--- title: AdBlue in a Diesel Tank Ashcott — Don't Start It canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/ashcott-somerset/ location: Ashcott county: Somerset latitude: 51.129120 longitude: -2.810630 service: AdBlue in a Diesel Tank updated: 2026-10-01 --- # Don't Start It: AdBlue in a Diesel Tank in Ashcott If AdBlue has got into your diesel tank, keep the motor off then keep the ignition off. Urea dissolved in water is what AdBlue is. Unlike fuel, it neither ignites nor blends, and nothing happens until the motor sucks it round. Caught before the motor has run, AdBlue in a diesel tank is normally a drain and a thorough flush, done where the vehicle is in Ashcott. Nothing comes before ringing 0333 366 0103. ## Your next steps straight away, Ashcott: AdBlue in your diesel tank Do: - Take the keys out, and so no one switches the ignition on. - Close to moving traffic? Then put the hazards on. - Which fluid, and roughly how much volume? Save the bottle or the till receipt, and our engineers can see. - Our van finds you fastest with a postcode starting TA7 9, or simply the name of a street nearby, so phone from the car. Don't do these: - Shifting the vehicle just a few yards is no reason to fire up the engine. - Don't switch your ignition on. On many diesels that alone runs the fuel pump. - AdBlue does not dilute in diesel — it separates out — so adding extra fuel will not weaken it. - Even a short stretch up Bath Road is too far to drive the car. - By the road, don't try emptying it on your own. On a forecourt in Ashcott, whether it is the Sainsbury's or another one, ask the attendants to help you roll the vehicle clear of the petrol pump. On your own driveway, don't move it at all. ## What does AdBlue do in a diesel tank? AdBlue is made for your exhaust, not the motor. It goes into its own tank and is sprayed into your exhaust gas to clean it. Nothing in it is supposed to pass through a fuel pump, and nothing in a fuel pump is designed to handle it. Tipped in with the diesel, it keeps apart rather than mixing — entirely unlike fuel. Denser than diesel, it sinks and pools below it — the very spot the pickup sucks from. When your system runs, the AdBlue is top of the list to be pulled through. Until then it sits beneath the diesel, and that is why a car topped up in Greinton last night and never started stays the straightforward one, as long as no one touches your key. Two kinds of damage follow from there. What remains when the water goes is urea, which turns into crystals: they lodge in tiny channels and clog filters. Worse, it attacks certain metals in a fuel system, and carries on until it's cleared out. Where the AdBlue is in the pipework, waiting overnight around Ashcott makes things worse. In your tank only, time does nothing. Water lubricates nothing. The high-pressure pump and each injector depend on diesel flowing through them, and so the water part harms them in its own right. ## Why is AdBlue in a diesel commonly the bigger issue? Petrol put into a diesel on Shell's forecourt makes the fuel watery — that's the main issue. No damage comes while it sits unused, mixed into your diesel — only once the engine runs on it. AdBlue in a diesel is a different matter: not thin fuel, yet no fuel at all. It cannot simply be run through, because it does not burn. It doesn't stay mixed, so it can't be weakened. And crystals and corrosion do not wash out with the next tank of fuel. That is why the flush counts more with AdBlue than with petrol, and why starting your engine "to see" costs more here than almost anywhere else, whether the car is in Shapwick or the middle of Ashcott. As with petrol, there's good news. Clearing a tank is the simplest part on any fuel system, and with no running, the AdBlue stays in there — wherever around Somerset your vehicle has stopped. ## How AdBlue ends up in a diesel tank in Ashcott Many motors put the AdBlue filler alongside the diesel one, occasionally under a single flap, and after dark the two can appear identical. No one intends it. Most of the time it occurs with a bottle bought on the way home and poured in on the drive, not at the pump. Mostly, it occurs in one of a few familiar ways. Halfway through the morning drop-off, the dashboard warns, and outside Ashcott Primary School the refill is rushed. A bottle is poured in at the end of the day on a drive just off Pedwell Lane. Or a driver unfamiliar with that flap refills your car after dark, parked in the car park outside Ashcott Inn. Rented vehicles, new cars, company cars, or the spare vehicle in a home with both fuels: the least known vehicles see it the most. Wherever you're in Ashcott or the remainder of Somerset, it is the same slip and the same first answer: leave it off. ## Already started the engine with AdBlue in the diesel tank around Ashcott? The AdBlue has left your tank, then. It's been pulled through the filter and your lines, and if your motor ran for any time, it has reached the high-pressure fuel pump and your injectors. Expect lumpy running, exhaust smoke, falling power, lights on your dash, or a stall — returning from Henhills Copse, say, or midway across Ashcott. When safe, pull over then turn it off — with no restarting to see. Each start pulls more of that through. Leave the M5, under 10 miles from Ashcott, at the first junction and stop somewhere safe, not driving on. Mileage matters: each mile pushes the AdBlue deeper in, and so heading towards Wells, under 10 miles away, gives a far larger job than crossing Ashcott to the car park by All Saints. 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 car has stopped. Caught early, it very seldom leaves lasting damage. ## Ashcott: how AdBlue is emptied from a diesel The car stays put, whether that is a street near The Blessed Virgin Mary, a driveway, a layby or a filling station in Ashcott, and our van travels to it. The job rests on three answers, which our engineers ask for first — what went in, the quantity, and if the engine has run. Right there, your tank is then drained, and both the contaminated diesel and the urea come out at once. Residue from AdBlue will not wash away by itself, and so the fuel system gets a careful flush, which matters much more with urea than for petrol. After that, your filter: cleaned, or changed if it must be. Then fresh diesel, and then a test of the car. Engine not run? In that case count on about half an hour on site for most jobs. The pumps are explosion-proof, safe on a busy forecourt and quiet enough to use outside a house after dark. The final step is to prime the system on clean diesel. You set off as soon as our engineers have fired it up, and it makes no difference whether the vehicle is on a drive around Ashcott or in a bay by Bridgwater. We make sure it runs correctly on new diesel before we go. Our engineers do it all wherever your car has stopped, and it never needs to go to a workshop. At the end, you are given paperwork for your insurer: a VAT invoice and a report from the engineer. ## About Ashcott, for a moment Ashcott is a small village in inland Somerset, situated near the towns of Wells and Glastonbury, at an elevation of around 45 metres. Ashcott lies within a rural area, surrounded by nearby places such as Pedwell, Berhill, and Buscott. Ashcott has a population of approximately 603 residents, with predominantly detached housing. Ashcott is located about 9 miles from Wells, the nearest city, and around 119 miles from London. ## AdBlue drains across Somerset, Ashcott included AdBlue call-outs in Ashcott are passed to teams that serve the places around it — Pedwell, Berhill as well as Buscott — and most of Somerset beyond, across TA postcodes. Guessing doesn't help close to a border or somewhere hard to pin down; ring and check. Anywhere your vehicle sits — a driveway at home, a residential street, a car park, a forecourt — our technicians drain it there, with no need to take it to us; which suits Ashcott, a rural village, well. ## What does AdBlue in a diesel tank cost to sort out in Ashcott? There is no honest single quote, because the jobs are not the same. Three things move the price: whether the motor has run and for how long, how much AdBlue went in, and where the car is. That last one comes down to whether a technician can get to it safely, and an open driveway is simpler than a tight gap behind Greinton Village Hall. Which fluid went in, how much, plus if it ran: every Ashcott call begins with exactly those, before any figure, never afterwards. Given those replies, a range shrinks to a single fixed number. Quoted on the call before the van sets out, the job is settled that day — card or phone, no deposit. As the van is travelling, dig out your insurance: many cover misfuelling. ## In Ashcott and still alongside your car? Then, the most helpful thing to do with your vehicle is to leave it. Engine off, keys out, ignition off. 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, in Ashcott or anywhere around Somerset.