Forum Discussion
Grit_dog
Sep 14, 2022Navigator II
SweetLou wrote:
What about the blue def in the tank? My tank is 1/2 full. I know that it could freeze but I think 1/2 a tank would be enough for expansion. I could open the cap just in case but should I be concerned?
Don’t leave it open to air.
No freezing issue either. What do you think happens where it gets cold? They freeze every time the truck isn’t running for x number of hours or days. And thaw out once the truck is running and the tank heater turns on.
Fwiw, the Dodges will only overflow from freezing if filled up literally 100% full up into the filler neck.
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