--- title: Don't Start It: AdBlue in a Diesel Tank Little Knowle canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/little-knowle-devon/ location: Little Knowle county: Devon latitude: 50.634670 longitude: -3.323480 service: AdBlue in a Diesel Tank updated: 2026-10-02 --- # AdBlue in the Diesel Tank in Little Knowle? Keep It Switched Off With AdBlue in your diesel tank, the ignition stays off and so does your motor. In plain terms, AdBlue is simply urea in water. As it is water-based, it won't burn and won't blend with diesel; damage only starts once your pump begins drawing it. In Little Knowle, AdBlue in a diesel tank found before the motor runs usually comes down to a drain and a thorough flush, just where your car is. No step comes before ringing 0333 366 0103. ## Little Knowle, AdBlue in your diesel tank: what to do straight away Things to do: - Take your keys out, and so nobody switches the ignition on. - Near moving traffic? So put the hazard lights on. - So you can tell us which liquid it was and roughly what quantity, save the receipt or the empty bottle. - Ring right where you are. Quote a EX9 6 postcode or the closest street name, and no one has to hunt for you. Do not: - No starting the motor — not briefly, not to shift the car. - Don't switch the ignition on. On many diesels that alone runs the fuel pump. - Pouring in more diesel doesn't help: AdBlue settles out instead of blending. - Don't drive the car anywhere, not even a short way along Copp Hill Lane. - Beside the road, do not attempt draining it yourself. Rolling your car away from the island is a job for attendants to help with, wherever Little Knowle forecourt you're on, the Pace included. At home, your car stays just where it is. ## What does AdBlue do in a diesel tank? Made for your exhaust, AdBlue has no business in the motor. Stored in a separate tank, it's injected into the exhaust stream to treat the gases. Neither side fits the other: urea doesn't belong in an injection pump, and a pump can't deal with urea. It doesn't blend. Once it is tipped into a tank of diesel, AdBlue behaves nothing like fuel. It drops, since it's heavier than diesel, and pools down where the pickup draws its fuel from. When the system runs, the AdBlue is first to go through. Until then it waits beneath the diesel, and that is why a car filled in East Budleigh last night and not started remains the straightforward case, as long as nobody touches the key. Once it's drawn in, the harm takes two forms. What remains when the water evaporates is urea, which turns into crystals: they settle in tiny channels and clog filters. Worse, it eats at certain metals in the fuel system, and carries on until it is flushed out. A motor left standing around Little Knowle with AdBlue already in its lines is worse by the morning; one with AdBlue just in its tank is not. Diesel protects the injection pump and each injector as it passes; water gives no lubrication, which is a second form of harm. ## Why AdBlue in a diesel is often more significant than petrol An issue of thin fuel is what you get from fuelling a diesel with petrol from the East Budleigh Garage. No damage comes as long as it stays unused, blended into your diesel — only when your motor runs on it. The trouble with AdBlue in a diesel is a totally unsuitable substance. It cannot just be run through, because it does not burn. Nor can it be thinned, because it separates back out — and the following fill will not rinse away deposits or corrosion. So the flush matters more here, and turning your key "to see", in the centre of Little Knowle or out in Yettington, costs more than nearly any other mistake. The good news is the same as with petrol. If your motor hasn't run, the AdBlue is still in your tank, and the tank is the quickest part of a fuel system to clear, wherever across Devon the vehicle is standing. ## AdBlue in a diesel tank in Little Knowle: how it ends up there Nobody means to do it. The AdBlue filler on many motors sits right next to your diesel filler, occasionally under the same flap, and the two caps can look alike in poor light. Most of the time it happens with a bottle bought on the way home and poured in on the driveway, not at the pump. Mostly, it takes place in one of a couple of familiar ways. A warning light comes on during the school run, and the top-up takes place in a hurry outside St Peter's Church of England Primary School. In the evening, a container is tipped in on a driveway close to Bridge Road. Or a driver new to that flap tops up your car in dim light, stopped in the car park by The Salterton Arms. It crops up most in a rental, a brand-new vehicle, a fleet car, or the spare car of a home with one of each fuels — the vehicles people know least. Keep it off: that is the first response to the same mistake, anywhere in Little Knowle or the rest of Devon you are. ## Little Knowle: started the motor with AdBlue in your diesel tank? Then that tank is no longer where the AdBlue is. It has been pulled through your filter and the lines, and if the engine ran for any time, it has reached your high-pressure pump and the fuel injectors. Rough running, smoke, lost power, dashboard warnings or stalling: each may appear, perhaps midway across Little Knowle or returning from Greenway Lane Play Area. Once safe, pull over and switch everything off — without restarting to test. Each start pulls more of that through. If you were on the M5, under 10 miles from Little Knowle, come off at the next junction and stop somewhere sensible rather than pressing on. How far it went matters. A few hundred yards across Little Knowle to the car park by Budleigh Salterton Croquet Club is a very different job from a run towards Exeter, under 15 miles away, with the AdBlue reaching further into the fuel system with every mile. About how far it had come is worth telling us. Wherever your car came to a halt is where all of it gets done, even with more to clean out after the motor has been started. Very seldom does it leave lasting damage if it is spotted quickly. ## What does an AdBlue drain on a diesel involve in Little Knowle? A road beside Dr H J Carter, a driveway, a lay-by or a filling station: anywhere the car has stopped around Little Knowle, we travel to it. Three replies decide the job, and so before anything else we ask what got in, roughly the amount, plus whether the engine has run. Right there, the tank is then drained, and both the polluted diesel and the urea leave at once. The fuel system is cleaned thoroughly, which counts more with AdBlue than with petrol, since what it leaves behind does not rinse out on its own. A test of your vehicle comes last, once clean diesel goes in and your filter is cleaned or, where necessary, swapped. Roughly half an hour once we arrive is usual for most jobs where your motor hasn't run. Quiet enough for use outside a house at night, and safe on a busy forecourt, our pumps are explosion-proof. Fresh diesel goes in to bleed your system, and that's the last step. Whether it is a parking bay by Exmouth or a drive around Little Knowle, that is where our engineers start the car and you drive off. It is checked on fresh diesel to be sure it runs smoothly before our engineers go. Since the job is done in its entirety where the vehicle is, a garage never comes into it. At the end, you are given paperwork for the insurer: a VAT invoice plus a report from the engineer. ## About Little Knowle and where it is Little Knowle is a coastal locality in Devon, situated near the towns of Budleigh Salterton and Knowle, with Kersbrook to the east. Little Knowle lies at an elevation of 39 metres, close to the South West Coast, and is approximately 11 miles from the city of Exeter. Little Knowle has a population of around 1891 residents, predominantly living in detached housing. ## AdBlue drains across Little Knowle and Devon Our vans that answer AdBlue jobs in Little Knowle also cover the locations about it, Kersbrook, Budleigh Salterton and Knowle among them, and most of Devon beyond, across the EX postcode area. Guessing won't help by a border or anywhere tricky to pin down; phone and ask. No moving is needed. In Little Knowle, a coastal area, a van that comes to you fits: your vehicle is drained where it stands, be it on a driveway, a side street, a car park or a filling station. ## AdBlue in a diesel tank around Little Knowle: the cost of fixing it There is no fair single price, since the jobs are not the same. Whether your engine has run, and for how long, comes first in what shifts the price. How much AdBlue was put in comes next, and then the position of the car, because an open driveway is easier for a van to get to safely than a tight space behind Church on the Green. For that reason, every enquiry from Little Knowle begins by asking the same trio — what got in, what quantity, if it ran — before any figure. The replies turn a range into a straight price. Quoted on the call before the engineer heads out, it is settled on the day — card or phone, no deposit. As our engineer is on the way, dig out your insurance: plenty cover misfuelling. ## Next to the car around Little Knowle, still? Then the most handy thing you can do is nothing to your car. Keys out, engine off, ignition off. Tell us it's AdBlue, roughly how big an amount, and whether the engine ran, on 0333 366 0103. After that Petrol in Diesel takes over, in Little Knowle or anywhere within Devon.