--- title: Don't Start It: AdBlue in a Diesel Tank Sloncombe canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/sloncombe-devon/ location: Sloncombe county: Devon latitude: 50.664390 longitude: -3.791260 service: AdBlue in a Diesel Tank updated: 2026-10-18 --- # AdBlue in a Diesel Tank in Sloncombe? Don't Start It With AdBlue in your diesel tank, the ignition remains off and so does your motor. AdBlue is urea dissolved in water. The trouble starts once it's pulled through the pump — it won't ignite, and it won't combine with diesel. If the motor hasn't run yet, AdBlue in a diesel tank is normally emptied and carefully cleaned where the vehicle sits in Sloncombe. Before you do anything else, call 0333 366 0103. ## What to do right now, Sloncombe: AdBlue in the diesel tank To do: - Remove the keys, and that prevents someone turning the power on. - If you are anywhere near moving traffic, put the hazard lights on. - So you can give us which liquid it was and about how much, save your receipt or the empty bottle. - The van finds you fastest with a postcode starting TQ13 8, or simply the name of a street close by, so call from the spot. Do not do these: - Don't start your motor, even for a moment to move the vehicle. - Do not switch your ignition on. On plenty of diesels that alone runs the fuel pump. - Pouring in more diesel doesn't work: AdBlue separates out instead of thinning. - Leave the car where it is rather than driving it anywhere, even a short way along A382. - No emptying it yourself, at all, on the roadside. Moving the vehicle away from the pumps is a job for attendants to help with, wherever Sloncombe forecourt you're on, the Esso included. On your own driveway, don't move it at all. ## What does AdBlue do in a diesel tank? Not your engine but the exhaust is where AdBlue belongs. From a dedicated tank it is fed directly to your exhaust, cleaning what your motor emits. A fuel pump is not made to cope with it, and AdBlue was never supposed to go through one. Inside a diesel tank it acts really differently from fuel. It does not mix in. The intake sucks fuel from the deepest part of the tank, and that is precisely where AdBlue ends up: as it is denser than diesel, it sinks. A car topped up on a driveway in North Bovey yesterday evening and not started since is the simple one. Nothing has sucked the AdBlue up yet — but when your engine runs, that is what goes first, straight from the bottom of your tank. From there it does two kinds of harm. What is left when the water goes is urea, which turns into crystals: they settle in narrow channels and clog filters. On top of that, it eats at certain metals in a fuel system, and carries on till it is cleared out. If the AdBlue is in the lines, waiting till morning in Sloncombe leaves things worse. In your tank alone, waiting costs nothing. Diesel protects the high-pressure pump and each injector as it flows; water offers none of that, and that is a separate kind of harm. ## Why AdBlue in a diesel is commonly more serious than petrol A problem of thin fuel is what you get after filling a diesel with petrol at the another forecourt nearby. It mixes with the diesel, and whilst it is in that tank it causes no harm; the harm comes from running the engine on it. The issue with AdBlue in a diesel is a totally wrong substance. It cannot simply be run through, because it does not burn. Whether your car is in Easton or the heart of Sloncombe, firing it up "to see" does more harm in this case than almost any other slip, and the flush counts more. Why: it will not remain mixed, and so diluting it is impossible; and deposits and corrosion outlast the next fill. With AdBlue, the good news is no different from petrol. If your engine has not run, the AdBlue is still in that tank, and your tank is the simplest part of a fuel system to clear, wherever around Devon the vehicle is sitting. ## How does AdBlue end up in a diesel tank in Sloncombe? After dark, two caps side by side — the AdBlue one and the diesel cap, occasionally behind one flap — can appear the same. Nobody intends it; plenty of layouts invite it. Most of the time it happens with a bottle bought on the way home and poured in on the driveway, not at the forecourt. The ways it happens are few and familiar. The refill gets hurried outside Moretonhampstead Primary School, after the dash flashed with a warning as the children were dropped in. In the evening, a bottle goes in on a drive near Court Street. Otherwise, after dark outside the pub in the village, the car gets refilled by a driver opening that flap the first time. Rented cars, brand-new cars, fleet motors, or the second vehicle in a home with one of each: the least known cars get it most. Keep it switched off: that's the first step to the same slip, anywhere in Sloncombe or the rest of Devon you are. ## Already started the engine with AdBlue in the diesel tank in Sloncombe? The AdBlue has left the tank, then. It has been drawn through the fuel filter and your lines, and if your motor ran for any time, it has got to your high-pressure pump and the fuel injectors. Maybe coming back from Bovey Castle Golf Course, or part way across Sloncombe, your motor may run lumpy, smoke, drop pace, light up the dash or cut out. No restarting to test: stop when it is safe, then turn everything off. With each start, more of that is pulled through. On the M5, under 15 miles from Sloncombe, the first junction is where to exit, and somewhere safe is where to stop — not carrying on. Hopping across Sloncombe to the car park by Meacombe burial chamber is one thing; driving towards Exeter, under 15 miles away, is something else, because each mile pushes the AdBlue deeper in. So distance counts. Roughly how far it had come is worth telling us. We do all of the flushing where your car has ended up, and once the engine has been started there is more of it. Very seldom does it leave lasting damage if it is spotted soon. ## Sloncombe: how AdBlue is cleared from a diesel The car stays put, whether that is a road near Cleave Farm (Ruin), a drive, a lay-by or a forecourt in Sloncombe, and the van comes to it. Which fluid got in, about the quantity, plus whether your engine has turned over: we check first, because those shape the job. The contaminated diesel and the urea leave together when that tank is emptied, right there. A full flush matters far more after AdBlue than after petrol, because residue will not clear out by itself. The fuel filter is cleaned, or replaced where it needs to be; clean diesel goes in; and your car is tested. If your motor has not run, most jobs take about half an hour once we arrive. Our equipment is explosion-proof, and so a live filling station is no issue, and it's hushed enough for a residential street late at night. Lastly, the fuel system is bled with fresh diesel. Whether it's a parking bay by Yeoford or a driveway in Sloncombe, that is where our engineers fire it up and you set off. Before we go, we confirm it's running correctly with clean diesel in. The whole job is done where your car is, so it never needs to be taken to a garage. You get a VAT invoice and an engineer report afterwards, which is what insurers ask for. ## About Sloncombe itself Sloncombe is a small locality in Devon, situated inland at an elevation of 177 metres, approximately 12 miles from Exeter. Sloncombe lies near the villages of Moretonhampstead and Great Weeke, and is characterized by its terraced housing. Sloncombe is part of a wider area of rolling hills and countryside in the South West region of England. Sloncombe is relatively distant from London, at around 169 miles away. ## AdBlue drains around Sloncombe and across Devon Throughout the TQ postcode area, the teams taking AdBlue jobs in Sloncombe reach most of Devon as well, Moretonhampstead, Batworthy and Great Weeke included. Near a boundary, or somewhere awkward to pin down? Asking is better than guessing, so phone. Sloncombe is a small village, and a mobile 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 stands, and so it never needs to be shifted to us. ## What does AdBlue in a diesel tank cost to sort out in Sloncombe? No flat figure could be honest, because every job is different. The price moves first with how long, if at all, your engine has been running, and next with the amount of AdBlue that got in. After that it depends on where your car is and whether our van can get to it safely, which is easier on an open driveway than in a tight gap behind Motor Museum. Ahead of a quote, never after, every call from Sloncombe begins with the same three questions: the fuel, the quantity, plus if the engine ran. When those are known, a range turns into a single firm figure. You get that quote on the phone, before anybody heads out, and you pay on the day, by card or by phone, with nothing upfront. As our engineer is travelling, check your policy: many cover misfuelling. ## Still beside your car around Sloncombe? In that case, do nothing — that's the most helpful move there is. Keys out, engine off, ignition off. Tell us it's AdBlue, about what quantity, and whether it ran, on 0333 366 0103. After that Petrol in Diesel takes over, across Sloncombe or wherever within Devon.