--- title: AdBlue in a Diesel Tank Ferndown? Leave It Off canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/ferndown-dorset/ location: Ferndown county: Dorset latitude: 50.801260 longitude: -1.890240 service: AdBlue in a Diesel Tank updated: 2026-10-05 --- # Don't Start It: AdBlue in a Diesel Tank in Ferndown If AdBlue has got into your diesel tank, leave your engine off then keep your ignition off. Urea mixed in water is what AdBlue is. The trouble begins once it's sucked through the pump — it will not ignite, and it won't combine with diesel. If the motor has not run yet, AdBlue in a diesel tank is generally emptied and thoroughly purged where the vehicle sits in Ferndown. First, phone us on 0333 366 0103. ## Ferndown, AdBlue in the diesel tank: what to do right away Do: - Take your keys out, so no one switches your ignition on. - If you're anywhere close to moving traffic, put the hazard lights on. - The empty bottle or the till receipt shows us the product and the quantity, and so don't bin it away. - Our van locates you quickest with a postcode starting BH22 9, or just the name of a street nearby, so call from the car. Do not: - Don't start your motor, even for a moment to shift the car. - The ignition stays off: on lots of diesels, turning it on is enough to run your fuel pump. - AdBlue doesn't mix in diesel — it separates out — so adding extra diesel will not thin it. - Keep the vehicle where it is rather than driving it anywhere, even a short way up Victoria Road. - Beside the road, do not try emptying it on your own. At a forecourt around Ferndown, whether it's the Tesco or another one, ask the attendants to help you roll the car away from the petrol pump. At your own driveway, don't touch it at all. ## AdBlue in a diesel tank: what it does Made for the exhaust, AdBlue has no place in the motor. Its own reservoir holds it, and from there it is sprayed into the exhaust, and there it treats the gas. Neither side suits the other: urea does not belong in a pump, and a pump cannot deal with urea. Fuel mixes; AdBlue, once poured in, won't. Its behaviour is nothing like diesel's. Denser than diesel, it drops and pools below it — the same place the intake draws from. Once your system runs, the AdBlue is first to be pulled through. Until then it waits underneath the diesel, which is why a vehicle topped up in Dudsbury yesterday and not started remains the straightforward case, provided nobody touches the key. From there it does two kinds of damage. What remains once the water evaporates is urea, which forms crystals: they settle in narrow passages and block filters. Worse, it attacks certain metals in a fuel system, and carries on till it is flushed out. Lines carrying AdBlue spell damage by morning for a car parked in Ferndown. Just inside that tank, it stays stable. Then there's the water: it offers no protection to the parts that need it most — the injection pump and every injector. ## AdBlue in a diesel: why it's commonly worse than petrol Petrol pumped into a diesel on Murco's forecourt makes the fuel thin — that is the whole problem. It mixes with your diesel, and whilst it is inside that tank it does no harm; the harm comes from running your motor on it. AdBlue in a diesel is an issue of the wrong substance altogether. Since it does not burn, running it through is not an option. Crystals and corrosion stay after the following tankful, and AdBlue splits again out of the diesel, so thinning it can't work. That is why the flush counts so much, and turning your key "to see" costs more with AdBlue than almost any other mistake — in Longham or the centre of Ferndown equally. With AdBlue, the good news is no different from petrol. Clearing a tank is the simplest part on a fuel system, and with no start-up, the AdBlue remains in it — anywhere around Dorset the car sits. ## How does AdBlue end up in a diesel tank in Ferndown? After dark, two caps together — the AdBlue one and the diesel cap, occasionally behind one flap — may look the same. Nobody intends it; many layouts invite it. It mostly happens at home, from a bottle bought en route home, not at the filling station. It tends to happen in a few familiar ways. A warning light comes on during the school run, and the top-up occurs in a hurry outside Ferndown First School. A bottle is poured in at the end of the day on a drive just off New Road. Or the vehicle is topped up in the car park at The White Heather, in poor light, by somebody who has never opened that flap before. It occurs most in the cars drivers know least: a hire car, a new vehicle, a company car, or the second car of a household with one diesel and one petrol. Keep it off: that's the first step to an identical slip, wherever around Ferndown or the rest of Dorset you happen to be. ## Ferndown: started your engine with AdBlue in your diesel tank? If so, the AdBlue is no longer inside the tank. It's been pulled through your filter and the lines, and if your engine ran for any time, it has reached the high-pressure fuel pump and the fuel injectors. Rough running, smoke, lost power, dashboard warnings or stalling: each may show up, perhaps part way across Ferndown or returning from Garden Of Memories. No starting it again to check: pull over when it is safe, then turn everything off. Every start pulls more of that through. If you were on the M27, under 25 miles from Ferndown, come off at the next exit and stop somewhere sensible instead of pressing on. How far it went matters. A few hundred yards across Ferndown to the car park by Ferndown Library is a very different job from a run towards Salisbury, under 25 miles away, with the AdBlue reaching further into the fuel system with every mile. About how far it had come is worth telling us. There is more to rinse out once your engine has been run, and we do all of it where your car has stopped. Permanent damage is very uncommon when it's caught soon. ## Emptying AdBlue in a diesel around Ferndown: what it takes A street by The Family, a driveway, a lay-by or a forecourt: anywhere your car has stopped around Ferndown, our engineers come to it. What was put in, roughly the quantity, and if the motor has been run: our technicians check before all else, since those shape the work. Next, draining the tank right there removes the polluted diesel along with the AdBlue together. The system is purged thoroughly, which counts more with AdBlue than with petrol, because what it leaves behind does not rinse out on its own. Testing your vehicle follows at the end, after clean diesel is added and the filter gets cleaned or, if needed, replaced. If the engine hasn't run, most jobs take about half an hour once we arrive. Explosion-proof pumps make a live forecourt sensible to work on, and they're quiet enough to spare the street at night. Bleeding your system with fresh diesel comes at the end. Firing it up comes next, and then you drive off from where the car is parked, outside Bournemouth or on a driveway around Ferndown. We make sure it runs properly on clean diesel before leaving. The whole job is done where your car is, so it never needs to be taken to a garage. Insurers ask for a VAT invoice and an engineer report, and both come at the end. ## About Ferndown itself Ferndown is a town in Dorset, situated inland at an elevation of 29 metres, approximately 19 miles from Salisbury and 90 miles from London. Ferndown has a population of around 13,686 people and is characterised by predominantly detached housing. Ferndown is near several local points of interest, including Tricketts Cross, St Leonards Farm Park, and West Parley. Ferndown's location in the South West region of England makes it a part of a larger rural and urban landscape. ## AdBlue drains across Ferndown and Dorset AdBlue jobs in Ferndown are passed to teams that serve the towns near it — Tricketts Cross, St Leonards Farm Park plus West Parley — and most of Dorset further out, across BH postcodes. If you are close to a boundary, or somewhere hard to explain, ring and ask instead of assuming. Ferndown is a town, and an on-site drain suits it: whether the vehicle is on a home drive, a residential street, a car park or a forecourt, our technicians drain it where it is, and so it never needs to be shifted to us. ## What does AdBlue in a diesel tank cost to sort out in Ferndown? There's no honest single quote, because the jobs aren't the same. The price moves first with how long, if at all, the motor has been running, and next with the quantity of AdBlue that went in. After that it turns on where your car is and whether a van can reach it safely, which is simpler on an open driveway than in a tight space behind Barrington Centre. Which fluid got in, what quantity, plus if the engine ran: every Ferndown call begins with precisely those, ahead of a quote, not afterwards. Given them, a range narrows to one firm figure. Our price is quoted on the call, before anyone sets off; settling up happens on the day, by card or by phone, with nothing upfront. Look at your insurance while we are on the way: plenty include misfuelling cover. ## In Ferndown and still next to your car? Leaving the vehicle alone is, then, the best move open to you. Motor off, keys out, ignition off. Phone 0333 366 0103: AdBlue, roughly how much, plus if it ran are everything our technicians ask. Petrol in Diesel takes over the rest across Dorset, Ferndown too.