oil change on hpop
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Mountain Pass
Joined: Jul 2011
Posts: 224
Likes: 1
From: Taylorsville, KY
oil change on hpop
ok, I'm stuck inside due to some recent shoulder surgery and have been watching anything an everything on YouTube about 7.3's or diesels in general. I've been on this forum many times but have never ran across anything that discussed what the Powerstrokehelp guy had to say about injector care. States the oil in the hpop or top end of the motor does not circulate as in other areas of the engine. Therefore, he says the oil needs to be sucked out of the hpop and replaced. recommends doing this in 3 increments at a quart removed and replaced each time with 5 minutes run time between. Any thoughts?
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Ignore anyone that insists you need to change the HPOP oil. The oil in that reservoir comes directly from the oil pan and cycles fairly quick. NOTHING good comes from sucking out the HPOP oil but many bad things can (and have) happened. It's not worth messing with so just stick to the regular oil change intervals and you should be fine. I change my oil every 8-10k miles. 
Elder User
Joined: Aug 2015
Posts: 535
Likes: 3
I think what he must have meant was that in order to do a complete oil change you have to drain the HPOP reservoir as well since it holds a volume of oil. He couldn't of meant it didn't circulate, cause how did it get there then?? He meant it doesn't drain back to the pan, but it does circulate.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
I think what he must have meant was that in order to do a complete oil change you have to drain the HPOP reservoir as well since it holds a volume of oil. He couldn't of meant it didn't circulate, cause how did it get there then?? He meant it doesn't drain back to the pan, but it does circulate.
It's really a waste of time to suck out what little of the HPOP oil that you can get with a suction tube. It's like tossing a hand full of sand on a camp fire in hopes it will extinguish the flame. The risk/reward ratio is prohibitive so it's best to leave the HPOP alone when performing an oil change.
Hotshot
Joined: Dec 2012
Posts: 11,271
Likes: 1,654
From: Las Cruces New Mexico
I did this often on the fleet, kept the oil clean even at 4k but after a while it started to get old and i just stoped doing all together. On my obs I do it once every 3 oil changes to keep the oil nice and clean
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
Don't waste your time. If you have bad injectors some guys suck it out and put in there type of snake oil to help them out. All oil goes back into the pan at some point. This oil changes fairly quickly and bends back in with the rest. Like said above there is much more oil in other places that don't get changed out either.
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
ok, I'm stuck inside due to some recent shoulder surgery and have been watching anything an everything on YouTube about 7.3's or diesels in general. I've been on this forum many times but have never ran across anything that discussed what the Powerstrokehelp guy had to say about injector care. States the oil in the hpop or top end of the motor does not circulate as in other areas of the engine. Therefore, he says the oil needs to be sucked out of the hpop and replaced. recommends doing this in 3 increments at a quart removed and replaced each time with 5 minutes run time between. Any thoughts?
Like every one else said, not necessary to change it. Now, if you have a way to suck out the pint or so, then feel free to do it. But his reasoning is so far off reality it ain't funny.
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Fleet Mechanic
Joined: Nov 2008
Posts: 1,573
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From: Seattle
Besides being unnecessary, a big downside is possibly damaging that HPOP reservoir plug. That plug isn't meant to be removed and replaced regularly and if you mess it up, you're in for way more work than you set out to do. Plus, you increase the chances of dropping foreign material into it.
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Elder User
Joined: Aug 2015
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I think the original poster did not write what actually was said. Or the guy in the video explained it terribly, as I did above. What I think he is saying is. If you want to do a COMPLETE oil change you have to change the oil in the pan, hpop reservoir, and rails. To do this you drain the reservoir (Pan empty), fill reservoir with new oil, crank 5 times to pump it into rails and push old oil out into empty pan so dirty oil is not pumped into engine killing the plan. Then repeat 2 more times to get new oil all the way threw. So the Only failure in his explanation is you only drain the reservoir once, and just fill it 3 times, and the pan must be empty. So the theory is solid, just a waste of time if you ask me. In fact, the best way to change the tranny fluid is with a very similar procedure.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
If you have any doubt about how well oil circulates through your HPOP reservoir, remove the plug on the top of the reservoir and crank the engine.
You might have some clean up to do, but all doubts will be removed about weather enough oil flows through the reservoir to provide enough circulation.
You might have some clean up to do, but all doubts will be removed about weather enough oil flows through the reservoir to provide enough circulation.
Lead Driver
Joined: Jun 2004
Posts: 6,342
Likes: 588
From: Amarillo, TEXAS!
I think the original poster did not write what actually was said. Or the guy in the video explained it terribly, as I did above. What I think he is saying is. If you want to do a COMPLETE oil change you have to change the oil in the pan, hpop reservoir, and rails. To do this you drain the reservoir (Pan empty), fill reservoir with new oil, crank 5 times to pump it into rails and push old oil out into empty pan so dirty oil is not pumped into engine killing the plan. Then repeat 2 more times to get new oil all the way threw. So the Only failure in his explanation is you only drain the reservoir once, and just fill it 3 times, and the pan must be empty. So the theory is solid, just a waste of time if you ask me. In fact, the best way to change the tranny fluid is with a very similar procedure.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
I think the original poster did not write what actually was said. Or the guy in the video explained it terribly, as I did above. What I think he is saying is. If you want to do a COMPLETE oil change you have to change the oil in the pan, hpop reservoir, and rails. To do this you drain the reservoir (Pan empty), fill reservoir with new oil, crank 5 times to pump it into rails and push old oil out into empty pan so dirty oil is not pumped into engine killing the plan. Then repeat 2 more times to get new oil all the way threw. So the Only failure in his explanation is you only drain the reservoir once, and just fill it 3 times, and the pan must be empty. So the theory is solid, just a waste of time if you ask me. In fact, the best way to change the tranny fluid is with a very similar procedure.