--- title: Don't Start It: AdBlue in a Diesel Tank Dunsley canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/dunsley-staffordshire/ location: Dunsley county: Staffordshire latitude: 52.452000 longitude: -2.221350 service: AdBlue in a Diesel Tank updated: 2026-10-07 --- # AdBlue in the Diesel Tank in Dunsley? Keep It Switched Off If AdBlue has got into the diesel tank, leave your engine off and leave your ignition off. Urea dissolved in water is what AdBlue is. Not like fuel, it neither burns nor blends, and nothing happens till your motor sucks it round. If your engine has not run yet, AdBlue in a diesel tank is generally emptied and carefully rinsed where the car stands around Dunsley. First, ring us on 0333 366 0103. ## AdBlue in the diesel tank around Dunsley: the first few minutes Do: - So nobody can switch the ignition on, pull your keys away. - If you're anywhere close to moving traffic, put your hazards on. - Which fluid, and about what quantity? Hang on to the bottle or your receipt, and we can know. - Tell us a postcode starting DY7 6, or whichever street is nearest, and the van finds you straight — so call wherever you are. Things not to do: - Not even for a second, and not to shift the car: your engine stays off. - Turning the key to ignition alone starts the pump going on plenty of diesels. Avoid it. - AdBlue doesn't dilute in diesel — it separates out — so adding extra diesel will not weaken it. - Do not drive the car anywhere, not even a short stretch down Hampton Grove. - No emptying it yourself, either, at the roadside. Ask the people behind the counter to help you move the vehicle off the pumps if you are at a forecourt in Dunsley, whether it is the the nearest petrol station or elsewhere. On the drive, your car stays exactly where it was left. ## AdBlue in a diesel tank: what it does AdBlue is made for the exhaust, not your engine. Kept in a separate tank, it is squirted into the exhaust stream to treat the fumes. Not one side fits the other: urea does not belong in an injection pump, and a pump cannot take urea. Inside a diesel tank it acts really differently from fuel. It does not mix in. The pickup sucks fuel from the deepest part of that tank, and that is precisely where AdBlue ends up: as it is denser than diesel, it sinks. Simplest of all: one that had AdBlue in Caunsall overnight and hasn't been started since. The AdBlue waits at the foot of that tank, undrawn — though it would be the first thing through once your motor runs, before any diesel at all. Two kinds of harm come from there. What remains once the water evaporates is urea, which forms crystals: they lodge in narrow channels and clog filters. On top of that, it eats at some metals in a fuel system, and carries on till it is flushed out. Where the AdBlue is in the pipework, waiting till morning around Dunsley makes it worse. Inside the tank alone, time costs nothing. The water in it does harm of its own: your high-pressure pump and the fuel injectors rely on diesel to lubricate them, and water gives them nothing. ## Petrol or AdBlue in a diesel: why AdBlue is often worse Fill a diesel with petrol by mistake over at the BP, and the problem is diluted fuel. It mixes with your diesel, and whilst it is in that tank it does no harm; the harm comes from running the engine on it. AdBlue in a diesel is an issue of the wrong substance altogether. Not burning, it can't just be run through. Crystals and corrosion stay through the following fill, and AdBlue separates back out of your diesel, so thinning it won't help. That is why the flush matters so much, and turning the key "to see" does more harm with AdBlue than nearly any other mistake — in Prestwood or the centre of Dunsley alike. As with petrol, there is good news. Anywhere in Staffordshire the car has come to rest, an unrun motor leaves the AdBlue yet inside the tank: the easiest part of a fuel system to clear. ## How does AdBlue end up in a diesel tank in Dunsley? No one means to do it. The AdBlue filler on plenty of motors waits right next to the diesel filler, occasionally under the same flap, and the two caps can look alike in poor light. Usually it's never the filling station: someone picks up a container driving home and pours it in outside the house. It tends to occur in a couple of familiar ways. Hurrying, outside Brindley Heath Junior School Academy, after a warning light flashed on during the school run, someone tops up the vehicle. After work, a container is tipped in on a driveway close to Brindley Brae. Otherwise, in dim light by The Vine, the vehicle gets topped up by a driver opening that flap the first time. It crops up most in a hire car, a new motor, a fleet car, or the spare vehicle of a family with both fuels — the cars people use least. Wherever across Staffordshire, Dunsley as well, the mistake doesn't change, and neither does the first step: keep it off. ## Dunsley: started your engine with AdBlue in the diesel tank? In that case, the AdBlue is no longer inside your tank. The filter and lines have had it sucked along, and any running time carries it on to the high-pressure pump and every injector. Rough running, smoke, lost power, dashboard warnings or stalling: any may show up, perhaps midway across Dunsley or returning from Littlewood's Common. Stop as soon as it is safe, switch off, and do not restart the car to check. Each start pulls more of that through. On the M5, under 10 miles from Dunsley, the next junction is where to leave, and somewhere sensible is where to stop — not driving on. Each mile carries the AdBlue further into your system. That's why a hop across Dunsley to park near Kinver Miniature Railway and a drive of under 15 miles for Wolverhampton are very distinct jobs. Tell us roughly how far it had come. Once the motor has been started, the flush covers more, and all of it is done where the vehicle has come to a stop. Permanent damage is very uncommon when it is caught quickly. ## What emptying AdBlue from a diesel involves around Dunsley Our technicians come to the car, wherever it has stopped around Dunsley: a side street near Kinver Sports & Community Association, a drive, a lay-by or a forecourt. Before anything else we ask what got in, roughly how much, and if your motor has been run, because those answers determine this work. Then your tank is emptied where the car stands, so the contaminated fuel and the AdBlue come out together. A careful flush counts far more after AdBlue than with petrol, since residue will not clear away on its own. After that, the filter: cleaned, or replaced when it has to be. After that clean diesel, then a test of the car. The majority of these jobs are a half-hour visit once our technicians turn up, if your motor has not run. Explosion-proof pumps mean a live forecourt sensible to work on, and they're quiet enough not to disturb the street at night. Priming the system with new diesel comes at the end. Whether it's a parking space outside Stourbridge Town or a driveway around Dunsley, that is where our technicians fire it up and you drive off. Before we go, our engineers confirm it's running properly with fresh diesel in. We do it all wherever the vehicle has stopped, and it never has to go to a garage. At the end, you are given paperwork for the insurer: a VAT invoice plus a written report from the engineer. ## About Dunsley, briefly Dunsley is a village in southern Staffordshire, situated on the banks of a river at an elevation of around 70 metres. Dunsley lies approximately 10 miles west of Wolverhampton and is close to nearby settlements such as Kinver and Whittington. Dunsley has a population of around 872 people, predominantly living in detached houses. Dunsley is located about 110 miles northwest of London, in the West Midlands region. ## Dunsley and Staffordshire: AdBlue drains across the area Throughout the DY postcode area, the teams taking AdBlue call-outs in Dunsley serve much of Staffordshire too, Kinver, Whittington and Stourton among them. Guessing won't help close to a border or somewhere hard to pin down; phone and ask. Dunsley is a village, and an on-site drain suits it: whether the car is on a home drive, a residential street, a car park or a forecourt, our engineers drain it where it is, so it never needs to be shifted to us. ## Dunsley: what AdBlue in a diesel tank costs to fix Because the callouts differ, a flat figure would not be honest. The cost shifts first with how long, if at all, the motor has been running, and next with the quantity of AdBlue that got in. After that it depends on where the vehicle is and whether our van can get to it safely, which is easier on an open driveway than in a tight spot behind St Peter. For that reason, each call from Dunsley begins by asking the identical trio — which fluid got in, what quantity, if the engine ran — before any figure. The replies turn a range into a straight quote. You hear that quote on the phone, before anyone heads out, and you pay on the day, by card or over the phone, with nothing upfront. While the van is on the way, dig out your policy: plenty include misfuelling. ## Still next to the vehicle around Dunsley? In that case, touch nothing — that is the best step available. Keys out, engine off, ignition off. Tell us it's AdBlue, roughly what quantity, and whether the engine ran, on 0333 366 0103. After that Petrol in Diesel takes over, in Dunsley or anywhere in Staffordshire.