Great video! If we think of this pump as just a simple hydraulic pump, which it is, that seal shouldn't leak with around 100psi of shop air, let alone 500psi of oil which is the minimum needed for the HPOP system to fire the injectors on this engine. Good Job sir!
To anyone else that may refer to this video on their fix, the pump is supposed to leak a little around the shaft. Not saying this pump wasn't bad internally, but there's other ways to test the pump in the same manner. But I give props to "Barnyard" for being innovative and fixing his own truck. There's only one way to figure this stuff out, and that's exactly how to do it 👍
Hey did you happen to notice if yours leaked out the back side? where the c-Clip holds the plate on? I have the same issue and did exactly what you did but mine is blowing some oil out the back. Is this normal? Doesn't seem right to me.
@@timbowles6 correction its not a dump valve it's a swash seal. the dump valve is located on the bottom of the pump with a allen insert to remove it from the pump.
Everyone that said it supposed to leakoil out the shaft seal is full of it the pressure reliefe returns the oil into the return line . There should be no external oil leaks on this pump. 50 Year turning wrenches .😊
Very ingenious and simple testing. However, when you see that old style aluminum pump, that's pretty much how you know you need a pump. They were extremely failure prone. If I were replacing one, I would upgrade to the new style pump which takes a different cover.
I tested mine in this fashion today and had oil coming out of the shaft. Injectors done recently, ipr is good, icp is new, replaced dummy plugs and standpipes with new style w/Teflon . Guess I’m gonna order one, sure hoped it wasn’t that, but seems to be the case. Good video, man! I hope this is my problem.gonna be a grand with core on the stupid thing, but gotta get it going.
Dieselsite rep told me their pumps arent sealed and you can't use air to test it. They said you need to follow the Ford manual for 6.0 and use blocking plates and manual hydraulic pressurize. I had the same idea when I had air blowing out the front seal and into the oil cooler area. She said they flow test the pumps and they can run them at 5K psi all day.
Dieselsite rep, whoever that is, didn't know what they were talking about. That leaking at the main seal is not acceptable. I had one like this and the truck still ran, but could only generate about 2000 PSI. The engine needs about 3800PSI at WOT so the engine would stumble at about half throttle. I had just replaced the HPOP, due to a no start hot situation, so I assumed the new HPOP was good, since it made my truck run. Chased my tail forever going through the turbo, injectors, fuel system, EGR, exhaust, etc. until I found this leak was causing the stumble. GRRRRRRRR
this is absolute true , talked with a friend that builds the pumps at dieselsite and the front shaft seal is designed to leak an that air should not be used to test the pump because it isn't designed to be completey sealed. if it produces pressure it is fine.
Just so everyone knows that pump uses a swash seal and it does not fully seal unless it’s spinning under engine rpm if you put pressure on it, you should see a couple drops of oil come out not a full blown leak like that that one was definitely bad. It’s a good way for a do it yourself test but just don’t freak out if it’s seeps a little bit.
@@Flipflopbarnyard Did that fix it? I've got a 30psi icp reading and no start. My pump leaks the same but I was just told by guys that that leak is normal?
Yes did one yesterday and it came out front seal of pump almost put I back together after finding a small leak in line fittings. To my surprise I pulled the pump to double check and found pump leaking only got between 200 to 575psi cranking. It was demanding 1400psi always check front seal on high pressure pump 😉
So I pulled out my HPOP today and did the exact same test as in the video, I have a very tiny amount of air coming out from the same area but not near as much as this guy did in the video, I was told by one mechanic that a tiny bit of blow-by is normal in that area What do you think?
Just wanted to point out. That hole where the compressed air was applied is the oil pick-up side of the pump and would never see anything over about 75 PSI. supplied by the main engine oil pump. These are two stage pumps with check valves etc. The high pressure side should never be able to leak backwards to the low pressure side. As an internal pump they are designed to leak a little out of the front shaft for oil on gear etc. at 75 PSI.
I agree putting air on the pressure side is the way it should be done but when I did that with mine it leaked really bad out the front seal and it was a reconditioned pump right from O'Reilly's had a hot no start. It's impossible to pressure test the system leaking that bad. I won't buy another reconditioned pump they are junk.
No I had the same problem with a reconditioned pump right from O'Reilly's you can't pressure test the system with that kind of a leak I had to get another new more expensive pump before the problem got solved and caused me a lot of grief chasing my tail looking for leak elsewhere and couldn't find any it's not worth messing with a reconditioned pump
That does not determine a bas pump, ive seen several that leak a little bit from the seal and they are perfectly fine, i believe they are designed to leak a little from the seal. U pour a little bit of oil, cover bottom hole with finger, turn it by hand and it should suck on your finger.
I bought a reconditioned pump that was doing that from day one was told it was normal to leak some but it would be impossible to do a leak test and it didn't seem normal to me so I purchased a new pump and it doesn't do that however I still have a hot no start condition I've been scratching my head with forever. The seals look pretty good in the j-tube but it's possible oil could be bypassing because it seems they're pretty flat
6.0 pumps aren't sealed. you need to follow Ford RAPS and testing the pressure produced by the pump. I applaud you for fixing your own pump but some air would certainly leak out the shaft because some oil is meant to leak. I'm not saying that your pump is good but this is not a definitive way to see if it is bad. Just for some perspective did you happen to do the same test with the new pump?
Did you hear the leak in the valve cover area? I replaced my standpipes/dummy plugs. Orings on injectors tips and nipple cups on oil rail. Still hearing a leak . Just curious if you heard it leaking up in the oil rail area? That's where I'm still hearing my leak. Thank you
Did the fix work for you? I've done new o-rings on all injectors, new o-rings & nipples on fuel rail, new ICP, & IPR and still no start hot. So I'm thinking HP oil pump too. Did it work after you replaced the pump?
Thanks for the video I have the same issue with mine... so many people that don't know what they're talking about say it supposed to leak out the seal. I've been chasing my tail forever with this problem I replaced absolutely everything and have no leaks anywhere except that seal. This was a reconditioned pump from the local auto parts store. These pumps are junk reconditioned or not.
I have a leak in hpop. Cold start all day. Not a complete not hot start but sometimes it is. No trouble codes. Runs perfectly fine while running. It's either my stand pipes and plugs or hpop . I'm confused guys
Did you pressurize your system with air? If it’s leaking you’ll be able to hear it blowing and gurgling. I pressure tested the hpop and oil rails with stand pipes separately. That how I came up with the idea of how to test the hpop alone.
Pressurizing with air is crucial, I think. If you have a leak preventing start up, you should hear it. Im replacing an HPOP tomorrow.. working on a 2005 6.0 & it has no air leaks, & a new IPR valve. Only seeing a slow build to 15 lbs pressure at ICP while cranking, FICM is fine.
@@Flipflopbarnyard have the same truck wouldn't start hpop was only putting out 450psi, I pulled the pump replaced the o rings but I didn't have the tool to take the j tube off and replace that o ring. Well now the truck starts and runs while cold won't restart when hot I'm thinking leak
I've replaced everything on mine and have no leaks anywhere in the high-pressure oil system other than that shaft leak...but it has a hot no start so what else could it be? You can't pressure test when it's leaking that bad. Aren't they supposed to hold pressure when air is added to the ICP port?
