--- title: Don't Start It: AdBlue in a Diesel Tank Medomsley canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/medomsley-durham/ location: Medomsley county: Durham latitude: 54.883430 longitude: -1.815930 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # Medomsley: AdBlue in the Diesel Tank? Leave It Off AdBlue in the diesel tank? Then leave your engine off — and the ignition too. Urea dissolved in water is what AdBlue is. Unlike fuel, it neither ignites nor blends, and no harm happens until your motor sucks it through. If your motor hasn't run yet, AdBlue in a diesel tank is usually emptied and carefully rinsed where the car stands around Medomsley. Before you do anything else, ring 0333 366 0103. ## What to do straight away, Medomsley: AdBlue in the diesel tank To do: - So nobody can switch your ignition on, take your keys away. - Close to moving traffic? Then put the hazard lights on. - So you can give us which liquid it was and roughly how much, keep your receipt or the empty bottle. - Call us from where you are. A postcode starting DH8 6, or the name of the nearest street, brings our van to you without a search. Do not: - No starting the motor — not for a second, not to reposition your car. - Many diesels run their fuel pump the moment your ignition goes on, so leave the car off. - No extra fuel added. The AdBlue will not blend, and so it is pointless. - Do not drive the car anywhere, not even a short way up Rothley Terrace. - Do not try to drain it yourself at the kerbside. At a forecourt around Medomsley, whether it is the Esso or another one, ask the staff to help you roll the vehicle away from the petrol pump. If you're on your own drive, leave the car precisely where it is. ## AdBlue in a diesel tank, and what it does there The motor is not what AdBlue is made for; your exhaust is. It goes into its own tank and is sprayed into your exhaust gas to fresh it. A fuel pump is not made to take it, and AdBlue was never intended to go through one. It does not combine. After it's tipped into a tank of diesel, AdBlue acts nothing like diesel. It is heavier than diesel, and so it sinks and gathers at the bottom of your tank, which is where the pickup sucks fuel from. Easiest of all: a vehicle that had AdBlue in Daisy Hill last night and has not turned since. The AdBlue sits at the base of that tank, undrawn — but it will be first through once your engine runs, ahead of any diesel at all. From there it causes two kinds of harm. What remains once the water goes is urea, which forms crystals: they lodge in tiny passages and clog filters. On top of that, it attacks some metals in a fuel system, and keeps going until it's flushed out. If the AdBlue has reached the pipework, waiting till morning around Medomsley leaves things worse. In the tank only, time does nothing. Then there's the water: it brings no protection to the parts that need it the most — the high-pressure pump and every injector. ## Why is AdBlue in a diesel frequently the bigger problem? Petrol pumped into a diesel on Tesco's forecourt makes the fuel watery — that is the whole issue. It mixes with the diesel, and whilst it's inside the tank it does no damage; the harm comes from running the engine on it. The trouble with AdBlue in a diesel is a totally wrong substance. It doesn't burn, so it cannot simply be run through. Whether the vehicle sits in High Westwood or the centre of Medomsley, firing it up "to see" does more harm with AdBlue than almost any other slip, and the flush counts more. Why: it will not remain mixed, and so diluting it fails; and crystals and corrosion outlast the next tankful. As with petrol, there is good news. Anywhere around Durham your vehicle has come to rest, an unrun motor leaves the AdBlue still in the reservoir: the easiest bit of any fuel system to empty. ## Medomsley: how AdBlue ends up in a diesel tank Plenty of vehicles put the AdBlue filler alongside the diesel cap, occasionally under one flap, and in dim light the two may look the same. No one intends it. It usually takes place outside the house, from a container grabbed on the journey home, not at the filling station. Mostly, it occurs in one of a couple of familiar ways. The refill gets hurried outside Bishop Ian Ramsey CofE Primary School, after the dash lit up with a warning while the kids were dropped in. After work, a bottle is tipped in on a drive close to Manor Road. Another pattern: dim light, the car park by The Royal Oak, and someone opening that flap for the first time. It occurs most in the vehicles drivers know least: a hire car, a new car, a company car, or the second vehicle of a household with one diesel and one petrol. Anywhere around Durham, Medomsley included, the mistake doesn't change, and neither does the first response: keep it switched off. ## Medomsley: started your engine with AdBlue in your diesel tank? Then your tank is no longer where the AdBlue is. It's been drawn through your filter and the fuel lines, and if your engine ran for any time, it has reached the high-pressure fuel pump and your injectors. You may notice your engine running roughly, smoking, losing power, showing warning lights or cutting out, maybe on the way back from Old Community Centre Site or halfway across Medomsley. Stop when safe. Turn off. Keep the vehicle off rather than testing it again. Each start pulls more of it through. Medomsley sits under 10 miles from the A1(M); if you were on it, exit at the first junction and pull up somewhere safe instead of driving on. A quick hop across Medomsley to the car park by Medomsley War Memorial is one thing; driving for Newcastle upon Tyne, under 15 miles away, is another, because every mile carries the AdBlue further in. So distance counts. Tell us about how far it had come. Once your engine has run, the flush takes in more, and all of it is done where the car has stopped. Long-term damage is very unusual if it is spotted quickly. ## What does an AdBlue drain on a diesel involve in Medomsley? A road by St Mary Magdalene, a drive, a lay-by or a filling station: wherever your vehicle has come to rest around Medomsley, our technicians come to it. Which fluid went in, roughly how much, and if your motor has been run: our engineers check first, since those decide the work. On the spot, that tank is then emptied, and both the contaminated diesel and the urea leave at once. The system is flushed thoroughly, which matters more with AdBlue than with petrol, because what it leaves behind does not rinse out on its own. Clean diesel goes in once your filter is flushed — or replaced, when it needs to be — and then your vehicle is tested. Most of these jobs are a half-hour visit once our technicians turn up, if your motor hasn't run. The pumping gear is explosion-proof, and so a busy forecourt is no issue, and it is quiet enough for a residential street after dark. Last, the system is primed with fresh diesel. After that we fire it up and you head off, whether from a parking bay outside Stocksfield or a driveway around Medomsley. We make sure it runs correctly on new diesel before leaving. The entire job is done where the vehicle is, so it never has to go to a garage. At the end, there is the paperwork for your insurer: a VAT invoice plus a written report from the engineer. ## About Medomsley, for a moment Medomsley is a village in County Durham, situated inland at an elevation of 239 metres, approximately 10.5 miles from Newcastle upon Tyne. Medomsley has a population of around 830 people and is characterised by terraced housing. Medomsley is surrounded by nearby places such as The Dene, Medomsley Edge, and Broom Hill, which form part of its local landscape. ## AdBlue drains across Durham, Medomsley included Our vans that answer AdBlue calls around Medomsley also cover the spots around it, The Dene, Medomsley Edge and Broom Hill among them, and most of Durham beyond, across the DH postcode area. If you are near a border, or somewhere hard to explain, ring and ask rather than guessing. Wherever your vehicle sits — your drive at home, a side street, a car park, a filling station — our engineers drain it there, with no need to bring it to us; that suits Medomsley, a rural village, well. ## AdBlue in a diesel tank in Medomsley: the cost of fixing it There's no fair single quote, since the jobs are not the same. Three things shift the price: whether the engine has been running and for how long, how much AdBlue went in, and where your car is. That last one rests on whether our van can reach it safely, and an open drive is easier than a tight gap behind Medomsley Methodist Church. For that in mind, every enquiry from Medomsley begins with the same trio — what went in, how much, whether it ran — ahead of any quote. Those answers turn a range into a straight price. Priced by phone before the engineer heads out, the job is settled that day — card or phone, nothing in advance. Misfuelling cover is part of many insurance policies, so it is worth looking at yours before the van gets there. ## Still next to the vehicle around Medomsley? Not touching the car is, then, the most useful thing you can do. Keys out; motor and ignition off. Say it's AdBlue, roughly how big an amount, and if the engine ran, on 0333 366 0103. From there Petrol in Diesel handles it, across Medomsley or wherever in Durham.