Working these engines is not the answer. More power usually means more carbon. Getting rid of the DPF/EGR/ other crap is the answer.
The problem is these systems suck. All the testing they did was in a controlled enviroment. That means they used a certain fuel, certain temps certain weights, certain driving techniques, etc. To come up with their reliabilty and longivity tests. Trust me they tried many different variables before using their ideal ones.
The real world where guys drive their trucks regulary every day, shut the thing off turn it on multiple times a day, stop and go traffic, hook a trailer on on, hook it off. Seems to be outside of the engineers test parameters.
I have a friend who hauls SuperBs he has 5 trucks, two of them are new Kenworths, he is haveing the same problem with his big trucks, they carbon up turbos and egr system. They spend almost as much time in the shop as they do on the road. His trucks are worked hard and never shut down. Yet he is told his trucks are abused thats why they are carboning up. Operating outside of their intended use. KW spec'd the trucks themselves.
Two out if his 5 are new KW, 2 are FL's and one a WS. His three older trucks all have DT60s in them, simple reason DPF delete and milage has gone up and his problems with carboned up turbos is non existant.
So short sweet of it, get rid of the DPF/EGF/emmissions equipment.
If your truck has this problem multiple times then get ahold of CAMVAP file a complaint and hopefully they can help.
Any of the vehicle manufacturers will try what ever they can to get out of fixing their equipment. Especially if it is a reocurring problem. Even though thousands of others have no issues, they will always put the blame on the one person who does, and not on their equipment.
Good luck and pursue this matter further.
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