That is a nightmare indeed. Hopefully the dealership won't try any shortcuts as you will need a complete fuel system. This paragraph is from Texas Diesel Service:
If the technician had not started the truck the fix is pretty simple, drop the tank, clean out the def and replace the pump/filter unit. Sounds like a big problem was made bigger. Keep us informed of your progress and I am hoping for the best for you.
- I started and ran my truck for a good period of time (more than 1 minute of driving or idling) with DEF fluid in the tank. In this case, it is very likely you’re going to have DEF contamination in the fuel system. Although your truck may still be running it won’t last long. At some point, the DEF fluid will begin to crystalize and create clumps in your lines, injectors, CP4 pump, Fuel filters ETC. In this case, you can try replacing just what Is broken but it isn’t going to fix your problem in the long run. By not replacing the entire fuel system at the same time you’re going to cause yourself more downtime, money, and headache. At Texas Diesel, we refuse to replace individual fuel system components which have been contaminated by DEF, water, or other debris. The only way to fix this problem effectively is by replacing the entire system at once.
If the technician had not started the truck the fix is pretty simple, drop the tank, clean out the def and replace the pump/filter unit. Sounds like a big problem was made bigger. Keep us informed of your progress and I am hoping for the best for you.