--- title: AdBlue in a Diesel Tank Ham — Don't Start It canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/ham-devon/ location: Ham county: Devon latitude: 50.396820 longitude: -4.162390 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # Ham: AdBlue in the Diesel Tank? Leave It Off If AdBlue has gone into your diesel tank, keep your engine off and leave the ignition off. Urea dissolved in water is what AdBlue is. Being water-based, it will not ignite and won't blend with diesel; trouble just starts once the pump begins pulling it. A drain and a thorough flush, done where your car is in Ham, is generally what AdBlue in a diesel tank takes — if it is caught before the motor has run. Phone 0333 366 0103 before you do anything else. ## Your next steps right now, Ham: AdBlue in the diesel tank Things to do: - Remove the keys, which prevents someone switching the electrics on. - Close to moving traffic? Then put your hazards on. - So you can give us which fluid it was and roughly what quantity, save the till receipt or the empty bottle. - Call just where you are. Say a PL2 2 postcode or the nearest street name, and nobody has to search for you. Never: - Shifting the car just a short way is no reason to fire up the motor. - Do not switch the ignition on. On plenty of diesels that alone runs the fuel pump. - Pouring in extra diesel does not help: AdBlue separates out instead of blending. - Leave the vehicle where it is instead of driving it anywhere, even a short stretch along Ham Green Lane. - Do not try to drain the vehicle yourself at the roadside. Ask the attendants to help you roll your vehicle off the pumps if you are on a forecourt in Ham, whether it is the Esso or somewhere else. Parked on your own drive? Then it remains just where it is. ## What AdBlue does in a diesel tank Made for the exhaust, AdBlue has no place in your engine. Kept in a dedicated tank, it's injected into the exhaust stream to treat the fumes. 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 is tipped into the tank, AdBlue acts not at all like diesel. The pickup sucks fuel from the lowest part of the tank, and that is just where AdBlue settles: being denser than diesel, it sinks. When the system runs, the AdBlue is top of the list to go through. Until then it sits beneath the diesel, and that is why a car filled in Weston Mill yesterday and never started stays the straightforward case, as long as no one turns the key. Once it is drawn in, the harm takes two forms. What is left once the water evaporates is urea, which turns into crystals: they settle in narrow channels and clog filters. On top of that, it eats at some metals in a fuel system, and carries on till it is flushed out. Where the AdBlue is in the lines, leaving it overnight around Ham leaves things worse. In the tank alone, time costs nothing. Diesel protects the high-pressure pump and each injector as it flows; water gives no lubrication, and that is a second form of damage. ## AdBlue in a diesel: why it is often worse than petrol Petrol put into a diesel on Gulf's forecourt leaves the fuel thin — that is the whole issue. Damage only comes from driving on it. Mixed into your diesel and left in your tank, it does nothing. AdBlue in a diesel is a different matter: not thin fuel, but no fuel at all. It cannot just be run through, since it doesn't burn. It does not stay mixed, and so it cannot be diluted. And crystals and corrosion do not wash out with the next tank of fuel. That's why the flush matters more with AdBlue than with petrol, and why starting the engine "to see" costs more here than nearly anywhere else, whether your car is in Ford or the middle of Ham. As with petrol, there is good news. Never started? Then the AdBlue sits just inside the tank, the easiest section of the entire system to clear, anywhere the vehicle has come to rest around Devon. ## How does AdBlue end up in a diesel tank around Ham? It is not deliberate. Many cars have the AdBlue inlet beside the diesel one, now and then behind a single flap, and mixing them up is simple in poor light. Usually it is never the forecourt: a driver buys a container driving home and tips it in at home. Mostly, it happens in one of a few familiar ways. A warning light comes on during the school run, and the top-up takes place in a hurry outside Mayflower Academy. Someone tips the bottle in at home, right off Ham Drive, as the day ends. One more pattern: dim light, a pub car park by Beacon Park Social Club, and a driver opening that flap the first time. It happens most in the motors people know least: a hire car, a new car, a company car, or the second car of a household with one diesel and one petrol. Wherever around Devon, Ham as well, the mistake doesn't change, and nor does the first response: leave it switched off. ## Already started your engine with AdBlue in your diesel tank around Ham? In that case, the AdBlue is no longer inside the tank. It has been drawn through the filter and the fuel lines, and if your motor ran for any time, it has reached the high-pressure pump and the fuel injectors. Maybe coming back from Ham Woods Local Nature Reserve, or part way across Ham, your motor may run rough, smoke, lose pace, flash the dash or stall. Once safe, pull over and turn everything off — without turning it on again to see. With each start, more of it is pulled through. Ham sits under 50 miles from the M5; if you were on it, exit by the next junction and stop safely rather than driving on. How far it went counts. A couple of hundred yards across Ham to the car park by St James the Less is a very different job from a run towards Plymouth, under 3 miles away, with the AdBlue reaching further into the system with every mile. Approximately how far had it come? Tell us. Our engineers do all of the rinsing where the vehicle has ended up, and once the motor has been started there is more of it. If it's noticed soon, lasting damage is very rare. ## Clearing AdBlue in a diesel in Ham: what it takes Anywhere it has stopped in Ham — a filling station, a layby, a drive, a road beside Morice Baptist Church — our van comes to the car. Before anything else our technicians ask what was put in, about how much, and whether your motor has run, since those replies settle this work. Right there, that tank is then drained, and all of the contaminated diesel and the urea come out at once. Residue from AdBlue will not flush out by itself, and so the whole system gets a full flush, which counts far more with urea than for petrol. Testing your vehicle follows at the end, once fresh diesel goes in and the fuel filter is flushed or, where necessary, replaced. Not run? Then expect about half an hour once we are there for most jobs. The pumps are explosion-proof, safe on a busy forecourt and quiet enough to use outside a house at night. Clean diesel goes in to bleed the system, and that is the final step. At that point we start it and you set off, whether from a parking bay by Keyham or a drive in Ham. Before we leave, we confirm it's running correctly with new diesel in. No workshop is needed at any point, with the entire job done then and there. The insurer will want an engineer's report and the VAT invoice — each handed over once this job is done. ## About Ham, for a moment Ham is a suburban area in Devon, situated on the coast near Plymouth, with a mix of semi-detached housing and local amenities. Ham sits at an elevation of 54 metres, looking out over the sea, and is close to nearby places such as North Prospect and Pennycross. Ham is part of the larger Plymouth urban area, but retains a distinct local character. Ham has a population of around 7502 people, living in a variety of semi-detached homes. ## Ham and Devon: AdBlue drains across the area The vans that answer AdBlue call-outs in Ham also cover the spots around it, North Prospect, Pennycross and Camels Head among them, and most of Devon beyond, across the PL postcode area. Assuming doesn't help close to a county line or somewhere tricky to describe; ring and ask. No towing is needed. In Ham, a residential suburb, a mobile service works: the vehicle is drained on the spot, whether on a drive, a residential street, a car park or a forecourt. ## AdBlue in a diesel tank around Ham: the cost of fixing it Each job is different, and so no single quote would be honest. The cost shifts first with how long, if at all, the motor has been running, and next with the quantity of AdBlue that got in. After that it depends on where your car is and whether a van can reach it safely, which is easier on an open drive than in a tight gap behind Holy Family. For that reason, every enquiry from Ham begins by asking the identical trio — which fluid was put in, what quantity, whether it ran — ahead of a quote. Their answers narrow a range down to a single number. Quoted by phone before the van sets out, the job is settled that day — card or phone, no deposit. Misfuelling cover comes with plenty of insurance policies, so it pays to look at yours before the van arrives. ## In Ham and still beside the car? Then the most helpful thing you can do is nothing to your car. Keys out; engine and ignition off. Phone 0333 366 0103 then tell us it is AdBlue, about how much, and if it has run. Petrol in Diesel takes it from there, around Ham or anywhere across Devon.