HPOP when changing the oil? - Ford Powerstroke Diesel Forum
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Old 09-10-2013, 06:19 AM
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Question HPOP when changing the oil?

I have a 1995 F350 and I'm going to change the oil myself this time. I usually have a mechanic do it but I don't know of any here where I'm at. Just wondering if I should remove the top plug that screws into the HPOP so the oil in it will drain also? I read someplace that the oil in the HPOP doesn't drain very good when changing the oil and the person that wrote the artical built a pump to pump out the oil in it a quart at a time. He would pump out a quart and replace it with new oil. then run the motor for about 10 minutes and do it all over again. He would do this three times putting three quarts of fresh oil in it each time. Seems like a lot of work to me. Thanks
Tim
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Old 09-10-2013, 06:24 AM
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It's retarded, that oil cycles in the lpop and back in the pan with the rest of the oil, if you did it 10 times you still would have only replaced fresh oil with fresh oil, don't waist your time, drain the pan, full it back up, enjoy the 2 hours you didn't spend waisting time on hpop oil change
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Old 09-10-2013, 06:44 AM
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All I do is suck out the quart or so out of the top. Drain the pan as usual. Fill the top and the pan. Done
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Old 09-10-2013, 07:23 AM
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^^^^^ This. Takes two minutes, not two hours. Note - the purpose of this is NOT to improve the performance or longevity of the HPOP specifically. As said, the HPOP gets fresh oil circulated into it every time you run the engine. The only purpose this serves is to get one more quart of old dirty oil out during the oil change. Nothing's gonna blow up if you don't do it, but leaving it in there is like, if you were changing the oil on an old-school diesel engine, pouring one quart of old oil in along with the 12-14 quarts of new oil.
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Old 09-10-2013, 07:55 AM
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Seems to me if you just keep your intervals normal that 1 or so quart is pointless, and I meant to hours in the design of the thing to do the job and crank 3-4 times to keep doing that
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Old 09-10-2013, 08:30 AM
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Agreed, that quart-at-a-time thing is . As to whether it's worth the extra coupla minutes to get that extra quart out, that's a to-each-his-own thing. Pan takes so d@mn long to drain, I figure why not, just an excuse to open another beer....
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Old 09-10-2013, 08:47 AM
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Beer makes me lazy, that's why my turbo has been off for a month lol
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Old 09-10-2013, 09:24 AM
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thanks a lot for the info on the oil change. I won't be doing the HPOP but, if I took the plug out of the top of it will that make kind of a vent to make the pan drain faster? Just wondering.
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Old 09-10-2013, 09:27 AM
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No, there's a check valve in the pump/reservoir, so the oil in the HPOP res stays there unless you draw it out through the top as said. Removing the fill cap on the passenger-side valve cover might drain the pan faster. I always do, but I've never actually compared/checked, that would be too geeky....
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Old 09-10-2013, 10:37 AM
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In the end the CCV is always open to the elements....
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