To leave def full or empty??? - Dodge Cummins Diesel Forum
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post #1 of 17 (permalink) Old 03-19-2017, 08:44 PM Thread Starter
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To leave def full or empty???

So I'm doing my deletes and I'm wondering if I should leave the def tank full or drain it incace I wana put it back to stock one day and I don't wana have problems if the def went bad or something??

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post #2 of 17 (permalink) Old 03-19-2017, 08:49 PM
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Definitely drain it.

The DEF will evaporate eventually and the tank will be full of dried up crusty white powder.
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post #3 of 17 (permalink) Old 03-19-2017, 08:50 PM Thread Starter
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Ok thanks I was wondering about that cuz when I spill some it turns crusty
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post #4 of 17 (permalink) Old 03-19-2017, 08:52 PM Thread Starter
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I ges it's probably a good idea to blow out the line from tank to exhast to?
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post #5 of 17 (permalink) Old 03-19-2017, 09:26 PM
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Rinse it with distilled water also.
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post #6 of 17 (permalink) Old 03-19-2017, 09:37 PM
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I'll probably fill mine with something so when the dot looks at the gauges it don't tip them off that I'm deleted. And they do look at the gauges often.

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post #7 of 17 (permalink) Old 03-19-2017, 09:38 PM
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I ges it's probably a good idea to blow out the line from tank to exhast to?
Quote:
Rinse it with distilled water also.
If you ever want to use it again.

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post #8 of 17 (permalink) Old 03-19-2017, 09:42 PM
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I'll probably fill mine with something so when the dot looks at the gauges it don't tip them off that I'm deleted. And they do look at the gauges often.

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I thought the tuners could set it to read full? Or anything in between?

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post #9 of 17 (permalink) Old 03-19-2017, 10:25 PM
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I thought the tuners could set it to read full? Or anything in between?
If so that would be great never heard that before. I assumed it had some sort of float that showed fuel lvl. I don't think it is a digital gage so not sure how they could set it with a tune. Definitely worth looking into.

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post #10 of 17 (permalink) Old 03-19-2017, 11:37 PM
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If so that would be great never heard that before. I assumed it had some sort of float that showed fuel lvl. I don't think it is a digital gage so not sure how they could set it with a tune. Definitely worth looking into.

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If i remember correctly one of the tuners using efi live could do it. The information was in one of the very long deleting threads. Hopefully someone else chimes in with more information on the deal. I know i would rather stare at a full gauge. There is no float sensor and it is not linear.
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post #11 of 17 (permalink) Old 03-20-2017, 08:26 AM
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Mine reads empty after tuning. I think most of them read empty after tuning. And not because the tanks empty, the tunes set it to empty
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post #12 of 17 (permalink) Old 03-20-2017, 01:25 PM
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I pulled my egr valves and cooler put the egr kit in, then went to pull exhaust. Taking the DEF Tank bracket off makes pulling exhaust easier. Ended up taking whole def system out. really wasn't that hard. of course I saved everything so I could put it back to stock if I needed, but that's just crazy talk. Poured out fluid, gave it to a friend that is running stock. Point is take the tank and the hoses out. more ground clearance less weight and more room under vehicle. After all said and done I think I lost about 220 - 250 lbs off the truck.
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