6.7 vs 6.4 Regen/DPF Cleaning process? - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 04-05-2013, 04:40 PM Thread Starter
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6.7 vs 6.4 Regen/DPF Cleaning process?

What differs between the 2 in the Regen process i am curious.. Because what i am getting at here is the 6.7 left factory stock is a dependable truck, No need for a DPF delete.. and the 6.4 left stock can be a nightmare, stemming from constant regen/making oil.. DPF delete only solution. How was the regen process improved in the 6.7?

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post #2 of 13 Old 04-05-2013, 05:18 PM
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uses 1 side to inject fuel and is able to do a passive regen if worked hard enough. I think egr is smaller amount because use def so not as big problem
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post #3 of 13 Old 04-05-2013, 05:38 PM
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The 6.7 uses urea/DEF fluid versus the 6.4 that uses diesel as the catalyst to superheat the soot in the DPF filter. There's no extra diesel used in the regen on a 6.7. Making oil in a 6.4 happens if you don't let the regen cycle complete or idle in park prior to shutting the engine off.

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post #4 of 13 Old 04-05-2013, 06:27 PM
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The 6.7 and 6.4 both regen the same way. They both inject diesel on the exhaust stroke. The 6.4's oil gets diluted with diesel during the process, I don't think the 6.7 does this, at least mine didn't. The urea is to reduce NOx and has nothing to do with the dpf or regens. I do think the 6.7 is more reliable stock than a 6.4, but they both benefit from deletes.


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post #5 of 13 Old 04-05-2013, 06:34 PM
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Originally Posted by Alberta Advantage View Post
The 6.7 uses urea/DEF fluid versus the 6.4 that uses diesel as the catalyst to superheat the soot in the DPF filter. There's no extra diesel used in the regen on a 6.7. Making oil in a 6.4 happens if you don't let the regen cycle complete or idle in park prior to shutting the engine off.
They both use diesel for regens. The 6.7 uses urea for its SCR (selective catalyst reduction?), therefore the 6.7 has a much smaller EGR since the DEF is taking care of part of the emissions crap.

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post #6 of 13 Old 04-05-2013, 07:27 PM
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how does the dodge system work we have quite a few 12s at work so just kinda curious of how they work since they do not require dpf

]2011 f250 king ranch cc/sb fx4 black and tan allot of inferior parts fell off so i put better ones on . 5inch exhaust axle dump s7b intake . blistien 5100s all the around . 20x12s on 305,55,20s .leveling kit with bags in the rear .5% tint all the way around
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post #7 of 13 Old 04-05-2013, 07:35 PM
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Originally Posted by lhood6.7 View Post
how does the dodge system work we have quite a few 12s at work so just kinda curious of how they work since they do not require dpf
Dodges got DPF since 2007.5, thats why the good old 5.9 went away.

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post #8 of 13 Old 04-05-2013, 07:36 PM
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And in 13 I believe they added the DEF/SCR system.
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post #9 of 13 Old 04-05-2013, 07:45 PM
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i thought they didnt my bad i dont use them i use my personal truck for work .im not old enough for there commercial insurance lol

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post #10 of 13 Old 04-06-2013, 08:58 PM
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One of the reason, is that the 6.7L is built of CGI instead of the tradition cast iron . With CGI they have better tolerances, which reduced the blow by that occurred on the 6.4L engines. Tighter tolerances, less blow by = less chance of diluting the oil. Couple that with only injecting the fuel for regen in 4 cyclinders instead of 8 cylinders and they have had much less problems with oil dilution.

Add in the smaller EGR and better technology on the regen process and it is working much better and giving us better fuel mileage.

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