DPF delete question

[johnmyster]

I think in general the whole system is a pain. DPF or SCR/DEF. And since they have to change the system as a whole the generalization is warranted.

No. Individual parts, individually replaceable, function individually to perform unique aftertreatment roles.

You have a 2024. Here are two diagrams I dug up via search. Item 11 is DPF. Notice the flanges for easy removal. Item 20 is the SCR (where the DEF goes). Has a flange and a slip joint. Also individually removeable. Modular system.



Or maybe this ram diagram. Items 7 and 13. Still modular.

I have heard there are some shops that actually can make these serviceable/cleanable with flanges that allow easy removal. There is one in east Texas that does this. I plan on visiting them after my warranties run out to do this as a preventative measure.

I wouldn't pay them much to add flanges that already exist.

Here is a good question. If these are serviceable items, then why is it so hard to find a replacement part. Last time I looked there are no OEM parts suppliers that carry any if these emission items.

Because they are model/chassis specific. The days of a universal 2.5" glass pack are behind us. Don't confuse expensive with not available. Spares abound on local classifieds.

But again, let's just remove everything we don't understand, flanges or otherwise.

 

[Trash Panda]

Finding a tuner who does good work & will stand behind it is the main problem.

That, and the 6 grand just to make troublesome parts fall off the truck.

 

[Brutal_HO]

Will be interesting to see how the new EPA rule changes situations like this. New rule https://www.epa.gov/newsreleases/io...zeldin-announces-diesel-exhaust-fluid-def-fix at least allows you to be able to drive safely without being stuck on the road. We can only hope that the rule expands to include the "useful life" of the system whereby once a system fails the dealership/Stellantis is able to remove the functionality altogether.

That's for "DEF related faults." There's nothing in that bill/rule that changes anything for DPF.

Words matter and this constant conflation of DEF/DPF, whether by mistake, ignorance, or misunderstanding, is super annoying and derails almost every conversation about it.

 

[johnmyster]

That's for "DEF related faults." There's nothing in that bill/rule that changes anything for DPF.

Words matter and this constant conflation of DEF/DPF, whether by mistake, ignorance, or misunderstanding, is super annoying and derails almost every conversation about it.

Obviously you can't go 4000 miles on a DPF that is clogged, but I'm sure there are some sensor/regen faults that could be tolerated without throwing the truck into limp mode. If we are forced to live with those systems, I'm hopeful that the same mentality of loosening the things that can be loosened in the name of equipment reliability can be extended to other systems - DPF, EGR, etc. I'm optimistic that the announcements related to DEF/SCR systems are just the beginning.

 

[Brutal_HO]

Obviously you can't go 4000 miles on a DPF that is clogged, but I'm sure there are some sensor/regen faults that could be tolerated without throwing the truck into limp mode. If we are forced to live with those systems, I'm hopeful that the same mentality of loosening the things that can be loosened in the name of equipment reliability can be extended to other systems - DPF, EGR, etc. I'm optimistic that the announcements related to DEF/SCR systems are just the beginning.

Agree. The problem is, unless it's put into legislation, the next admin could just unwind the whole thing.

 

[johnmyster]

Agree. The problem is, unless it's put into legislation, the next admin could just unwind the whole thing.

Except we're trying to get to a point where administrative agencies don't make laws. That's the whole point.

 

[Trash Panda]

Except we're trying to get to a point where administrative agencies don't make laws. That's the whole point.

Government only grows, it never shrinks.

 

[Brutal_HO]

Except we're trying to get to a point where administrative agencies don't make laws. That's the whole point.

Right, and the SCOTUS ruling on Chevron deference goes a long way towards that end, but also opens the EPA and other agencies up to "easier" litigation and long court battles. OTOH, the ruling on limiting circuit court national injunctions does alter the ability to class action suits and requiring participants to have standing (as I understand all of it.)

While we might get some relief for a few years, it's still going to come down to the party in control pulling the strings.