Don't Start It: AdBlue in a Diesel Tank in Sunbury
If AdBlue has got into your diesel tank, leave your engine off then keep the ignition off. Water with urea mixed in it: that's AdBlue. It doesn't burn, it doesn't mix with diesel, and the harm it does begins when the fuel system draws it in. Caught before the motor has been run, AdBlue in a diesel tank is usually a drain and a thorough flush, done where the car is around Sunbury. No step comes before calling 0333 366 0103.
AdBlue in the diesel tank in Sunbury: the first few minutes
To do:
- Remove the keys, and that stops anyone turning the power on.
- If you are at all close to moving traffic, put the hazards on.
- Hold on to your receipt or the empty bottle, and so you can tell us what got in and about how much.
- Tell us a postcode starting TW16 5, or whichever street is nearest, and the van reaches you straight — so ring wherever you are.
Do not:
- Do not start the engine, even for a moment to shift your car.
- The ignition remains off: on lots of diesels, switching it on is enough to start the fuel pump.
- AdBlue does not dilute in diesel — it separates out — so adding more fuel won't thin it.
- Do not drive the car anywhere, not even a short way down Roper Crescent.
- No draining it yourself, either, on the verge.
Get the people behind the counter to help you roll your vehicle away from the pumps if you're on a forecourt around Sunbury, whether it is the BP or somewhere else. If you are on your own drive, leave the vehicle exactly where it sits.
AdBlue in a diesel tank, and what it does there
Not the motor but the exhaust is where AdBlue belongs. Its own tank keeps it, and from there it's sprayed into the exhaust, where it cleans the fumes. Nothing in it is meant to pass through a fuel pump, and nothing in a fuel pump is built to handle it.
Inside a diesel tank it behaves very differently from fuel. It doesn't mix in. It drops, since it is denser than diesel, and settles down where the pickup takes its supply from. A motor filled on a drive in Felthamhill yesterday evening and left unstarted counts as the simple one. Nothing has sucked the AdBlue up yet — though once your engine runs, that's what is pulled first, directly from the bottom of that tank.
Once it's drawn in, the harm takes 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 hits for as long as it stays there. By daybreak, a vehicle parked in Sunbury with AdBlue through its pipework gets worse; if it is only in your tank, nothing changes. Water lubricates nothing. The high-pressure pump and every injector need diesel running through them, so the water content harms them in its own right.
Why AdBlue in a diesel is often more significant than petrol
An issue of thinned fuel is what you end up with from filling a diesel with petrol at the Tesco. Blended into the diesel and left still, it's no threat for now; running the engine is the harm.
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 does not burn. Deposits and corrosion remain through the following tankful, and AdBlue splits again out of the diesel, and so thinning it can't work. That is why the flush matters so much, and trying the engine "to see" does more harm with AdBlue than almost any other mistake — in Upper Halliford or the centre of Sunbury alike.
With AdBlue, the good news is no distinct from petrol. Never run? Then the AdBlue waits only in your tank, the simplest bit of the whole system to empty, wherever the car has come to rest across Surrey.
How does AdBlue end up in a diesel tank in Sunbury?
Nobody means to do it. The AdBlue filler on plenty of cars sits right next to your diesel filler, occasionally under the same flap, and the two caps can look alike in poor light. Mostly it takes place with a bottle bought on the way home and poured in on the driveway, not at the forecourt.
A few familiar ways cover most cases. Rushing, outside St Ignatius Catholic Primary School, after a warning lamp flashed on during the school run, someone refills the car. Near Cagney Close, a driver tips a container in at home in the evening. Another pattern: darkness, the car park by The Jubilee, and a driver opening that flap for the first time.
It comes up the most in a hire car, a brand-new car, a company vehicle, or the other motor in a home with both fuels — the cars people know least. Wherever you are in Sunbury or the remainder of Surrey, it is the same slip and the same first answer: leave it off.
Sunbury: started your engine with AdBlue in the diesel tank?
Then the AdBlue has left your tank. With any running, it travels to the high-pressure pump and each injector, after passing through your filter and lines.
Maybe coming back from Kempton Cricket Ground, or part way across Sunbury, your engine may go rough, smoke, drop power, flash your dash or cut out. Once you safely can, stop then switch everything off — with no restarting to test. With each start, more of that is pulled through.
Sunbury lies under a mile from the M3; if you were on it, exit by the first junction and stop safely rather than driving on.
Mileage matters: every mile pushes the AdBlue deeper into the system, so heading for Westminster, under 15 miles away, makes a much larger job than crossing Sunbury to the car park by The Loyola Centre & Nursery. Tell us about how far it had come.
Once your engine has been run, the flush takes in more, and all of it is done where the vehicle has ended up. Long-term damage is very unusual if it's caught early.
What does an AdBlue drain on a diesel involve in Sunbury?
The car stays where it is, whether that is a street beside Sunbury War Memorial, a driveway, a layby or a filling station in Sunbury, and the van travels to it. Which fluid was put in, roughly the quantity, plus if your engine has turned over: our technicians check before all else, because those decide the work.
Then your tank is drained where the vehicle sits, and so the tainted fuel and the AdBlue come out together. What remains from AdBlue will not flush out unaided, and so the fuel system gets a full flush, which matters much more here than for petrol. The filter is cleaned, or replaced where it needs to be; clean diesel goes in; and the vehicle is tested. Roughly half an hour once we arrive is typical for most jobs where your motor has not run. Quiet enough for use outside a house at night, and fine on a working forecourt, our pumps are explosion-proof.
Last, your system is primed with fresh diesel. After that our technicians start it and you set off, whether from a parking bay at the nearest station or a drive in Sunbury. The check before we go is that it runs properly on fresh diesel. The entire job is done where the car is, so it never needs to go to a garage. Insurers want a VAT invoice and an engineer report, and you get both afterwards.
About Sunbury itself
Sunbury is a town in north Surrey, situated on the River Thames at an elevation of around 9 metres. Sunbury sits approximately 13.9 miles from central London, with Westminster being the nearest city at 13.7 miles away. Sunbury has a mix of housing types, but semi-detached homes are predominant, and the town is near notable areas such as Sunbury-on-Thames and Kempton Park. Sunbury is also close to Sunbury Common, a nearby open space.
Sunbury and Surrey: AdBlue drains across the area
Throughout the TW postcode area, the teams answering AdBlue call-outs in Sunbury serve most of Surrey as well, Sunbury-on-Thames, Kempton Park and Sunbury Common among them. If you're near a border, or somewhere hard to describe, ring and ask rather than assuming.
Sunbury is a riverside town, and a call-out drain suits it: whether your car is on a home drive, a residential street, a car park or a forecourt, we drain it where it sits, and so it never needs to be moved to us.
What does AdBlue in a diesel tank cost to sort out around Sunbury?
No single figure could be honest, since each job differs. Whether your engine has run, and for how long, comes first in what changes the price. How much AdBlue was put in comes next, and then the location of the vehicle, since an open drive is easier for our van to get to safely than a tight space behind Open Door Church.
For that reason, each enquiry from Sunbury opens with the same trio — which fluid went in, how much, whether it ran — before any figure. The answers turn a range into a straight quote.
Our quote is given during the call, before anyone sets off; payment happens on the day, by card or by phone, with nothing upfront. Misfuelling cover comes with many insurance policies, so it pays to look at yours before the van gets there.
Sunbury: still next to the vehicle?
Leaving the vehicle alone is, then, the most useful move you can do. Keys out; engine and ignition off. Call 0333 366 0103 and tell us it is AdBlue, roughly how much, and whether it's run. Petrol in Diesel takes it from there, in Sunbury or anywhere across Surrey.