repair thats doing it. although i also hope its not the turbo pedestal o rings.

Is there a torque spec for the fittings in the heads. I have a line on the passenger side that's got a weeping leak. Awesome video by the much appreciated

Excellent presentation!!

Question - I can't seem to get my lines back on. I've tried everything. And for the removal tool I made one myself took maybe a hour to do. I really am very grateful for your video. Good job let's talk line reinstallation please lol

Just what I needed. I have a popped line but this shows how to clearly remove the lines..... Looks like I'm buying a couple more tools.

Incredibly good video. Excellent video detail. Thanks a lot, save me lots of time!

Just wanted to give a big thank you for you're video and links to the parts.... My 7.3L is back to running like a scolding ass ape!

So I have the oil running down from the valley & leaking out of the cover plate to the transmission/torque converter area. How can I tell if my leak is either rear HPOP plug O ring or the 2 HPOP Lines fittings - or if its from the Turbo Pedestal base seals? I don't want to start in on the Turbo Pedestal base if its just the Hpop plug or lines fittings that are leaking! It started out, I found a leak in my heater core with green coolant coming out the air conditioner condenser drain barb thru the firewall. Rather than spring the quoted $1500 for a new heater core replacement job, I just took both heater hoses off their heater core barbs at the firewall and joined the 2 together with some hose clamps and a brass double ended hose barbs piece so the coolant bypasses the heater core for now so I can drive then damn thing for a while. After that was done I let it idle for about 10 minutes max to come up to temp and make double sure there's no more coolant leaks, which was all good. Checked underneath just to be sure theres no coolant puddles from anywhere else and all good. Except now I notice a large pool of oil on the garage floor from bell housing inspection plate area. Turned truck off and jacked it all up at the front on jack stands. Got in underneath and couldn't see where the actual leak was - seemed to be coming down past the starter motor up above. Climbed in under the hood to see oil pooled in the valley - now realize its draining down the back of the bell housing & dripping out the bell housing inspection plate area..so likely either HPOP rear Plug O Ring or the HPOP 2 lines ORings - or worst case scenario - base of the turbo pedestal. How do I tell which it is please? Vehicle is Brazil built RH drive F 250 2004 model (the Brazil built 2004 still have the same US 2003 7.3 Powerstroke T444E Navistar engine in them) Superduty 4wd 4 door. So it is 13 years old this year BUT has only just done 160,000kms; or 100,000 miles since new. Could it be anything else obvious that I have missed? I cant see how bypassing the heater core by joining the 2 heater hoses could have caused a huge oil leak after 10 min idle. It wasn't leaking oil when I drove it into the shed to work on the heater core hose bypass dammit, it just started after I completed the heater core bypass and got that all sealed up nicely while letting it idle to make sure there were no more coolant leaks. The only thing had to do to get at the heater core hose barbs and clamps at the firewall was remove the air filter box cover and black plastic inlet pipe to the turbo - which I replaced just same way as it came off. Is it just coincidence that it decided to leak oil after fixing the heater core leak issue? If it was raining pussies today I'd get hit by a butt hole!. TIA for any sage advice.

You're awesome Brian. Thanks for the videos.

man you are awesome for this video man and thanks for the links for the tools.

Ok stupid question time... does one have to make sure the lines go back exactly as they came off? Meaning there is an in and out and it has to be that way? What happens if one were to mix them up? This is for future reference. My issue at present is the drain plug is leaking huge, It just runs down the valley after a min or two of running. I will check the hp connectors when I rum it up to temp and check my work on the drain plug. It could be that those fittings leak as well after it gets warm I'll find out.

Thanks for that I was wondering why all the sudden started leaking down the backside of my bell housing and why I have oil up under my hood so I'm guessing my must just went out because it was never like that when I bought the truck recently in mine only has 287,000 mile

Great video. Very well detailed. Mine has 179k on it and has a leak in the valley. I will do this repair first. What I can't tell from your video is how many things you removed. Your camera was in a great location and you had room the get at the fittings. Did you remove the fuel filter housing?

Where have you found best to source the F81Z-9C402-AA fittings?

Thank you sir. my 99 7.3. dumped oil to day.the lines were the prob..only 107000. miles. yes thought it was rear main.

I made my own disconnect tool from a piece of flat steel. It looks suspiciously like the factory tool, but was free.

Another great video from a professional, thanks again.

Awsome, I am going to make a note of this for when I do see this problem on a 7.3, does a 6.0, or 6.4 also have a similar problem? Oh and what was the part number to the parts from ford.

Have you seen the front timing cover leak between it and the block? Below the hpop ... I’ve replaced the hpop mounting gasket 3 times now, hpop is NOT leaking, oem gasket and torqued to spec, cleaned.

Hi, I enjoy your videos... they are the bomb! Question: 2001 7.3 manual trans w/ airaid, 4 " turbo back superchips tuner 275K miles recently developed minor power loss going on midway through 3rd gear, 4th gear, 5th gear. develops about 10-12 lbs of boost then feels like it struggles a bit. replaced ipr and sensor but not cps. Any ideas?

thank you buddy! Excellent video by the way. You have earned yourself a new subscriber 👍

Awesome dude great video. Next time I’ll do more research before throwing parts at my truck!!

Thank you for the video my 2000 ford f350 has the same problem but really bad. Now it's time to fix it.

excellent video. Nice quality filming and well narrated. Saved me a heap of trouble. Thnx.

So do I have to do anything as far as refilling the oil in the hpop or does it fill when I turn the key or do I just reconnect the lines and wait 15 min for the loctite to dry and fire it up and just check the oil and top off?

Well after a lot of swearing and squeezing my hands in shapes they weren't meant to be in, I got this done. I wasn't able to use the Loctite because despite letting it sit overnight when I went to clean port out oil was still coming out of it so I just said screw it and put the new fitting on there and so far so good, not leaking anymore. My only concern is that it takes about a second longer to turn over when starting now, is this normal?

Hey I don't know if your gunna get back to me but I'm doing a rebuild on my hpop and am looking for where you ordered the two elbow quick disconnect fittings from for the hpop, love you videos man they've been so much help

Are the F81Z-9C402-AA fittings the same on the cylinder head end?

I put an Adrenaline pump on mine, also new fittings. it lasted about 3 months and is starting to leak. Have you ever heard of the lines going bad where they connect to the fittings? I'm not sure if it's the line or the fittings, but with the fittings being new I would think it's the lines. I just wanted to ask before I drop $330 on new lines. It's a daily driver with no pulling done with it. Thanks

I am about to do this repair and I'm a little nervous regarding having the necessary room to be able to get all my tools in there... cause for mine it seems incredibly cramped and there are a bunch of metal pipes in the way that are going to make doing this rather difficult. I see you have disconnected some, are there any of the connections/pipes going in and out of HPOP/Fuel Filter housing that I should NOT remove?

It's at the dealer having the intake manifold area torn down right know I hope thy find the problem and it's not expensive because it drives and runs good. How much is the turbo base plate leak fox usually cost ?

Excellent video. Thank you.

Omg thanks dude I just had this problem I really needed to see this video I have the same exact truck and same problem.

Thank You Young Man! You just same me some mega bucks! You are doing a great job!! Thank you!

I have a 95 / 7.3. Do you recommend taking the fuel bowl out to do this upgrade/ service?

FYI I updated the boss fittings at around 240k. one of them staring leaking again. the external oring. these are orange in color. in my case change them out put new orings on, loctite provided in kit. cleaned applied loctite torque to spec. I'll be dam if the sobs leaked again. long story short. I was able to bet the old style black orings same boss fitting no more leaks. had a seepage leak everytime after replacing with orange orings. can't explain it other than the old black ones fix it.

Ben following your excellent videos. Have 2000 7.3 but valley looks dry. Don't see a pedestal leak either but manual tranny bell cover is soaked. Told it may NOT be a main seal? Confused.

The 6.0l glow plug removal tool works PERFECTLY to remove those lines

Some other channels suggest and even insist on replacing the high pressure lines during this repair. So with over 200,000 miles why didn't you install new lines?

Red rings over the black ones or take the black rings off and then put the red rings in their place?

Great video the camera angles were awesome. Where did you get the new fillings?

Thank you Bryan

Great. Helpful video

Great Tutorial for the advanced or occasional DIY'r..........

Do you know where I would be able to install a oil pressure gauge? It's for the 7.3 powerstroke. Is there a test port? Or the plug under by the oil filter?

Hi Brian, I have a question, I’m looking at it and Ambulance has 64,000 miles on it. And I want to buy it. But I noticed it has a leak on the engine and oil leak. It’s coming from the front could that be the high pressure oil pump. After looking at your video I suspect it could be that. I want to buy it but I wanna make sure I do the right thing. With that little bit of miles it’s hard to imagine main seals to go out so early. But what you just showed in this video that the fittings maybe what’s leaking on the E4 50

Very good Video Brian, thank you. Where are you located?

I was wondering if this could be the same issue on my 6.7. Mine leaks a lot dripping allege way to the bottom and leaving a mess

My lines are missing the rubber collars, leaving just the metal ring underneath. I've tried a few different tools and can't seem to pop the lines off. Any advice on how i should proceed?

Very good video

can you tell me why i’m having to take my 2000 7.3 back a third time for high pressure oil leak in 2 months, this time after 1 week?

do you need to change fittings when leaking or just o rings and loctite just fine

Hi. I took the quick disconnect out where it goes on top of the engine. Does it work the same there to fix?

Well, stupid me lost the metal check ball that goes in the IPR. How can I get one?

If hpop is leaking, can it cause loss of power and a roaring sound when accelerating?

I was told today when I was getting my E-brake fixed (it failed state inspection) that I need to replace the "gasket" on my high pressure oil pump. This shop doesn't work on Diesels though. I'm a woman with no mechanical training, but I've been doing DIY on my old Suburban and now my F250 for years just by reading my manual, asking advice and finding video. Anyways, in doing some research, I have not found that there is a gasket to replace in HPOP, only the O-rings. Am I right?

Where did you get the fittings from? I looked on amazon. There is a big price range. The mid price one people complain the thread size is wrong. The high price one only has 2 reviews, which are good. I don't see them on major parts places.

Thank you, Brian!

My 7.3 has same problem.. But the leak is not coming from the lines... Is there another location on the pump that you think May need to be replaced? There's oil on top of the motor like the one you showed in this video.. And is dripping down between the transmission and oil pan to the floor. Small drips like rain drops. Want to do it my self... Not sure how much the ford dealer will charge.. Thanks

I have a 1995 7.3 liter that has this problem. My mechanic told me there is no Oring part for this engine and that I'd have to replace the whole pump. True or False? Do you have a part number(s) if the parts are available?

Hello thank you for your post . I just took my pump out to replace the o-rings and thought I would replace the line fittings when I ordered them I was told that I was to take the springs and poppets out . the parts supplier is well know. can you guide me on this. oil line fittings with out springs.

Very nicely done, keep them coming.

What part number was that high pressure replacement oil ring kit. I was driving my 7.3 I passed a car. All of sudden I started smelling oil. I thought it was the old truck in front of me. All of sudden I lose power engine turns off. Been sitting there now. It has 160k on it.

Hi , are this fit a 02 ford f-250 with 7.3 engine ?

Will this work on an international 4700 with the 7.3 (do they share the same hpop and fittings?)

Don't need those springs I've been told took mine out cause one broke runs fine anything I am missing?

Where did you buy the fittings for the hpop i cant seem to find them anywhere? thanks.

Videos like this is how you get subscribers.

how wide is it between the 2 teeth on your tool you used for the line removal?

Do I have to remove the passenger side valve cover to replace the high pressure oil line fitting?

Thanks 😊

Dude, you are awesome. Thank you!

Where do you get these springs I have checked all the kits and it does not show them why and where could I get them

How many shop hours due you bill for that job?

Do you loctite the drain plug?

Best video. Thanks!

I called Ford and the parts are discontinued . I looked on Ebay and the parts and tool are for sale for around 45 dollars including the tool and loctite. Carl

hi brian, these did not fit my truck. 2001 f-450, are these difference between the years?

Great video! Thanks for the help!

You are a Blessing,,

seem very knowledgeable in having oil leaking issue with my 97 7.3 turbo diesel could you possibly help me out i can send email to talk etc if easier thank you

Thank you great video really helped me

Saved me $500 for $60 worth of parts