--- title: Don't Start It: AdBlue in a Diesel Tank Flint Hill canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/flint-hill-durham/ location: Flint Hill county: Durham latitude: 54.884560 longitude: -1.745360 service: AdBlue in a Diesel Tank updated: 2026-10-22 --- # Don't Start It: AdBlue in a Diesel Tank in Flint Hill If AdBlue has got into your diesel tank, keep your motor off then leave the ignition off. AdBlue is urea mixed in water. Not like fuel, it neither ignites nor blends, and no harm happens until the motor sucks it round. If your engine has not run yet, AdBlue in a diesel tank is generally emptied and thoroughly rinsed where your car sits around Flint Hill. Before you do anything else, ring 0333 366 0103. ## AdBlue in your diesel tank in Flint Hill: the first few minutes Things to do: - Keys out — then nobody can switch anything on. - Hazards on, if moving traffic is at all near. - Which fluid, and roughly how much quantity? Save the bottle or the receipt, and our engineers can see. - Ring us from where you are. A postcode starting DH9 9, or the name of the nearest street, gets our van to you without a search. Never: - Do not start the engine, even for a moment to shift your car. - Turning the key to ignition by itself starts the pump going on plenty of diesels. Avoid it. - AdBlue doesn't mix in diesel — it separates out — so adding more fuel will not thin it. - Keep the vehicle where it is instead of driving it anywhere, even a short way up Flint Hill Bank. - Beside the road, don't attempt emptying it yourself. Rolling your vehicle away from the island is a job for staff to help with, wherever Flint Hill forecourt you are on, the Esso or any other. On your own driveway, do not move it at all. ## What AdBlue does in a diesel tank Made for the exhaust, AdBlue has no place in your engine. Its own reservoir keeps it, and from there it is fed into the exhaust, where it cleans the fumes. A fuel pump is not made to take it, and AdBlue was never supposed to go through one. Poured in with your diesel, it keeps apart rather than mixing — entirely unlike fuel. The pickup sucks fuel from the lowest part of the tank, and that's precisely where AdBlue settles: as it is denser than diesel, it sinks. A motor filled on a drive in Tantobie overnight and left unstarted is the simple one. Nothing has sucked the AdBlue up so far — but once your engine turns, that's what is pulled first, directly from the bottom of that tank. It causes two kinds of damage from there. As its water goes, the urea left behind crystallises, and the crystals block filters and settle in fine passages. And it is corrosive to some of the metals a fuel system is made from, so it keeps running on the parts it reaches for as long as it stays there. Where the AdBlue has reached the pipework, waiting overnight around Flint Hill leaves things worse. Inside your tank only, waiting does nothing. Water protects nothing. The high-pressure pump and every injector depend on diesel running past them, and so the water content damages them in its own right. ## Petrol or AdBlue in a diesel: why AdBlue is often worse Top up a diesel with petrol by mistake over at the Texaco, and the issue is diluted fuel. Damage just comes from driving on it. Mixed into your diesel and left inside that tank, it causes none. AdBlue in a diesel is a problem of the wrong substance altogether. It can't simply be run through, since it doesn't burn. It does not stay mixed, so it can't be diluted. And crystals and corrosion don't wash out with the next tank of fuel. That's why the flush counts more with AdBlue than with petrol, and why starting the engine "to see" costs more here than nearly anywhere else, whether the vehicle is in Dipton or the middle of Flint Hill. The same good news applies as with petrol. Clearing a tank is the easiest part on any fuel system, and without running, the AdBlue remains in there — wherever across Durham the vehicle has stopped. ## How does AdBlue end up in a diesel tank around Flint Hill? Nobody means to do it. The AdBlue filler on many vehicles rests right next to your diesel filler, at times under the same flap, and the two caps can look alike in poor light. Usually it is never the filling station: a driver buys a bottle driving home and tips it in at home. It tends to happen in a few familiar ways. Rushing, outside St Patrick's Catholic Primary School, Dipton, after a warning lamp flashed on during the school run, a parent tops up your car. After work, a bottle goes in on a drive close to North Road. Another version: dim light, a pub car park outside The Prince Of Wales, and a driver opening that flap the first time. It crops up most in a rental, a new car, a company vehicle, or the other motor in a family with both fuels — the vehicles people know least. Wherever in Durham, Flint Hill as well, the mistake does not change, and neither does the first step: leave it off. ## AdBlue in the diesel tank around Flint Hill, and your engine started? Then the tank is no longer where the AdBlue is. Given any running, it goes on to the injection pump and every injector, having passed through the filter and pipework. Perhaps returning from Deep Dene Local Nature Reserve, or midway across Flint Hill, your engine may go lumpy, smoke, drop power, light up the dash or cut out. Pull over when it is safe. Switch off. Leave the vehicle off rather than restarting it to check. Each start pulls more of it through. Leave the A1(M), under 10 miles from Flint Hill, at the next junction and park somewhere safe, rather than driving on. A quick hop across Flint Hill to the car park by St Patrick's Roman Catholic Church is one matter; heading for Newcastle upon Tyne, under 10 miles away, is something else, since each mile carries the AdBlue further in. So mileage counts. Tell us roughly how far it had come. Our engineers do all of the rinsing where the car has ended up, and once your engine has been run there is more of it. When it is caught soon, permanent damage is very uncommon. ## What does an AdBlue drain on a diesel involve in Flint Hill? Wherever it has come to rest around Flint Hill — a filling station, a lay-by, a driveway, a street by White Le Head Methodist Church — our van comes to your car. The job depends on three replies, which we get first — which fluid went in, the amount, and if your motor has turned over. On the spot, your tank is then drained, and both the polluted diesel and the urea come out as one. The system is flushed thoroughly, which matters more with AdBlue than with petrol, since what it leaves behind does not rinse out on its own. A test of the car comes at the end, once fresh diesel goes in and the fuel filter gets flushed or, where needed, replaced. Engine not run? In that case expect roughly half an hour on site for most jobs. Our pumping gear is explosion-proof, and so a busy filling station is no issue, and it's quiet enough for a residential street after dark. Bleeding the system with clean diesel comes at the end. Firing it up comes next, and then you set off from where the vehicle is parked, at Blaydon or on a driveway in Flint Hill. Before leaving, our technicians make sure it is running smoothly with clean diesel in. No garage is needed at any stage, with the entire job done on the spot. At the end, you are given the paperwork for your insurer: a VAT invoice plus a written report from the engineer. ## About Flint Hill Flint Hill is a suburban area situated on the riverside in County Durham, with a mix of semi-detached housing and a population of around 1887 residents. Flint Hill sits at an elevation of 239 metres, overlooking the surrounding countryside and nearby settlements like Mountsett and White-le-Head. Flint Hill is located near the city of Newcastle upon Tyne, approximately 8.4 miles away, and is part of the wider North East region. Flint Hill has a relatively high elevation compared to the nearby city, with the River Tyne flowing through the lower-lying areas. ## AdBlue drains around Flint Hill and across Durham AdBlue call-outs around Flint Hill are passed to teams that cover the places near it — Mountsett, White-le-Head as well as Clough Dene — and much of Durham beyond, across DH postcodes. Phone and ask rather than guess when you are by a border, or somewhere awkward to explain. Flint Hill is a residential suburb, and a call-out drain suits it: whether the vehicle is on a home drive, a residential street, a car park or a forecourt, our engineers drain it where it is, and so it never needs to be shifted to us. ## Flint Hill: what AdBlue in a diesel tank costs to fix Since the callouts differ, a single figure would not be honest. Whether your engine has been running, and for how long, comes first in what changes the cost. How much AdBlue got in comes next, and then the location of the vehicle, because an open drive is simpler for a van to reach safely than a tight space behind Tantobie Community Centre. That is why every call from Flint Hill starts with the same three questions, asked before giving a figure, not after: what was put in, how much, and if it has run. When those are answered, a range becomes one firm number. You get that price by phone, before anybody sets off, and you pay on the day, by card or over the phone, with nothing upfront. Look at your policy while we're on the way: plenty include misfuelling cover. ## Flint Hill: still next to the car? In that case, touch nothing — that is the best move available. Engine off, keys out, ignition off. Call 0333 366 0103 then tell us it is AdBlue, roughly how much, and if it's run. Petrol in Diesel takes it from there, in Flint Hill or anywhere in Durham.