coolant disappearing

[serv]

(03-20-2018 )snailexpress Wrote:  

(03-19-2018 )serv Wrote:  We recently had a truck losing coolant and found a coolant leaking into the exhaust in the after treatment system. I want to say it was at the def doser. It’s probably not hard to check. We found it by accident. We also found this while we were in there. No codes or check engine lights.

This is not a coolant. This is DEF drying before decomposition tube what they call "volcano"
Coolant will be brown/reddish in color.
Cummins has procedure for cleaning. If DPF/SCR soaked with coolant it need to replaced or mr Haggai is savior.

Thanks for the info. I wasn’t trying to say the white buildup was coolant. Maybe you misunderstood me? We just found that while in there in addition to a coolant leak. We actually found the def buildup while prepping this truck for off-road trim a couple of weeks ago. Runs much better now. Dpf and scr are modified now.