DEF going away ?

[ptsg]

This was the state of the intake manifold on our 2016 SUV after only 87,000 miles, thanks to the good ol'EGR. No codes yet, just preventative maintenance. The cylinder head wasn't any better as you can imagine.

Before:

After:

Surely, making an engine eating it's own cr@p can't do it any good?

This vehicle also adds extra fuel on the exhaust stroke when doing an active regen, which happens to be every 150 miles, more or less. This is done to increase the temps of the DPF.

Of course, when it regens and I happen to be doing city driving, a lot of that fuel will end up washing down the cylinder walls and contaminate the oil.

I've pretty much cut the service intervals from 12,000 miles to about 7,000 miles, so I'm not running that contaminated oil for so long. I've also had to send the DPF for cleaning at only 56,000 miles. Turned out to a close to $1000 ordeal.

Not only the emissions equipment is not reliable, it also trashes the reliability of the engines. All of that while using more fuel.

I'm just glad my 2010 pickup was about the last one on the assembly line to come out without a DPF. Just a small and so far, trouble free catalytic converter. I've had to replace the EGR cooler though. Imagine that.

 

[Snobdds]

Lol. I appreciate the anecdotal pieces of evidence.

Was just trying to share the perception from the engineering side...

The engines are all robust, at this point. The Cummins X15 hasn't changed much in years - It does just fine loping along at 1200rpm low load, indefinitely. The challenge comes when you need to integrate a comprehensive exhaust aftertreatment system onto it.

For what its worth, I feel like I am noticing a pattern with Paccar and DPF/DEF/SCR issues. The aftertreatment system isn't always engineered or integrated by the engine manufacturer (which is dumb).

You are the first person in the diesel world to tell me lugging an engine is fine.

What?

 

[Shawn T. W.]

No reason to bash the aftertreatment system that is keeping our air clean

This is my solution to clean air ... I moved from my townhouse on a golf course in Arizona, to the country in Missouri ... Clean fresh air, lots of it!

"The solution to pollution is dilution!"

My point is we as a county have done so much already (too much!) to try to clean up the air, and yes in the cities there is less smog, but until the rest of the world even tries to catch up, we are peeing in the ocean to try to get the tide higher! India and China, are you listening?

And @Snobdds the part ...

It does just fine loping along at 1200rpm low load

That's pulling 75,000 - 80,000 Lbs ... ! Low load???? That engine is STRUGGLING!

 

[Hay Dude]

My 2007 International HT570 only has cooled EGR and it was a mess, too. Most people only think of DEF/DPF.

IMO, and the opinions of many other farmers & truckers I know, only the engineers and the salespeople from the DEF/DPF producers think they’re “great”.
Most all us farmers & truckers think it’s JUNK.