Crystallizing DEF.

[Dwhite]

I recently had to take my truck in to the shop because my DEF liquid crystallized in my tank and caused at check engine light. What do I need to do to not have me DEF liquid crystallize

 

[TC Diesel]

What Year ED?

 

[BoostN]

What Year ED?

TC!

 

[TC Diesel]

The Urea is the Cause 67% Deionized water and 33% Urea, it will happen again, Many Owners Including My self for Model Years 2013-16 on Rams are running Distilled water at less than 16%. My ED I mixed 1 Gallon of DW to every 2.5 Gallons DEF.

 

[TC Diesel]

Got it Boost. On 2016 you can run down to 10% Urea 90% Distilled water if you like.

 

[carlhenry]

I do t use Def but what do u do for -10 degrees

 

[TC Diesel]

It freeze's and Unthaws VIA In Tank heater, 67/33 Freezes at 12F. 90/10 Freezes at around 20F

 

[SignGuy]

Shoot I have no idea what I have in my truck. I just filled up at the truck stop and called it good. I hope it's ok next week as it'll be cold in Montana at 3 for the low and 18 for the high and the truck will be sitting out. I'll have my block heater and grill cover so that part will be fine.

 

[TC Diesel]

DEF Retail is ALL 67% DI and 33% Urea. Block Heater & WF for 3F , LOL. If this motor can't start at 3F not plug in......... sell. Now if you don't want to wait for it to warm up by running , Plugging in will help. I have NOT plug in any HPCR engine in My life ,MY 2003 was at Our Cabin IN West Yellow stone at -45 and it Started Right Up, in fact ,engines that have proper Battery power and starts in -0 temp is a darn good indictor its tight. My 2013 6.7 has stated at -40 not plug in.

 

[Will_CathVT]

I suggest following the manual to the letter regarding block heater and grill cover use. I've been as cold as 7 degrees in Vermont already this month and my DEF was fine. I treat my fuel to prevent gelling.