Don't Start It: AdBlue in a Diesel Tank in Cefn-bychan
Engine off, ignition off: that's where you begin if AdBlue has got into the diesel tank. Urea dissolved in water is what AdBlue is. Unlike fuel, it neither burns nor mixes, and no harm happens until your motor pulls it through. A drain and a thorough flush, done where your car is around Cefn-bychan, is usually all AdBlue in a diesel tank takes — if it is caught before your motor has been run. Phone 0333 366 0103 before you do anything else.
Cefn-bychan, AdBlue in your diesel tank: what to do at once
Things to do:
- Pull the keys out, and so no one switches your ignition on.
- If you are at all near moving traffic, put your hazards on.
- Which product, and roughly how much quantity? Hang on to the bottle or your receipt, and our technicians can see.
- Call us from where you are. A postcode starting LL14 3, or the name of the nearest street, gets our van to you without a search.
Not to do:
- Not even briefly, and not to roll the vehicle: your motor remains off.
- Many diesels run their pump the moment the ignition comes on, so keep it off.
- Pouring in more diesel does not work: AdBlue settles out instead of thinning.
- Any driving at all is to be avoided, including a short way along Hill Street.
- Beside the road, do not try emptying it yourself.
The attendants working at any Cefn-bychan forecourt — the Shell among them — will usually help pushing it aside if you ask. If you are on your own drive, leave the vehicle just where it stands.
What AdBlue does in a diesel tank
AdBlue is made for the exhaust, not the motor. From a dedicated reservoir it goes straight to the exhaust, cleaning what the motor lets out. A fuel pump is not designed to take it, and AdBlue was never supposed to travel through one.
Poured in with your diesel, it stays apart instead of mixing — quite unlike fuel. Heavier than diesel, it drops and pools below it — the very place the intake draws from. A vehicle filled on a driveway in Aber-nant yesterday evening and left unstarted counts as the simple one. No pump has pulled the AdBlue up yet — but once the engine turns, that is what is pulled first, straight from the bottom of the tank.
It causes two kinds of damage from there. Crystals and corrosion. As the water dries, it leaves urea that crystallises in filter elements and narrow passages; and, because it eats at certain metals, every part it reaches suffers for as long as it remains in there. By daybreak, a car parked in Cefn-bychan with AdBlue in its lines gets worse; if it is just in your tank, it doesn't. Water protects nothing. The high-pressure pump and each injector depend on diesel flowing through them, and so the water content harms them by itself.
Why is AdBlue in a diesel often the bigger problem?
Put petrol in a diesel at the Esso and you have a problem of thin fuel. It mixes with your diesel, and whilst it's inside your tank it causes no damage; the harm comes from running your engine on it.
AdBlue in a diesel is a different matter: not thin fuel, but no fuel at all. It can't just be run through, because it doesn't burn. Whether the car is in Newbridge or the heart of Cefn-bychan, firing it up "to see" costs more with AdBlue than almost any other slip, and the flush counts for more. The reasons: it won't remain mixed, and so watering it down is impossible; and crystals and corrosion outlast the following fill.
The same good news holds as with petrol. Emptying a tank is the simplest part on a fuel system, and without running, the AdBlue remains in it — anywhere across Wrexham your car has stopped.
How does AdBlue end up in a diesel tank around Cefn-bychan?
After dark, two caps side by side — the AdBlue cap and the diesel cap, occasionally under a single flap — may look the same. Nobody means it; many designs allow it. Usually it's not the filling station: someone buys a bottle heading home and pours it in outside the house.
It tends to happen in a few familiar ways. Rushing, outside Weston Rhyn Primary School, after a warning lamp came on during the school run, a parent tops up your car. A bottle is poured in at the end of the day on a drive just off Crane Street. Otherwise, after dark by The Holybush, the vehicle gets topped up by someone opening that flap the first time.
It comes up most in a hire car, a new car, a company motor, or the spare motor of a home with one of each fuel types — the cars people know least. Same slip, same first response — keep it switched off — anywhere you happen to be around Cefn-bychan or the rest of Wrexham.
Already started the engine with AdBlue in your diesel tank in Cefn-bychan?
The AdBlue has left the tank, then. It's been sucked through the filter and the fuel lines, and if the engine ran for any time, it has got to the high-pressure fuel pump and the injectors.
You may see the motor running unevenly, smoking, losing power, showing warning lights or cutting out, maybe on the way back from Tŷ Mawr Country Park or halfway across Cefn-bychan. No starting it again to check: pull over when safe, then switch everything off. With each start, more of it is pulled through.
If you were on the M53, under 25 miles from Cefn-bychan, come off at the next junction and stop somewhere sensible rather than pressing on.
Each mile carries the AdBlue further in. That is why a hop across Cefn-bychan to park beside Cefn Mawr Library and a drive of under 10 miles towards Wrexham are such distinct jobs. Let us know about how far it had come.
Wherever the vehicle came to a halt is where all of it gets done, even with more to clean out once the motor has been running. Spotted soon, it very rarely leaves permanent damage.
Cefn-bychan: how AdBlue is drained from a diesel
A street beside Cefn Bank, a driveway, a lay-by or a forecourt: anywhere the car has come to rest around Cefn-bychan, our engineers come to it. The job rests on three answers, and our technicians ask for before all else — what was put in, the quantity, and if your engine has turned over.
Next, draining that tank on the spot takes out the contaminated diesel along with the AdBlue together. A full flush counts much more after AdBlue than with petrol, because what remains won't clear out by itself. A test of the car follows at the end, once clean diesel is added and your filter gets flushed or, if needed, replaced. If your motor hasn't run, the majority of jobs take about half an hour once we are there. Low-noise enough for use outside a house at night, and fine on a working forecourt, our pumps are explosion-proof.
The final step is to prime your system on clean diesel. You drive off as soon as our engineers have fired it up, and it makes no difference whether your car is on a driveway around Cefn-bychan or in a bay at Ruabon. The test before our engineers leave is that it runs properly on new diesel. Our engineers do it all wherever the car has ended up, and it never needs to be taken to a garage. Afterwards, you are given the paperwork for your insurer: a VAT invoice and a report from the engineer.
About Cefn-bychan
Cefn-bychan is a village situated on the riverside in Wrexham county, with a mix of semi-detached housing and a population of around 1595 residents. Cefn-bychan sits at an elevation of 113 metres, close to the nearby villages of Cefn-mawr and Rhosymedre. Cefn-bychan is located near the historic Pont Cysyllte aqueduct and is approximately 6 miles from Wrexham city centre.
Cefn-bychan and Wrexham: AdBlue drains across the area
Over the LL postcode area, the teams taking AdBlue jobs in Cefn-bychan reach much of Wrexham too, Cefn-mawr, Rhosymedre and Pont Cysyllte among them. If you are close to a border, or somewhere hard to explain, ring and ask rather than guessing.
No towing is needed. In Cefn-bychan, a village, a mobile service fits: your car is drained on the spot, whether in a drive, a residential street, a parking area or a forecourt.
AdBlue in a diesel tank around Cefn-bychan: the cost of fixing it
Each job differs, and so not one single price would be fair. Three things shift the cost: whether your engine has run and for how long, how much AdBlue was put in, and where your car is. That last one comes down to whether a technician can reach it safely, and an open drive is easier than a tight space behind St John's.
Which fluid went in, what quantity, plus if the engine ran: every Cefn-bychan call begins by asking exactly that, before a quote, not afterwards. Their answers narrow the range right down to a single number.
You get that quote by phone, before anyone heads out, and you pay on the day, by card or over the phone, with nothing upfront. While our engineer is on the way, check your policy: many cover misfuelling.
Alongside the car around Cefn-bychan, still?
In that case, touch nothing — that is the best step there is. Ignition off, motor off, keys out. Ring 0333 366 0103 then tell us it is AdBlue, roughly how much, and if it has run. Petrol in Diesel takes it from there, around Cefn-bychan or anywhere across Wrexham.