Emission equipment

[jordan572]

My dad plans on buying a 6.7 but since def freezes around 12 degrees he is concerned. Obviously the tank isnt going to explode but how long will it take for it to thaw out? That would be a burden if you fire it up and try to go only to be in limb mode because the def is frozen. Also a cat on a diesel is considered a dpf correct? And this truck still has an egr right? To much stupid ****

[Austin G]

No a cat is not a DPF.

Diesel Exhaust Fluid is subject to freezing at the lowest temperatures. For example, Diesel Exhaust Fluid (made up of a 32.5% urea solution) may freeze at temperatures at or below 12° F. Although this temperature is encountered in colder climates during the winter season, it has not proven to be a problem for SCR-equipped trucks. Freezing does not impact its functionality and Diesel Exhaust Fluid is easily thawed within moments by the warmth of the engine.

Some automotive-grade urea producers are working on non-freezing additives and technologies. In the meantime, equipment systems are being developed and will be used to ensure that Diesel Exhaust Fluid thaws quickly. In fact, the EPA sees no problem in allowing it to reheat in the morning using the warmth of the engine when the truck is started.

While freezing may be touted as one of the bigger concerns with SCR technology, there have been no problems with freezing based on winter reliability and growth tests across Canada and North America. Furthermore, freezing has not been an issue among Northern European fleets in countries like Norway.

[jordan572]

So does the 6.7 have a cat and a dpf? After reading about the urea system and stuff it says that the urea is injected in mixing with the nox then all of it runs through a cat where separation occurs and ammonia and water come out the other side. Does this then run through a dpf?

[Dietoremain]

the system is quite the mess if you ask me, i say DELETE DELETE DELETE and enjoy a real diesel

[matty21]

Originally Posted by jordan572

So does the 6.7 have a cat and a dpf? After reading about the urea system and stuff it says that the urea is injected in mixing with the nox then all of it runs through a cat where separation occurs and ammonia and water come out the other side. Does this then run through a dpf?

they have it all, cat dpf def muffler , all of it. but no it wont freeze theres a tank heater

[mrock]

In my area we get to -30 periodically during the winter. I have never had any problem with the DEF freezing in my 2011 F350. I plug in the truck at night, but not all of the time. The new 6.7's handle the cold much better than my 2002 7.3 did. I would not remove the emmissions stuff unless you want to risk voiding the warranty on a very expensive engine.

[AlbertaStroker]

DEF tank has 4 heaters and it also has 4 line heaters. Don't worry about the cold.

[jordan572]

Ok cool. Will the def tank still heat up when the truck isn't plugged in? If it sat to long in the cold heating the tank i would think the batteries would die. Usually my dad doesn't plug it in because 95% of the time it is in a heated garage.

[Austin G]

Originally Posted by jordan572

Ok cool. Will the def tank still heat up when the truck isn't plugged in? If it sat to long in the cold heating the tank i would think the batteries would die. Usually my dad doesn't plug it in because 95% of the time it is in a heated garage.

it won't heat if the truck isn't running.

[jordan572]

Originally Posted by Austin G

it won't heat if the truck isn't running.

Ok then back to my main question. How long does the truck have to sit and run before the urea tank thaws enough to provide full power? Just to clarify, the urea tank heats while it is running and plugged in?