anyone know anything about adblue?

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V8-Ninety

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Started an mechanic apprenticeship couple of weeks ago... we get trucks in all the time with adblue contaminating the diesel each time the tank has to be drained or the ecu spits its dummy and the boss allows us to take the drained diesel another guy in the place has a 300 tdi and has been running this stuff for a year no issues mines 300 tdi just wondering if anyone knows an problems to look out for when running it or any potential harm
 
Urea or carbamide is an organic compound with the chemical formula CO(NH2)2. The molecule has two —NH2 groups joined by a carbonyl (C=O) functional group.

It is a colorless, odorless solid, highly soluble in water and practically non-toxic (LD50 is 15 g/kg for rat). Dissolved in water, it is neither acidic nor alkaline

so depending on concentration , you could let it sit and seperate, decant it off, and then if you have good sedimentor , and tandem filters with a water warning on the first , shouldn't be too much of a risk. JMHO
 
Adblue goes in its own tank on vehicles that use it- definitely don't add it directly into diesel! It's mostly water with urea dissolved in it. It's basically injected into the exhaust in metered amounts to clean up the emissions- essentially it's a bodge to enable engines to meet modern legislation. There's no reason to use it in a tdi and the cost of conversion would be enormous.
 
FlyingPete said:
Adblue goes in its own tank on vehicles that use it- definitely don't add it directly into diesel! It's mostly water with urea dissolved in it. It's basically injected into the exhaust in metered amounts to clean up the emissions- essentially it's a bodge to enable engines to meet modern legislation. There's no reason to use it in a tdi and the cost of conversion would be enormous.
Click to expand...

re read the thread , its contaminated fuel usability he asked about :)
 
I'd steer clear of it. It'll track through and corrode wiring in no time at all. They say it's non corrosive and harmless but the last place I worked, half the technicians and fuel hands were allergic to it. It used dry skin out and leave an irritating rash. If you work on the systems it corrodes the hell out of hand tools if not properly washed afterwards. I spilt some on a digital waterproof watch that I wore for work and it was dead the next day. Opened it up and it was pure green inside.

I wouldn't put it my tank because there are places it will come into contact with electricity. The sooner they ditch the stuff the better
 
3.5 efi said:
It's very corrosive on bare aluminium.
Click to expand...

Quite a few of the trucks have alloy adblue tanks, its the steel it corrodes which messes with the adblue injection equipment.
I wouldnt put the mixed fuel in my cars tank thats for sure.
Maybe worth putting some of the mixed stuff in a clear fizzy pop bottle and see if it settles out after a few weeks, then maybe worth a try.
 
My mate (yes its always "my mate" ) took some of the handy Adblue containers home to use as fuel cans for his strimmers and jenny

One of them was not washed out proper ,The petrol out of it was to run his jenny (i know its not spelt like that)
When it conked out he brought it into work and we stripped the card
Wow, from,where the petrol had mixed with air into the engine the Adblue had crystallized like a snow scene and blocked every thing up


I should have taken a picture really :doh:
 
Well it was sitting in thw contaminated fuel tank for a while the water had sank to the bottom and i pumped from the top to try and minimise the amount of water in it... hoping the urea stayed with the water although the diesel that i put in my tank smelt abit funny and looked cloudy... engine seems just as happy as ever though and im getting free fuel so im happy
 
If you add a little petrol to the mix-say 0.5% it should help the water stuff to drop to the bottom and clear the fuel on top
 
^^^^ +1, urea is corrosive and attacks all metal surfaces, just look at old farm fertiliser spreaders, there aren't any, cos they have rusted away.
the adblue is injected into the exhaust system surely, purely to clean up emissions, perhaps the diesel you are draining has far to much bio content and is being badly stored?
 
freelance said:
^^^^ +1, urea is corrosive and attacks all metal surfaces, just look at old farm fertiliser spreaders, there aren't any, cos they have rusted away.
the adblue is injected into the exhaust system surely, purely to clean up emissions, perhaps the diesel you are draining has far to much bio content and is being badly stored?
Click to expand...

Curious as to why you think a high bio content would cause issue?My td5 auto has been on 100% quality homebrew bio since may 2013 (my daily driver as my bio only costs 15p per litre)and my mondeo tdci is on 60% bio 40% derv presently-maybe you mean poorly made commercial stuff ?
 
sadly bio fuel is known not to store well for long periods, tends to seperate out and create problems, therefore needs to be obtained from outlets with high turnover, not from the tin shack down the road that might sell two tankers a year.
 
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