EGR service delayed?

[RDThompson]

I just ran across a weird one. An elderly friend has a 08' 3500 SRW which he uses to pull a large RV type trailer on a goose neck hitch.
He is no longer able to perform his own service and won't go to a dealer even at gunpoint. I discovered while working on the truck that he had never had the EGR cooler service performed. He keeps meticulous records and has every receipt since new.
I found no evidence that the service had ever been performed. The weird part is that when I performed the service both the EGR valve and the cooler were squeaky clean. I can't find an explanation for this. At 108,000 miles I would have thought I'd find the cooler jammed with carbon and the EGR valve inoperable.
My question is, what are the supposed consequences of failing to perform the afore mentioned service? Are we all being hosed by Dodge, or is this just a fluke?
Please remember in replying that this is not my truck, and I have no control over what gets serviced.

 

[Cummins12V98]

He probably works the engine all the time.

 

[DonFitzwater]

I suspect cummins12v98 is right on the money. When these trucks are worked as intended, things last as designed.

 

[RDThompson]

This is the second truck that I have performed the service on that did not actually need it. Granted my own truck had the cooler replaced while still under warranty. My truck had more soot in it than this one. I was just wondering what Cummins or Dodge thought would happen if the service wasn't performed.
It is true that when he runs his truck it works hard. He doesn't drive it much unloaded or around town, and that may be the key. My own truck carries around 1500 to 2000 lbs. in the bed most of the time and I do more city driving than he does.

Bob T.

 

[Cummins12V98]

I suspect cummins12v98 is right on the money. When these trucks are worked as intended, things last as designed.

Something I can back up is my fuel dilution on two separate Blackstone oil tests was less than 1/2 of one percent. This is from towing and no grocery getting.

 

[xcc_rider]

The supposed consequences are a plugged cooler/loss of egr flow or loss of egr gas cooling and accompanying engine performance problems. Also a fouled egr valve could stick, closed- would duplicate above loss of flow, open- would douche intake, engine, turbo and dpf with soot causing the obvious problems associated with excessive egr recycle flow rate. Most notably turbo sooting and plugged dpf. I did the latter.

 

[RDThompson]

Thanks for the reply. I suspected it might be as you stated. This is the third truck I've seen with minimal soot build up in the cooler. As the others have suggested it is probably more to do with how the truck is used than a specific mileage. I would still perform the service on any truck as it is not excessively onerous and could have consequences if ignored. I hope mine is just as clean a 135,000 miles when my next clean out is due.

 

[bigblock_doc]

I've got 107,000 and not cleaned mine yet. Driven with load 95% of the time.....