--- title: AdBlue in a Diesel Tank Coleshill? Leave It Off canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/coleshill-warwickshire/ location: Coleshill county: Warwickshire latitude: 52.497340 longitude: -1.705520 service: AdBlue in a Diesel Tank updated: 2026-10-21 --- # Don't Start It: AdBlue in a Diesel Tank in Coleshill If AdBlue has gone into your diesel tank, leave your motor off and leave your ignition off. Water with urea mixed in it: that's AdBlue. It does not burn, it does not mix with diesel, and the harm it does begins when the system draws it in. In Coleshill, AdBlue in a diesel tank caught before your engine runs usually means a drain and a thorough flush, just where the car is. First, phone us on 0333 366 0103. ## What to do straight away, Coleshill: AdBlue in your diesel tank Do these: - So nobody can switch your ignition on, pull the keys out. - If you are anywhere close to moving traffic, put your hazards on. - Which product, and about how much amount? Save the bottle or the till receipt, and our engineers can know. - Call us from where you are. A postcode starting B46 3, or the name of the nearest street, brings our van to you without a search. Not to do: - No starting the engine — not for a second, not to shift your vehicle. - Don't switch the ignition on. On plenty of diesels that alone runs the fuel pump. - AdBlue doesn't mix in diesel — it separates out — so adding extra diesel won't thin it. - Leave it where it is instead of driving it anywhere, even a short stretch up High Street. - No draining it yourself, either, on the verge. Ask the attendants to help you roll your car away from the island if you're at a forecourt in Coleshill, whether it is the Gulf or somewhere else. At home, the car remains just as it was left. ## AdBlue in a diesel tank, and what it does there AdBlue is made for the exhaust, not your motor. Stored in a separate tank, it is squirted into the exhaust stream to treat the gases. A fuel pump is not designed to cope with it, and AdBlue was never intended to travel through one. Tipped in with the diesel, it keeps apart instead of blending — entirely different from fuel. It's heavier than diesel, and so it sinks and gathers at the bottom of that tank, which is where the pickup sucks fuel from. Once the pump runs, the AdBlue is first to be pulled through. Until then it sits beneath the diesel, which is why a car filled in Blyth End yesterday and not started stays the straightforward one, as long as nobody touches your key. Once it is pulled in, the harm comes in two forms. What remains once the water goes is urea, which forms crystals: they lodge in tiny passages and block filters. On top of that, it attacks some metals in the fuel system, and carries on till it is cleared out. Lines holding AdBlue mean harm by morning for a car parked around Coleshill. Just in that tank, it stays the same. Diesel lubricates the injection pump and each injector as it passes; water gives no lubrication, and that is a second form of harm. ## Why is AdBlue in a diesel regularly the bigger fault? Put petrol in a diesel at the Shell and you have an issue of thin fuel. Blended through the diesel and sitting still, it is harmless for now; using your engine is the harm. AdBlue in a diesel is a fault of the wrong substance altogether. It cannot just be run through, because it doesn't burn. Nor can it be thinned, because it splits again — and the next fill will not clear away deposits or corrosion. So the flush matters for more with AdBlue, and turning your key "to see", in the heart of Coleshill or out in Chelmsley Wood, costs more than almost any other mistake. The same good news applies as with petrol. Wherever in Warwickshire the vehicle has stopped, an unrun engine means the AdBlue still inside the reservoir: the simplest part of a fuel system to empty. ## AdBlue in a diesel tank in Coleshill: how it ends up there In dim light, two caps together — the AdBlue one and the diesel cap, occasionally behind one flap — may look the same. Nobody means it; many designs invite it. It mostly happens outside the house, from a container grabbed en route home, not at the filling station. The ways it occurs are few and familiar. Midway through the drop-off, the dashboard flags it up, and outside Coleshill Church of England Primary School the top-up is rushed. After work, a bottle is tipped in on a driveway near Lyon Court. Or the car is topped up in the car park outside The Red Lion, in poor light, by someone who has never opened that flap before. Hired vehicles, brand-new motors, company motors, or the spare car in a family with one of each: the least familiar cars see it most. Wherever you are around Coleshill or the rest of Warwickshire, it's the same slip and the same first answer: leave the vehicle off. ## Coleshill: started your engine with AdBlue in your diesel tank? Then the AdBlue has left that tank. It has been sucked through the fuel filter and your lines, and if your motor ran for any time, it has reached your high-pressure pump and the fuel injectors. Maybe coming back from The Croft, or part way across Coleshill, your engine may run lumpy, smoke, lose pace, flash your dash or stall. Stop when it is safe. Switch off. Leave the car off instead of testing it again. With each start, more of that is pulled through. Leave the M42, under a mile from Coleshill, by the first junction and park somewhere safe, rather than driving on. Every mile pushes the AdBlue deeper in. That's why crossing Coleshill to park beside Coleshill Library and a drive of under 10 miles towards Birmingham are very separate jobs. Roughly how far it had come is worth telling us. Wherever your car came to a stop is where all of it gets done, even with more to rinse out once the motor has been started. Lasting damage is very unusual when it is spotted soon. ## What emptying AdBlue from a diesel involves around Coleshill The vehicle stays where it is, whether that is a road beside Coleshill United Church, a driveway, a lay-by or a filling station around Coleshill, and our van travels to it. What went in, about the quantity, plus whether your motor has turned over: our technicians ask first, since those decide the work. The contaminated diesel and the urea come out as one when the tank is drained, right there. The system is purged thoroughly, which matters more with AdBlue than with petrol, since what it leaves behind does not rinse out on its own. Fresh diesel goes in once the filter is cleaned — or replaced, when it needs to be — and after that your car is tested. Not run? Then count on about half an hour on site for most jobs. The pumps are explosion-proof, fine on a working forecourt and quiet enough to use outside a house after dark. Bleeding your system with clean diesel comes last. At that point we start it and you drive off, whether from a parking bay by Coleshill Parkway or a drive in Coleshill. Before we leave, our technicians make sure it's running smoothly with fresh diesel in. The entire job is done where the vehicle 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 Coleshill itself Coleshill is a town in Warwickshire, situated on the River Cole, with a mix of semi-detached housing and other residential properties. Coleshill sits at an elevation of 104 metres, near the cities of Birmingham and Sutton Coldfield, and is close to nearby places such as Duke End, Gilson, and Chattle Hill. Coleshill has a population of approximately 5905 people and is located about 8.4 miles from Birmingham. Coleshill is also within commuting distance of London, being around 95.8 miles away. ## AdBlue drains across Coleshill and Warwickshire The vans that answer AdBlue call-outs in Coleshill also cover the places about it, Duke End, Gilson and Chattle Hill among them, and most of Warwickshire beyond, across the B postcode area. Phone and ask rather than guess if you're close to a county line, or somewhere tricky to explain. Wherever the vehicle stands — a drive at home, a side street, a car park, a forecourt — we empty it on the spot, and there's no need to bring it to us; which suits Coleshill, a riverside town, well. ## What AdBlue in a diesel tank costs to put right in Coleshill Every job is different, so no single price is fair. Three things move the cost: whether the motor has been running and for how long, how much AdBlue got in, and where the car is. That last one rests on whether our van can get to it safely, and an open drive is simpler than a tight gap behind St Peter and St Paul. Which fluid was put in, how much, and whether it ran: each Coleshill call opens by asking precisely those, ahead of a figure, never after. When those are answered, a range becomes one firm figure. You hear that quote on the phone, before anybody sets off, and you pay on the day, by card or by phone, with nothing upfront. While our engineer is on the way, check your insurance: many include misfuelling. ## Next to your car in Coleshill, still? Not touching your car is, then, the most useful move open to you. Motor off, keys out, ignition off. Petrol in Diesel takes over the remainder, in Coleshill or anywhere within Warwickshire, after you phone 0333 366 0103 to say it's AdBlue, roughly what quantity, and whether the engine ran.