Mangrove Green: AdBlue in the Diesel Tank? Leave It Off
Motor off, ignition off: that is how you begin if AdBlue has got into your diesel tank. Urea dissolved in water is what AdBlue is. The trouble starts once it's pulled through the pump — it will not ignite, and it won't combine with diesel. A drain and a thorough flush, done where your car is around Mangrove Green, is generally all AdBlue in a diesel tank takes — if it is caught before the engine has been run. Before you do anything else, ring 0333 366 0103.
Those opening minutes: AdBlue in the diesel tank around Mangrove Green
Things to do:
- Keys out — then no one can power anything on.
- If you're at all close to moving traffic, put the hazard lights on.
- So you can give us which fluid it was and roughly how much, keep the receipt or the empty bottle.
- The van finds you fastest with a postcode starting LU2 8, or simply the name of a street close by, so call from the car.
Things not to do:
- No starting your engine — not for a second, not to reposition the vehicle.
- Don't switch your ignition on. On many diesels that alone runs the fuel pump.
- AdBlue does not dilute in diesel — it separates out — so adding more fuel won't weaken it.
- Keep the vehicle where it is rather than driving it anywhere, even a short way down Mangrove Road.
- No draining it yourself, at all, at the verge.
At a forecourt around Mangrove Green, whether it's the Asda or another one, ask the staff to help you roll your car away from the pump. Stopped on your own driveway? Then it remains exactly as it is.
What AdBlue does in a diesel tank
Not the motor but the exhaust is where AdBlue belongs. Kept in a dedicated tank, it is injected into the exhaust stream to clean the gases. Nothing in it is supposed to pass through a fuel pump, and nothing in a fuel pump is made to handle it.
Inside a diesel tank it behaves really differently from fuel. It doesn't mix in. It's heavier than diesel, and so it sinks and collects at the bottom of your tank, which is where the pickup draws fuel from. The first thing the system pulls through, after it runs, is the AdBlue. So a car that had AdBlue poured in on a drive in Stopsley last night, and has not been started since, is still the straightforward case: the AdBlue is lying at the bottom of the tank, and nothing has pulled it in.
It causes two kinds of harm from there. What remains once the water evaporates is urea, which forms crystals: they lodge in narrow passages and clog filters. On top of that, it attacks certain metals in the fuel system, and keeps going till it's flushed out. If the AdBlue has reached the pipework, waiting overnight around Mangrove Green makes things worse. Inside that tank only, time does nothing. Water protects nothing. The injection pump and every injector depend on diesel running through them, and so the water content damages them in its own right.
Petrol or AdBlue in a diesel: why AdBlue is commonly worse
Fill a diesel with petrol by mistake at the Shell, and the problem is diluted fuel. No harm comes while it sits put, blended into your diesel — only when the engine runs on it.
AdBlue in a diesel is another problem: not thin fuel, but no fuel at all. It can't just be run through, because it does not burn. Nor can it be thinned, because it separates back out — and the following tankful will not rinse away deposits or corrosion. So the flush counts for more here, and trying your engine "to see", in the heart of Mangrove Green or out in Wandon End, costs more than nearly any other error.
As with petrol, there is good news. Not started? Then the AdBlue waits just inside your tank, the easiest section of the entire system to clear, wherever the vehicle has come to rest in Hertfordshire.
How AdBlue ends up in a diesel tank in Mangrove Green
It's not deliberate. Plenty of cars have the AdBlue inlet beside the diesel one, now and then behind a single flap, and mixing them up is simple in poor light. Most of the time it happens with a bottle bought on the way home and poured in on the driveway, not at the pump.
It tends to take place in a few familiar ways. Hurrying, outside Cockernhoe Endowed CofE Primary School, after a warning lamp flashed on during the school run, a parent refills your car. Close to Luton Road, someone pours a bottle in on that drive in the evening. Else, in dim light by King William, your vehicle gets topped up by a driver using that flap the first time.
The least familiar vehicles see it the most — hire cars, brand-new ones, fleet ones, and the spare car of a home with one of each fuel types. Leave it switched off: that's the first step to the same mistake, wherever around Mangrove Green or the remainder of Hertfordshire you happen to be.
Already started the motor with AdBlue in your diesel tank around Mangrove Green?
Then the tank is no longer where the AdBlue is. Through the fuel filter, through the pipework, and — given any running time — on to the high-pressure pump and every injector: that is how far it has gone.
Lumpy running, smoke, dropping power, dashboard warnings or stalling: any may appear, maybe midway across Mangrove Green or returning from Messina Plantation. No starting it again to check: stop once safe, then switch everything off. With each start, more of that is pulled through.
Exit the M1, under 5 miles from Mangrove Green, at the next junction and park somewhere safe, not driving on.
How far it went matters. A couple of hundred yards across Mangrove Green to the car park by Cockernhow Memorial Hall is a very different job from a run towards St Albans, under 15 miles away, with the AdBlue reaching further into your system with each mile. Approximately how far had it come? Tell us.
Wherever the car came to a stop is where all of it gets done, even with more to flush after the engine has been started. Very seldom does it leave permanent damage if it's spotted quickly.
Emptying AdBlue in a diesel in Mangrove Green: what it takes
A street by St Hugh, a driveway, a layby or a forecourt: wherever your car has come to rest around Mangrove Green, our engineers come to it. What went in, about the quantity, and if the motor has turned over: our technicians check first, since those shape the job.
The contaminated diesel and the urea come out as one after your tank is drained, right there. Residue from AdBlue won't wash out by itself, and so the fuel system gets a full flush, which matters much more here than with petrol. A test of your car comes at the end, once clean diesel is added and the filter is flushed or, where needed, replaced. The majority of these jobs are a half-hour job once our technicians get there, provided your motor has not run. The pumping gear is explosion-proof, so a busy filling station is no issue, and it's hushed enough for a residential street late at night.
Lastly, your system is primed with fresh diesel. You drive off as soon as we have started the car, and it makes no difference whether your car is on a driveway around Mangrove Green or in a bay outside Luton Airport Parkway. It is checked on fresh diesel to be sure it runs properly before we head off. No workshop is required at any point, with the whole job done then and there. Insurers ask for a VAT invoice and an engineer report, and both come at the end.
About Mangrove Green, for a moment
Mangrove Green is a small village in Hertfordshire, situated inland at an elevation of around 160 metres. Mangrove Green lies approximately 29 miles north of London and 10 miles east of St Albans, near the villages of Cockernhoe and Tea Green. Mangrove Green has a population of around 559 people, predominantly living in semi-detached houses.
Mangrove Green and Hertfordshire: AdBlue drains across the area
Cockernhoe, Tea Green and Wigmore are among the towns around Mangrove Green that the same teams serve, along with most of Hertfordshire beyond, over the LU postcode area. Near a border, or anywhere tricky to pin down? Asking is better than assuming, and so phone.
No towing is needed. In Mangrove Green, a rural village, a mobile service fits: your car is emptied on the spot, be it in a drive, a side street, a parking area or a forecourt.
Mangrove Green: what AdBlue in a diesel tank costs to fix
Each job is different, so no fixed quote would be honest. Three things change the cost: whether the motor has run and for how long, how much AdBlue was put in, and where the vehicle is. That last one turns on whether our van can reach it safely, and an open driveway is simpler than a tight gap behind Mangrove Hall.
That's why every call from Mangrove Green starts with the same three queries, asked before giving a figure, not after: what got in, how much, and if it's run. With them, the range narrows to one fixed figure.
Our quote is quoted on the call, before a van sets off; settling up comes on the day, by card or over the phone, and nothing upfront. Misfuelling cover is part of plenty of insurance policies, so it is worth looking at yours before the van arrives.
Mangrove Green: still beside your car?
Leaving your vehicle alone is, then, the best thing you can do. Keys out, engine off, ignition off. Petrol in Diesel takes over the remainder, across Mangrove Green or wherever within Hertfordshire, after you phone 0333 366 0103 to say it's AdBlue, about what quantity, and whether it ran.