--- title: Don't Start It: AdBlue in a Diesel Tank Collery canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/collery-cornwall/ location: Collery county: Cornwall latitude: 50.866990 longitude: -4.509630 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # AdBlue in a Diesel Tank in Collery? Don't Start It AdBlue in the diesel tank? Then leave the engine off — and the ignition too. AdBlue is urea dissolved in water. The harm begins once it's sucked through the lines — it will not ignite, and it won't blend with diesel. Caught before the motor has run, AdBlue in a diesel tank is usually a drain and a thorough flush, done where the vehicle is around Collery. Before you do anything else, ring 0333 366 0103. ## Those opening minutes: AdBlue in the diesel tank around Collery Do: - Take the keys out, so no one switches your ignition on. - If you're anywhere near moving traffic, put the hazard lights on. - Keep your receipt or the empty bottle, so you can tell us what was put in and about how much. - The van locates you quickest with a postcode starting EX23 9, or simply the name of a street nearby, so phone from the car. Things not to do: - Moving your car even a short way is no reason to start the motor. - Do not switch your ignition on. On many diesels that alone runs the fuel pump. - Pouring in more diesel does not help: AdBlue settles out instead of blending. - Keep the car where it is rather than driving it anywhere, even a short way up Atlantic Highway. - Draining the tank yourself by the road is not worth trying. Ask the attendants to help you move your vehicle away from the pumps if you're on a forecourt in Collery, whether it is the the nearest petrol station or elsewhere. At home, the car stays just where it is. ## What AdBlue does in a diesel tank Made for the exhaust, AdBlue has no business in the engine. From a dedicated reservoir it is fed straight to the exhaust, cleaning what the engine emits. Nothing in it is meant to pass through a fuel pump, and nothing in a fuel pump is built to handle it. It doesn't combine. Once it's poured into a tank of diesel, AdBlue acts not at all like fuel. Denser than diesel, it drops and pools underneath it — the very spot the pickup draws from. Easiest of all: a vehicle that had AdBlue in Bush last night and has not turned since. The AdBlue sits at the foot of the tank, undrawn — but it would be the first thing through once the motor runs, before any diesel at all. Two kinds of damage come from there. What remains when the water goes is urea, which forms crystals: they lodge in narrow channels and clog filters. Worse, it eats at some metals in a fuel system, and carries on until it is cleared out. A motor left sitting in Collery with AdBlue already in its lines is worse by the morning; one with AdBlue only in its tank isn't. The water in it does harm of its own: the high-pressure fuel pump and the injectors rely on diesel to lubricate them, and water offers them nothing. ## Why is AdBlue in a diesel commonly the bigger fault? Fill a diesel with petrol by mistake at the Morrisons, and this issue is thinned fuel. Mixed into the diesel and left still, it is no threat for now; running the motor does the harm. With AdBlue in a diesel, the liquid as such is plainly the wrong one. It can't simply be run through, because it does not burn. Nor can it be watered down, since it separates back out — and the next tankful will not clear away crystals or corrosion. So the flush counts for more with AdBlue, and trying your engine "to see", in the heart of Collery or out in Coombe, costs more than nearly any other slip. The same good news applies as with petrol. Anywhere across Cornwall the car has stopped, an unstarted engine means the AdBlue still inside the tank: the simplest part of any fuel system to clear. ## AdBlue in a diesel tank around Collery: how it ends up there It is not deliberate. Many cars have the AdBlue inlet beside the diesel inlet, occasionally under one flap, and muddling them up is easy in poor light. Usually it is not the filling station: a driver picks up a container driving home and pours it in outside the house. A couple of familiar ways account for the majority of them. The top-up gets hurried outside Kilkhampton Junior and Infant School, after your dash flashed with a warning as the kids were taken off. A bottle is poured in at the end of the day on a drive just off Penstowe Road. Else, in dim light outside the pub in the village, the car gets topped up by someone opening that flap for the first time. The least known cars see it the most — rentals, brand-new cars, fleet ones, and the spare car in a family with both fuels. Keep it switched off: that is the first step to an identical mistake, anywhere in Collery or the remainder of Cornwall you are. ## Collery: started the motor with AdBlue in the diesel tank? Then the AdBlue has left your tank. Given any running time, it travels to the high-pressure pump and every injector, having passed through the filter and lines. Watch for lumpy running, exhaust smoke, falling power, lights on your dash, or a cut-out — coming back from Colliery Wood, say, or midway across Collery. Stop when safe. Turn off. Leave the car off instead of restarting it to check. With each start, more of it is pulled through. Leave the M5, under 50 miles from Collery, at the first junction and park somewhere safe, rather than driving on. A quick hop across Collery to the car park by Penstowe Castle is one matter; driving for Plymouth, under 50 miles away, is another, since every mile carries the AdBlue deeper in. So distance counts. Let us know about how far it had come. Wherever your car came to a halt is where all of it gets done, even with more to clean out after your engine has been started. Lasting damage is very unusual when it is spotted soon. ## Draining AdBlue in a diesel in Collery: what it takes Our engineers come to your car, wherever it has stopped in Collery: a side street close to War Memorial, a drive, a lay-by or a forecourt. Which fluid went in, about the quantity, and whether your engine has turned over: we ask before all else, since those shape the work. Then that tank is emptied where the vehicle waits, so the contaminated fuel and the AdBlue come out together. Residue from AdBlue will not wash away by itself, so the whole system gets a careful flush, which matters much more with urea than with petrol. The filter is flushed, or replaced where it needs to be; fresh diesel goes in; and the vehicle is tested. Engine not run? In that case count on about half an hour on site for most jobs. Quiet enough for use outside a house at night, and fine on a working forecourt, our pumps are explosion-proof. Bleeding the fuel system with clean diesel comes at the end. After that our technicians fire it up and you drive off, whether from a parking bay at the nearest station or a driveway in Collery. It's checked on new diesel to confirm it runs smoothly before our engineers go. Our technicians do it all wherever the vehicle has ended up, and it never has to be taken to a workshop. At the end, there is the paperwork for your insurer: a VAT invoice plus a written report from the engineer. ## About Collery itself Collery is a small coastal locality in Cornwall, situated near the villages of Stibb and Kilkhampton. Collery sits at an elevation of 143 metres, overlooking the surrounding countryside and coastline. Collery is characterised by its predominantly detached housing stock, reflecting its rural setting. Collery is located approximately 37.9 miles from Plymouth, the nearest city. ## AdBlue drains in Collery and across Cornwall Throughout the EX postcode area, the vans answering AdBlue call-outs in Collery reach much of Cornwall as well, Stibb, Kilkhampton and Forda among them. Guessing doesn't help close to a border or somewhere hard to pin down; ring and ask. No towing is needed. In Collery, a coastal area, a mobile service works: your vehicle is drained where it stands, whether on a driveway, a side street, a parking area or a forecourt. ## AdBlue in a diesel tank in Collery: the cost of fixing it Each job differs, and so not one single quote would be fair. Three things change the cost: whether the engine has run and for how long, how much AdBlue was put in, and where the car is. That last one comes down to whether our van can get to it safely, and an open driveway is simpler than a tight space behind St James The Great. For that in mind, every call from Collery begins with the same trio — what went in, how much, if the engine ran — ahead of a figure. Once they are answered, a range becomes a single firm figure. You hear that quote by phone, before anyone sets off, and you pay on the day, by card or over the phone, with nothing upfront. As the van is travelling, check your insurance: plenty cover misfuelling. ## Collery: still beside the car? Then the most helpful thing you can do is nothing to the car. Keys out; engine and ignition off. Petrol in Diesel handles the rest, across Collery or wherever in Cornwall, once you phone 0333 366 0103 to say it's AdBlue, roughly how big an amount, and whether it ran.