EGR cooler ???

[01whitey24]

I work for the public works dept and we got 2012 1 ton dump in the summer. It has 4100 on it and just had to have an EGR cooler put on it. It does idle a lot. It has something like 400 and some engine hrs on it and half on them are idle hrs. Sounds like this will keep happening. They told me to drive it harder to clean it out. So my question is would the delete be a better option? Hard thing would be talking my boss into doing it.

[mpichner]

Not a hundred percent sure on this but if you do the egr delete im thinking you would have to delete the dpf as well , seeing that the egr system aids in raising exhaust temps for regens????

[BIG Laing]

Originally Posted by mpichner

Not a hundred percent sure on this but if you do the egr delete im thinking you would have to delete the dpf as well , seeing that the egr system aids in raising exhaust temps for regens????

Fail all over ^^^. You can do an EGR delete (federal offense if registered for public roads) but you need a tuner ( about $1000). Most people that have already spent the money on the tuner will delete the DPF (a 2nd federal offense) also.

[mpichner]

Never said it was legal!!!!

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[BIG Laing]

Originally Posted by mpichner

Not a hundred percent sure on this but if you do the egr delete im thinking you would have to delete the dpf as well , seeing that the egr system aids in raising exhaust temps for regens????

Everything here ^^^ is wrong. Well I guess the part about you being "not sure" was right.

Originally Posted by mpichner

Never said it was legal!!!!

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I never said that you said it was legal. I was letting the OP know it is illegal.

[mpichner]

OK fine did some reading. Egr systems are designed to cool the combustion chamber to create less NoX. My findings after deleting the erg system on my 6.0 was 100-150 degree cooler egts (in the manifold) at highway speeds. Besides that can you do an egr delete without dpf delete? I've always thought the dpf needs the egr system???

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[BIG Laing]

The DPF would soot up to the limit faster without the EGR. So regens would be more frequent. They are independent of each other though. And if for some weird reason you wanted to keep one and not the other, you could.

The DPF has two types of regens active and passive. passive are triggered when EGT are 572* F and above, so an EGR could help get you to this, but that's not really a good thing in my mind. Active regens are the ones you see the msg for, when your MPG drops for 15 mins. Raw fuel is being sent down the exhaust while the EGR valve is closed.

But to get rid of either one you need a tuner. And if your going to spend $1000 (minimum, can be closer to $1500 now) there is no reason to not spend the extra $50 for an EGR plate, and $100 for the DPF delete pipe (or $400 DP back).

[brstanle]

In my opinion, it is not wise to break federal laws with a vehicle that's not your own. Especially with a publicly owned vehicle. It just seems like a very, very bad idea.

[Painted Horse]

Originally Posted by BIG Laing

The DPF would soot up to the limit faster without the EGR. So regens would be more frequent. They are independent of each other though.

I'm not sure about this. The EGR deals with NOx not Soot. The EGR reduce the combustion temperature in the combustion chamber? This has the effect of reducing the NOx that is produced at high combustion temps. This is why our trucks have a smaller EGR than previous generation engines. because it deals with the NOx in the SCR by injecting DEF to reduce the NOx.

The DPF is the component that deals with the Soot. It has a filter that collects the soot and then burns it into ash during the regen process. Each part of the emission system addresses a different pollutant. Soot vs NOx.

[BIG Laing]

Originally Posted by Painted Horse

I'm not sure about this. The EGR deals with NOx not Soot. The EGR reduce the combustion temperature in the combustion chamber? This has the effect of reducing the NOx that is produced at high combustion temps. This is why our trucks have a smaller EGR than previous generation engines. because it deals with the NOx in the SCR by injecting DEF to reduce the NOx.

The DPF is the component that deals with the Soot. It has a filter that collects the soot and then burns it into ash during the regen process. Each part of the emission system addresses a different pollutant. Soot vs NOx.

The EGR puts the soot (and all exhaust) back in the cylinders right? I thought it helps burn soot/unburned fuel...