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Discussion Starter · #1 ·
Hi

I have just stupidly topped up my def tank with diesel instead.

What do folks recommend I do next?

Thanking you in anticipation.
 

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I'd like to know how this happened as no diesel nozzle will fit into the DEF fill hole. At least, not in the US. I doubt in the UK, either. I smell a troll. You'd have to take deliberate steps to put diesel into the DEF tank, this is why the DEF fill port is much smaller than the diesel fill port and why DEF nozzles are so much smaller than diesel nozzles.
 

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Agree, seems like a troll post, a fuel nozzle won't fit in the DEF fill. It is much easier to absent mindedly put DEF into the fuel tank, which creates a massive headache. That has actually been done :LOL:
 

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Discussion Starter · #6 ·
Agree, seems like a troll post, a fuel nozzle won't fit in the DEF fill. It is much easier to absent mindedly put DEF into the fuel tank, which creates a massive headache. That has actually been done :LOL:
With fuel shortages locally I had stored some diesel into empty def canisters, and my son unfortunately mistook it, and topped the def up.

I am going to try and syphon it out.

Does anybody know if def and diesel are in the same container whether they mix or keep separate, like oil and water, and if so which would be on the bottom?

So story your troll detection antenna is wrong with me.


Thanking you in anticipation.
 

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With fuel shortages locally I had stored some diesel into empty def canisters, and my son unfortunately mistook it, and topped the def up.

I am going to try and syphon it out.

Does anybody know if def and diesel are in the same container whether they mix or keep separate, like oil and water, and if so which would be on the bottom?

So story your troll detection antenna is wrong with me.


Thanking you in anticipation.
I don't think you'll be able to siphon directly. There is a screen on the top of the DEF inlet on the top of the tank.
 

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Also, I would be extremely careful about using the DEF containers for diesel because the high pressure fuel pump is extremely picky. If there is any remnants of the DEF in the container it could damage your fuel system.
 

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Also, I would be extremely careful about using the DEF containers for diesel because the high pressure fuel pump is extremely picky. If there is any remnants of the DEF in the container if could damage your fuel system.
Indeed, DEF is highly corrosive so any getting into the fuel system is bad news. If the OP wants to store fuel at home then they need proper containers.

OP, you'll have to drop the DEF tank and drain it by hand. That's the only way to get it all out.
 

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With fuel shortages locally I had stored some diesel into empty def canisters, and my son unfortunately mistook it, and topped the def up.

I am going to try and syphon it out.

Does anybody know if def and diesel are in the same container whether they mix or keep separate, like oil and water, and if so which would be on the bottom?

So story your troll detection antenna is wrong with me.


Thanking you in anticipation.
Thanks for clarifying. Sh%t happens I guess!

As others said, you can't siphon the fuel directly out of the tank via the filler as there is a screen blocking access. I did drain my DEF once as it was stale, because the tune I had at the time had DEF turned off. To do that, you have to remove the filler hose from the tank under the truck and use a hand pump to suck the contents of the tank out. I would not be satisfied with that though, as there will still be a small amount of diesel in there no matter how hard you try.

Unfortunately, I think the only way to properly deal with this to avoid emissions system hassles is to remove the DEF tank completely so you can empty and clean it out. Everything about modern diesel fuel and emissions systems is sensitive, any contamination spells issues. Removing the DEF tank is not the worst job in the world, but it is a bit of a pain. I rate it a 5/10 on Duke's logarithmic PITA scale. For instsance, a "6" is 1.5 times as bad as a "5" and a "10", well, you might as well just total the vehicle. :LOL:

Then you have to get rid of the diesel/DEF mix, a nasty concoction. Lots of wrong ways to do that, not sure where one could take it to do it the right way.
 

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Thanks for clarifying. Sh%t happens I guess!

As others said, you can't siphon the fuel directly out of the tank via the filler as there is a screen blocking access. I did drain my DEF once as it was stale, because the tune I had at the time had DEF turned off. To do that, you have to remove the filler hose from the tank under the truck and use a hand pump to suck the contents of the tank out. I would not be satisfied with that though, as there will still be a small amount of diesel in there no matter how hard you try.

Unfortunately, I think the only way to properly deal with this to avoid emissions system hassles is to remove the DEF tank completely so you can empty and clean it out. Everything about modern diesel fuel and emissions systems is sensitive, any contamination spells issues. Removing the DEF tank is not the worst job in the world, but it is a bit of a pain. I rate it a 5/10 on Duke's logarithmic PITA scale. For instsance, a "6" is 1.5 times as bad as a "5" and a "10", well, you might as well just total the vehicle. :LOL:

Then you have to get rid of the diesel/DEF mix, a nasty concoction. Lots of wrong ways to do that, not sure where one could take it to do it the right way.
Any autoparts store would let you dump it in the oil bin out back. Or if you have a fire ant problem there is your insecticide apply liberally.
 

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Any autoparts store would let you dump it in the oil bin out back. Or if you have a fire ant problem there is your insecticide apply liberally.
One time I had used oil mixed with ATF, brought it in, the girl behind the counter actually took the cap off and sniffed the container and rejected it. Took it to Walmart, they will take anything :LOL: For my future reference,I plan to dispose of ATF separately.
 
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