Don't Start It: AdBlue in a Diesel Tank in Charvil
If AdBlue has gone into your diesel tank, leave the engine off and keep your ignition off. Urea dissolved in water is what AdBlue is. The harm begins once it's sucked through the pump — it will not ignite, and it will not blend with diesel. Caught before the motor has been run, AdBlue in a diesel tank is normally a drain and a thorough flush, done where the vehicle is around Charvil. First, ring us on 0333 366 0103.
Those opening minutes: AdBlue in the diesel tank in Charvil
To do:
- Pocket the keys, and that prevents someone switching the electrics on.
- Near moving traffic? So put the hazards on.
- Keep the till receipt or the empty bottle, so you can tell us what went in and roughly how much.
- Ring right where you are. Quote a RG10 9 postcode or the nearest street sign, and no one has to hunt for you.
Not to do:
- No starting your engine — not for a second, not to shift your vehicle.
- Your ignition remains off: on lots of diesels, turning it on is enough to start your fuel pump.
- AdBlue does not dilute in diesel — it separates out — so adding extra diesel won't thin it.
- Any driving at all is best avoided, even a short way along New Bath Road.
- Do not try to drain the vehicle yourself at the kerbside.
The attendants on duty at any Charvil forecourt — the Texaco among them — will normally help rolling it clear if you ask. At home, the car remains just where it is.
What does AdBlue do in a diesel tank?
Not your engine but your exhaust is where AdBlue belongs. Its own reservoir keeps it, and from there it's sprayed into the exhaust, and there it treats the fumes. Neither side suits the other: urea does not belong in an injection pump, and an injection pump cannot deal with urea.
Tipped in with the diesel, it stays apart instead of mixing — entirely unlike fuel. Heavier than diesel, it sinks and collects underneath it — the same spot the intake draws from. Simplest of all: a vehicle that got AdBlue in Sonning Eye overnight and hasn't turned since. The AdBlue waits at the foot of your tank, undrawn — though it will be first through once the motor starts, ahead of any diesel at all.
Once it's sucked in, the harm comes in two forms. As its water goes, the urea left behind crystallises, and the crystals block filters and settle in fine passages. And it is corrosive to some of the metals a fuel system is made from, and so it keeps running on the parts it reaches for as long as it remains there. Where the AdBlue has reached the pipework, waiting till morning around Charvil leaves it worse. Inside that tank alone, time costs nothing. The water in it causes harm of its own: your high-pressure pump and your injectors depend on diesel to lubricate them, and water offers them nothing.
Petrol or AdBlue in a diesel: why AdBlue is commonly worse
Top up a diesel with petrol by mistake at the BP, and this problem is thinned fuel. No harm is done while it sits unused, mixed into the diesel — only when your engine works on it.
AdBlue in a diesel is a different matter: not thin fuel, but no fuel at all. Not burning, it cannot simply be run through. Nor can it be watered down, since it separates again — and the following tankful won't rinse away deposits or corrosion. So the flush counts for more with AdBlue, and turning the key "to see", in the centre of Charvil or out in Ruscombe, costs more than nearly any other error.
The same good news applies as with petrol. Emptying a tank is the simplest part on any fuel system, and with no start-up, the AdBlue stays in it — anywhere across Berkshire the vehicle sits.
How does AdBlue end up in a diesel tank around Charvil?
In dim light, two caps side by side — the AdBlue one and the diesel one, occasionally behind a single flap — may look the same. No one means it; many designs allow it. Mostly it's never the forecourt: someone buys a container driving home and pours it in outside the house.
It tends to take place in a couple of familiar ways. Hurrying, outside Polehampton Church of England Infant School, after a warning lamp flashed on during the school run, a parent refills the vehicle. A bottle is poured in at the end of the day on a drive just off Park View Drive North. Or the vehicle is topped up in the car park outside The Wee Waif, in poor light, by someone who has never opened that flap before.
It crops up most in a hire car, a brand-new car, a company car, or the spare vehicle in a home with both fuel types — the vehicles people know the least. Wherever you're in Charvil or the remainder of Berkshire, it's the same slip and the same first answer: leave the car off.
Started the motor with AdBlue in the diesel tank in Charvil?
The AdBlue has left the tank, then. It has been pulled through the fuel filter and your lines, and if the motor ran for any time, it has reached the high-pressure pump and your injectors.
Perhaps returning from Park Lane Recreation Ground, or part way across Charvil, the motor may go rough, smoke, lose power, flash your dash or cut out. When safe, pull over and switch it off — with no turning it on again to test. With each start, more of it is pulled through.
On the A329(M), under 3 miles from Charvil, the first junction is where to leave, and somewhere sensible is where to stop — not carrying on.
Distance matters: every mile pushes the AdBlue deeper into your system, and so driving towards Oxford, under 25 miles away, gives a much larger job than crossing Charvil to the car park by St Patrick's Church. Roughly how far had it come? Tell us.
Wherever the vehicle came to a stop is where all of it gets done, even with more to rinse out after your engine has been started. Permanent damage is very uncommon when it is noticed quickly.
Clearing AdBlue in a diesel around Charvil: what it takes
Anywhere it has stopped in Charvil — a forecourt, a lay-by, a driveway, a street by Charvil Village Hall — our van comes to the vehicle. Which fluid went in, roughly how much, plus whether the engine has been run: our engineers check before all else, because those decide the job.
Right there, that tank is then drained, and both the contaminated diesel and the urea come out as one. A full flush counts far more with AdBlue than with petrol, since residue won't clear out by itself. Testing the vehicle comes last, after fresh diesel goes in and the fuel filter gets cleaned or, if needed, swapped. The majority of these jobs are a half-hour job once we turn up, if the motor hasn't run. Explosion-proof pumps mean a busy forecourt sensible to work on, and they're quiet enough not to disturb the street at night.
The final step is to bleed the system on clean diesel. You head off as soon as our engineers have started it, and it makes no difference whether your car is on a driveway around Charvil or in a space outside Twyford. It's tested on clean diesel to confirm it runs smoothly before our engineers head off. The entire job is done where your car is, so it never needs to go to a workshop. Afterwards, there is the paperwork for the insurer: a VAT invoice and a written report from the engineer.
About Charvil
Charvil is a village in Berkshire, situated on the banks of the River Thames at an elevation of around 38 metres. Charvil lies within the South East region of England, approximately 32.7 miles from London and 24.7 miles from Oxford. Charvil is surrounded by nearby places such as Twyford, Borough Marsh, and Sonning, and is characterized by its predominantly detached housing stock. Charvil has a population of around 1789 residents.
Charvil and Berkshire: AdBlue drains across the area
AdBlue jobs in Charvil are passed to vans that serve the towns around it — Twyford, Borough Marsh plus Sonning — and much of Berkshire beyond, across RG postcodes. Ring and ask rather than guess when you are close to a border, or anywhere tricky to pin down.
No moving is needed. In Charvil, a village, a mobile service works: your vehicle is emptied on the spot, whether in a driveway, a residential street, a car park or a filling station.
What AdBlue in a diesel tank costs to put right in Charvil
Every job is different, and so not one single quote would be fair. What changes the cost is, firstly, whether the motor has run and for how long; then how much AdBlue got in; and then where the vehicle is and whether our van can reach it safely, which is easier on an open driveway than in a tight gap behind Twyford Library.
Before any quote, never after, every call from Charvil opens with three questions: the fuel, the quantity, plus whether it ran. The replies turn a range into a straight price.
You hear that price by phone, before anyone sets off, and you pay on the day, by card or over the phone, with nothing upfront. While our engineer is travelling, check your insurance: many include misfuelling.
Still next to the car around Charvil?
Then, do nothing — that is the most helpful step there is. Keys out, engine off, ignition off. Call 0333 366 0103 then tell us it's AdBlue, roughly how much, and if it has run. Petrol in Diesel takes it from there, around Charvil or anywhere in Berkshire.