Kinda curious about this as I plan to do the delete on my 2015 TOMORROW!

 

Yeah I am going to stop by Lowe's and pick up a siphon (Arnold's I believe) for like $13 and just siphon it out. I'll probably refill with water just to wash it out.

 

I just deleted my '16 over the past weekend - wanting to know this too.
Where does the DEF feed into the stock system? I didn't see anything on the DPF that I removed. I'm assuming somewhere prior to that. I was wondering what everyone did with the whole DEF sytem - if they removed the tank/hoses, ect, or just left everything there. I guess there's no way to drain the tank other than siphoning?

Also, what did you guys do with all the un-used electrical plugs after disconnecting them? I removed 4 "egt" type sensors, and another 2 sensors that looked like O2 sensors. After disconnecting the plugs, I filled the remaining half of connectors with dielectric grease, then wrapped the hell out of them with electrical tape. Was considering dipping them in Plastidip, which could be peeled off easy in the future. Don't want the connectors corroding - one day I'll have to re-install everything for inspection purposes I'm sure.

 

Some people drain and rinse the DEF tank with water, some remove the tank, some leave it partially filled with DEF to prevent crystallization. Which ever you decide to do is fine. If you choose to leave some DEF in the tank, you'll have to drain it then fill it with fresh DEF if/when you put your DPF back on. DEF has a rather short shelf life.

 

Yard it out, that's what I did. No need for that tank anymore!

 

I’ve been looking into reusing the tank for a meth injection kit. Wondering if there’s a way to remove the lines and pump and install aftermarket pump and lines up to the engine bay for the meth injection.

 

I was thinking about doing this, but just decided to put a 7 gallon tank in my toolbox instead, just in case I have to return to stock for some reason.

 

Drained and rinsed out the tank with hose water.

 

My next project.

 

I don't suppose there is a nice, convenient drain on the bottom of the tank, like there is on the radiator? Barring that, I guess the only other way to drain the tank without removing it is to siphon?

 

303-08 Engine Emission Control 2015 F-250, 350, 450, 550 Super Duty
REMOVAL AND INSTALLATION Procedure revision date: 03/20/2014

--------------------------------------------------------------------------------

Reductant Tank
Removal

All vehicles

Drain the reductant tank. For additional information, refer to Reductant Tank Draining


in this section.
With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02.
NOTE: Inboard frame mounted reductant tank filler hose shown, outboard similar.

Detach the reductant tank filler hose cap retaining strap from the reductant tank filler hose.

NOTE: Inboard frame mounted reductant tank filler hose shown, outboard similar.

Remove the 3 reductant tank filler hose bolts.

Inboard Frame Mounted Reductant Tank

If equipped, remove the fuel tank shield. For additional information, refer to Fuel Tank and Filler Pipe — Exploded View in Section 310-01.
Using a suitable lifting and lowering tool, support the reductant tank.
Remove the reductant tank bolt.

Remove the 3 reductant tank bolts.

NOTICE: Lower the reductant tank slowly. Not following this may damage reductant system components.

NOTE: While lowering the reductant tank, make sure the reductant tank filler hose is positioned loosely between the frame rail and the body panel.

Lower the reductant tank enough to access the reductant tank filler hose connections, electrical connector and reductant pressure line.
Disconnect the reductant tank electrical connector.
Detach the connector pin-type retainer from the bracket.

Detach the reductant pressure line routing clip from the bracket.

Disconnect the 2 reductant tank filler hoses from the reductant tank.

Outboard Frame Mounted Reductant Tank

NOTE: On some chassis cab vehicles, the outboard frame mounted reductant tank can be mounted on the inboard side of the frame rail.

Disconnect the 2 reductant tank filler hoses from the reductant tank.

Disconnect the reductant tank electrical connector.
Detach the connector pin-type retainer from the frame.

All Vehicles

NOTICE: When disconnecting the reductant pressure line from the reductant pump assembly, gently press the reductant pressure line connector towards the pump assembly and hold. Then press the connector tabs and pull the connector straight off the pump assembly nipple. Failure to follow these instructions may cause damage to the reductant pump assembly and the reductant pressure line.

NOTICE: Do not use any tools when disconnecting the reductant pressure line. The use of tools may cause a deformity in the clip components which may cause reductant leaks.

NOTE: Disconnect the reductant pressure line before disconnecting the reductant pressure line heater electrical connector.

NOTE: Inboard frame mounted reductant tank pressure line shown, outboard similar.

Disconnect the reductant pressure line from the reductant pump assembly.
Gently press the reductant pressure line connector towards the reductant pump assembly and hold.
Press the reductant pressure line connector tabs and pull the reductant pressure line connector straight off the reductant pump assembly nipple.

NOTE: Make sure the reductant pressure line is disconnected from the reductant pump assembly before disconnecting the reductant pressure line heater electrical connector.

NOTE: Inboard frame mounted reductant tank pressure line shown, outboard similar.

Disconnect the reductant pressure line heater electrical connector.

Outboard Frame Mounted Reductant Tank

NOTE: On some chassis cab vehicles, the outboard frame mounted reductant tank can be mounted on the inboard side of the frame rail.

Remove the 2 reductant tank strap bolts and remove the straps.

All Vehicles

Remove the reductant tank.
Installation

All Vehicles

Position the reductant tank.
Outboard Frame Mounted Reductant Tank

NOTE: On some chassis cab vehicles, the outboard frame mounted reductant tank can be mounted on the inboard side of the frame rail.

Install the 2 reductant tank straps and 2 bolts.
Tighten to 40 Nm (30 lb-ft).

All Vehicles

NOTE: Inboard frame mounted reductant tank pressure line shown, outboard similar.

Connect the reductant pressure line heater electrical connector.

NOTE: Inboard frame mounted reductant tank pressure line shown, outboard similar.

Connect the reductant pressure line to the reductant pump assembly.

Inboard Frame Mounted Reductant Tank

Connect the 2 reductant tank filler hoses to the reductant tank.

Attach the reductant pressure line routing clip to the bracket.

Connect the reductant tank electrical connector.
Attach the connector pin-type retainer to the bracket.

Raise the reductant tank into the vehicle.
Loosely install the 3 reductant tank bolts.

Install the reductant tank bolt.
Tighten to 20 Nm (177 lb-in).

Tighten the 3 reductant tank bolts.
Tighten to 20 Nm (177 lb-in).

If equipped, install the fuel tank shield. For additional information, refer to Fuel Tank and Filler Pipe — Exploded View in Section 310-01.
All Vehicles

NOTE: Inboard frame mounted reductant tank filler hose shown, outboard similar.

Install the 3 reductant tank filler hose bolts.

NOTE: Inboard frame mounted reductant tank filler hose shown, outboard similar.

Attach the reductant tank filler hose cap retaining strap to the reductant tank filler hose.

Outboard Frame Mounted Reductant Tank

Connect the reductant tank electrical connector.
Attach the connector pin-type retainer to the frame.

Connect the 2 reductant tank filler hoses to the reductant tank.

All Vehicles

NOTICE: Always refill the reductant tank with new reductant to avoid reductant system contamination.

Fill the reductant tank.


Copyright © 2016 Ford Motor Company


--------------------------------------------------------------------------------

 

from ford workshop manual

303-08 Engine Emission Control 2015 F-250, 350, 450, 550 Super Duty
GENERAL PROCEDURES Procedure revision date: 04/23/2014

--------------------------------------------------------------------------------

Reductant Tank Draining
All Vehicles

NOTICE: Discard the drained reductant. Always refill the reductant tank with new Reductant to avoid reductant system contamination.

NOTICE: The Reductant can corrode some metals. Reductant must be stored and transported carefully. Reductant must be disposed of according to local regulations.

Remove the reductant tank filler hose cap.
Inboard Frame Mounted Reductant Tank

NOTE: The reductant tank can also be drained through the reductant tank filler hose opening in the tank. The reductant tank may need to be lowered to gain access to the reductant tank filler hose opening.

Using a suitable, clean and free of contamination hose, insert the hose into the reductant tank filler hose until it stops inside the reductant tank.

Outboard Frame Mounted Reductant Tank

NOTE: On some chassis cab vehicles, the outboard frame mounted reductant tank can be mounted on the inboard side of the frame rail.

NOTE: The outboard frame mounted reductant tank may need to be partially lowered to gain access to the reductant tank filler hose opening.

Disconnect the reductant tank filler hose from the reductant tank.

Using a suitable, clean and free of contamination hose, insert the hose into the reductant tank filler hose tank opening.

All Vehicles

NOTICE: Discard the drained reductant. Always refill the reductant tank with new reductant to avoid reductant system contamination.

Using a compatible fluid transfer pump or siphon, drain as much of the reductant as possible from the reductant tank into a suitable container. Always discard the reductant to avoid reductant system contamination.


Copyright © 2016 Ford Motor Company


--------------------------------------------------------------------------------

 

thanks Max

 

Thanks brother

 

anything you need out of the ford dealer tech website i can help. workshop manual, wiring, ect.

 

What are you guys using to siphon the def out?

 

There is an anti-leak valve on top of the tank where the refill hose connects. A long screwdriver will hold that open when you turn the tank upside down.

 

How about without tanking the tank off?

 

Chiming in late here but I would siphon the tank after you delete if you live in cold regions. I made the rookie mistake two years ago after I delete and didn't drain the tank. What was left in the tank did crystallize. I learned this the hard way after reading another post way back when but it was to late. Poured in hot water, siphon, more hot water, siphon, repeat several times before all said and done.
I'm not to sure if any damage is done to the tank itself if any but freezing every night just doesn't sound good and I didn't want to know what happens after 1 year when DEF does start breaking down.

Here is my note from the old post. I saved it in my notes --
A 32.5% solution of DEF will begin to crystallize and freeze at 12 deg F (-11 deg C). At 32.5%, both the urea and water will freeze at the same rate, ensuring that as it thaws, the fluid does not become diluted, or over concentrated. The freezing and unthawing of DEF will not cause degradation of the product. DEF if stored between 10 and 90 deg F, has a shelf life of one year.