EGR Diffuser Tube Cleaning; 3rd Gen EcoDiesel

[NMH_94]

Here are some before and after pics of the EGR diffuser tube when it was taken to the shop for a cleaning. 32k miles, mixed highway/city driving (average between 26-27 MPGs per tank), Hot Shots EDT every fill up, and Hot Shots Diesel Extreme every 6k miles. When I did research into buying one of these, I saw a ton of concerns with how much soot the 2nd Gen engines pumped into the intake. The engineer of the 3rd Gen said they added a low pressure EGR system to help reduce soot formation, and I've also read that using fuel additives with a good cetane booster can help reduce soot as well. Just looking at these pictures, it's hard to know how much the low pressure system and my fuel additive routine helped reduce soot, but it looks like the soot formation is "okay"/acceptable given my driving habits. Curious to get opinions from folks more knowledgeable than myself.

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[GladiatorPilot23]

The catch can will really help the oil is the problem. Also, a fuel born catalyst can be beneficial. I’ve heard after I finish my redline fuel catalyst I want to try https://betterdiesel.com/shop/

 

[Rusty PW]

That's pretty clean compared to what I've seen on other diesels.

 

[kb5zcr]

I have a 23 with 9000 miles on it. Just from watching my soot load on my scanguage, I have a hunch that the egr pulls pre-dpf exhaust until the engine is warmed up, then it pulls post-dpf exhaust once up to operating temp.
This is only a guess, if someone had a way of looking at the programming they might be able to figure it out.
I need to crawl under it, I'd like to actually see where the post-dpf is pulled from.

Either way, that looks a lot better than other photos I've seen.

 

[kilroy173]

Excuse my ignorance by how do I get to this part to inspect it? This is my first diesel and still learning new stuff all the time.

 

[Firehawkcpo]

The catch can will really help the oil is the problem. Also, a fuel born catalyst can be beneficial. I’ve heard after I finish my redline fuel catalyst I want to try https://betterdiesel.com

@GP23-GDid you have a chance to use the betterdiesel additive?

 

[NMH_94]

Excuse my ignorance by how do I get to this part to inspect it? This is my first diesel and still learning new stuff all the time.

I want to know the same thing. There are a lot of youtube videos for the 2nd gen ecodiesel, but the layout of the 3rd gen is different and I wasn't able to figure it out on my own, which is why I brought it into the shop to get this cleaning done

 

[NMH_94]

The catch can will really help the oil is the problem. Also, a fuel born catalyst can be beneficial. I’ve heard after I finish my redline fuel catalyst I want to try https://betterdiesel.com/shop/

I switched to Archoil because it has a fuel born catalyst. My regens have decreased pretty substantially since I made the switch.

 

[GladiatorPilot23]

I didn't but now after doing more research I don't want to anymore. These fuel born catalysts are made with metallic additives many use Iron based FBC such as Archoil 6500 or Better FBC. While they do burn off soot faster and lower the temp to burn soot, the iron over time will build the ash in the DPF. If cleaning was easy then no big deal like with the big rigs and industrial applications where the DPF just clamps off right off and you have it pro cleaned.

 

[NMH_94]

I did didn't but now after doing more research I don't want to anymore. These fuel born catalysts are made with metallic additives many use Iron based FBC such as Archoil 6500 or Better FBC. While they do burn off soot faster and lower the temp to burn soot, the iron over time will build the ash in the DPF. If cleaning was easy then no big deal like with the big rigs and industrial applications where the DPF just clamps off right off and you have it pro cleaned.

I've thought about that same concern, as it does appear likely that Archoil's fuel borne catalyst is ferrocene or a similar metallic compound. If that's true, then it seems using Archoil involves a potential trade off. That is, it will result in less soot recirculating through the EGR system and intake manifold/engine, but may increase ash buildup in the DPF and thus require more frequent replacement of the DPF. I'm going to reach out to them to see if they have a response to this. Either way, I think I'm willing to take that tradeoff, as higher soot load in the engine intake concerns me more than potentially higher DPF replacement intervals

 

[Sbro2021]

Had mine out too to clean it. Intake looks about the same. Gonna pull it off at 100k( in about a month) and clean that all out and replace all of the gaskets.

 

[GladiatorPilot23]

I've thought about that same concern, as it does appear likely that Archoil's fuel borne catalyst is ferrocene or a similar metallic compound. If that's true, then it seems using Archoil involves a potential trade off. That is, it will result in less soot recirculating through the EGR system and intake manifold/engine, but may increase ash buildup in the DPF and thus require more frequent replacement of the DPF. I'm going to reach out to them to see if they have a response to this. Either way, I think I'm willing to take that tradeoff, as higher soot load in the engine intake concerns me more than potentially higher DPF replacement intervals

Yes you got it! One thing is if your willing to pull the DPF, I can be cleaned of ash with the real good companies out there. One option is to keep a spare and send one out and have it ready in case.

For EGR and intake the #1 cause it gets clogged is not from soot but from evaporated oil. You need a catch can and not just any can. The best one is the Mann/Hummel Provent. There is no real kit but Im going to make it work once I get around to it. The next HUGE thing that will keep everything clean and like new it a water/methanol injection. This is a game changer and does many great things. You can even do just water if you like deionized. I got the bigboi deionizer the triple filter wall mount for washing but also can use for injection and can add the meth to it or buy in bottles. I'm going to install soon the snow performance 2.5 kit using the windshield reservoir. Ill start a thread on it once I do it and test it for a while.

 

[GladiatorPilot23]

Had mine out too to clean it. Intake looks about the same. Gonna pull it off at 100k( in about a month) and clean that all out and replace all of the gaskets.

Yea the oil is gumming it up. Need a Provent catch can and water/meth and it will look NEW throughout.

 

[NMH_94]

Had mine out too to clean it. Intake looks about the same. Gonna pull it off at 100k( in about a month) and clean that all out and replace all of the gaskets.

Nice. Got a few questions for you. How many miles when you pulled this off? Do you run a fuel additive? Did you pull it off yourself? If so, I'd love to know how you did it. I had trouble figuring it out on my own

 

[Sbro2021]

Nice. Got a few questions for you. How many miles when you pulled this off? Do you run a fuel additive? Did you pull it off yourself? If so, I'd love to know how you did it. I had trouble figuring it out on my own

To try to answer your questions:
Pulled that tube at around 80K. Do not run fuel additives regularly. Ran some extreme diesel for about 8 tanks of fuel after that, have not checked it since. As far as getting it off, it just takes removal of the heat shield upstream on the tube and a wobbly on a socket for the two screws and some gentle love, persuasion and some encouragement that the jeep will be ok and out it came. If you do attempt it, I will say( and can't stress enough) do not over torque those two screws!!! I initially wanted to see if the intake was melted as I have seen and heard instances of that with the plastic intake and the temp issue the eco has. When I was seeing 1500deg. at the turbo last year, was concerned the intake plenum might be taking the brunt of that heat. The temps out of the egr during those pulls was also higher than it should be.

And to Gladpilot23's point on water/meth, I agree with you. Would clean it up for sure. Ran those systems on pre def trucks I had owned the past. I have not done enough research to see if anyone has run it on an eco diesel, to what success, and what cost if any to the after treatment system. That shit is so expensive and I'm 3500 miles from being out of warranty for good. If anyone has data on running water meth on the eco I'd love to hear about it.

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