--- title: AdBlue in a Diesel Tank Hillside — Don't Start It canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/hillside-somerset-ba3-2/ location: Hillside county: Somerset latitude: 51.280860 longitude: -2.494440 service: AdBlue in a Diesel Tank updated: 2026-10-19 --- # Don't Start It: AdBlue in a Diesel Tank in Hillside AdBlue in the diesel tank? Then keep the engine off — and your ignition as well. Urea mixed in water is what AdBlue is. The trouble starts once it's sucked through your lines — it won't burn, and it won't blend with diesel. In Hillside, AdBlue in a diesel tank caught before the motor runs normally comes down to a drain and a thorough flush, right where the car is. No step comes before calling 0333 366 0103. ## Hillside, AdBlue in the diesel tank: what to do at once Things to do: - Keys out — then no one can power anything on. - Hazards on, if moving traffic is anywhere near. - The empty bottle or the till receipt shows us the product and the amount, so don't throw it away. - Give us a postcode starting BA3 2, or whichever street is nearest, and the van reaches you straight — so call wherever you stand. Things not to do: - Don't start the engine, even for a moment to move the car. - Many diesels run their fuel pump the instant the ignition comes on, and so keep it off. - Do not top up with diesel to thin it. AdBlue doesn't mix in diesel; it separates out. - Any driving at all is to be avoided, even a short distance down Withies Park. - By the road, do not try emptying it on your own. Ask the attendants to help you move the vehicle off the pumps if you're on a forecourt in Hillside, whether it's the Esso or somewhere else. Stopped on your own driveway? Then it remains exactly where it is. ## What does AdBlue do in a diesel tank? Not your motor but your exhaust is where AdBlue belongs. From a separate reservoir it goes directly to your exhaust, treating what the motor emits. Neither side fits the other: urea doesn't belong in an injection pump, and a pump can't take urea. Fuel blends; AdBlue, once tipped in, will not. Its behaviour is not at all like diesel's. It drops, because it's heavier than diesel, and settles low where the intake draws its supply from. Easiest of all: one that got AdBlue in Hayes Park overnight and has not turned since. The liquid waits at the base of your tank, undrawn — though it would be the first thing through if the motor runs, before any diesel at all. Once it is sucked in, the harm comes in two forms. 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 components it reaches for as long as it stays there. If the AdBlue is in the pipework, leaving it till morning around Hillside makes things worse. In that tank alone, time does nothing. The water in it does damage of its own: the high-pressure fuel pump and the injectors rely on diesel to lubricate them, and water gives them nothing. ## AdBlue in a diesel: why it is frequently worse than petrol Put petrol in a diesel at the Tesco and you have an issue of thin fuel. It mixes with your diesel, and whilst it's inside your tank it does no damage; the damage comes from running the motor on it. With AdBlue in a diesel, the liquid as such is plainly the wrong one. It cannot just be run through, since it doesn't burn. Nor can it be thinned, since it splits again — and the next fill won't rinse away deposits or corrosion. So the flush counts more here, and turning the key "to see", in the centre of Hillside or out in Norton Hill, costs more than almost any other slip. The good news is the same as with petrol. If the motor has not run, the AdBlue is still in your tank, and your tank is the quickest part of a fuel system to clear, wherever in Somerset the vehicle is standing. ## How AdBlue ends up in a diesel tank around Hillside Plenty of cars place the AdBlue filler alongside the diesel cap, occasionally under one flap, and in dim light the two may appear the same. Nobody means it. A bottle bought while heading home and tipped in outside the house, rather than at the filling station, is the typical route. The ways it occurs are few and familiar. Midway through the drop-off, the dashboard warns, and outside Longvernal Primary School the top-up is rushed. Someone pours the container in at home, right off Chilcompton Road, as the day ends. One more pattern: dim light, the car park by Crossways Tavern, and someone opening that flap the first time. It crops up the most in a rental, a brand-new motor, a fleet car, or the spare vehicle in a home with both fuels — the cars drivers know the least. Wherever you are around Hillside or the rest of Somerset, it is the same error and the same first answer: leave the vehicle off. ## Already started the motor with AdBlue in your diesel tank in Hillside? In that case, the AdBlue is no longer inside the tank. It has been drawn through the fuel filter and your lines, and if your engine ran for any time, it has got to the high-pressure fuel pump and the injectors. Maybe coming back from Jack's Wood, or midway across Hillside, the motor might run lumpy, smoke, lose pace, flash your dash or stall. No restarting to check: pull over once safe, then turn everything off. More of that is pulled through with each start. If you were on the M32, under 15 miles from Hillside, come off at the next exit and stop somewhere safe rather than pressing on. Every mile carries the AdBlue deeper into your system. That's why a hop across Hillside to park beside Midsomer Norton and a drive of under 10 miles towards Wells are such different jobs. Roughly how far had it come? Tell us. Once the engine has been started, the flush takes in more, and all of it is done where the car has come to a stop. When it's noticed quickly, permanent damage is very uncommon. ## What draining AdBlue from a diesel involves around Hillside Our engineers come to your car, wherever it has stopped in Hillside: a side street near St John the Baptist, a drive, a lay-by or a forecourt. Before anything else we ask what went in, about how much, and if your engine has been run, because those replies determine this work. Next, draining your tank right there takes out the contaminated diesel along with the AdBlue in one go. A careful flush counts far more after AdBlue than after petrol, because residue won't wash out on its own. Your filter is cleaned, or replaced where it needs to be; fresh diesel goes in; and the vehicle is tested. Roughly half an hour on site is usual for most jobs where your engine has not run. Explosion-proof pumps make a busy forecourt safe to work on, and they're quiet enough to spare the neighbours at night. The last step is to bleed the system on new diesel. After that we fire it up and you drive off, whether from a parking space by Oldfield Park or a drive around Hillside. It's tested on fresh diesel to be sure it runs properly before our technicians go. Because the job is done in its entirety where your car is, a garage never comes into it. You receive a VAT invoice and an engineer report afterwards, which is what insurers want. ## About Hillside itself Hillside is a suburban area situated on the riverside in Somerset, with an elevation of 106 metres. Hillside lies near the city of Wells, approximately 8.3 miles away, and is close to other nearby places such as Riverside and Midsomer Norton. Hillside has a population of around 3926 residents and predominantly features semi-detached housing. Hillside is located in the South West region of England, about 103.2 miles from London. ## AdBlue drains across Somerset, Hillside included Over the BA postcode area, the vans taking AdBlue call-outs around Hillside serve much of Somerset as well, Riverside, Providence Place and Midsomer Norton among them. Ring and check instead of guessing when you are close to a county line, or anywhere awkward to explain. Hillside is a residential suburb, and a call-out drain suits it: whether your car is on a home drive, a residential street, a car park or a forecourt, our engineers drain it where it stands, and so it never needs to be moved to us. ## AdBlue in a diesel tank in Hillside: the cost of fixing it Each job is different, and so not one single price would be fair. Whether the motor has been running, and for how long, comes first in what changes the cost. How much AdBlue was put in comes next, and then the location of the car, because an open drive is simpler for a technician to reach safely than a tight space behind Midsomer Norton Children's Centre. Before any quote, not afterwards, each call from Hillside opens with three checks: the fuel, the amount, and whether it ran. Given them, the range narrows to one fixed figure. Priced on the call before the engineer heads out, it is settled on the day — card or phone, no deposit. Misfuelling cover comes with many insurance policies, so it is worth looking at yours before the van gets there. ## In Hillside and still alongside the vehicle? Then the most handy thing you can do is nothing to the car. Keys out; motor and ignition off. Call 0333 366 0103: AdBlue, the amount, plus if the engine ran are everything our engineers need. Petrol in Diesel handles the remainder across Somerset, Hillside included.