--- title: AdBlue in a Diesel Tank Wookey Hole — Don't Start It canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/wookey-hole-somerset/ location: Wookey Hole county: Somerset latitude: 51.223770 longitude: -2.670430 service: AdBlue in a Diesel Tank updated: 2026-10-12 --- # Don't Start It: AdBlue in a Diesel Tank in Wookey Hole AdBlue in the diesel tank? Then keep the engine off — and the ignition too. Chemically, AdBlue is simply urea in water. It does not burn, it does not mix with diesel, and the harm it does starts when your fuel system pulls it in. If the motor has not run yet, AdBlue in a diesel tank is normally emptied and thoroughly rinsed where your car stands in Wookey Hole. Before you do anything else, call 0333 366 0103. ## Wookey Hole, AdBlue in the diesel tank: what to do right away To do: - Take your keys out, so nobody switches your ignition on. - Put the hazards on if you are anywhere near moving traffic. - Which product, and about how much amount? Save the bottle or the till receipt, and our engineers will see. - The van locates you quickest with a postcode starting BA5 1, or simply the name of a street nearby, and so phone from the spot. Don't: - Not even briefly, and not to shift your car: the engine remains off. - Switching your key to ignition alone sets your pump running on plenty of diesels. Avoid it. - Don't top up with diesel to thin it. AdBlue does not mix in diesel; it separates out. - Even a short stretch down High Street is too far to drive the car. - Draining that tank yourself beside the road isn't one to try. Get the attendants to help you roll your car off the island if you are at a forecourt around Wookey Hole, whether it is the Esso or somewhere else. At your own driveway, do not move it at all. ## AdBlue in a diesel tank: what it does Made for the exhaust, AdBlue has no business in your engine. Its own tank holds it, and from there it's fed into your exhaust, and there it treats the fumes. A fuel pump is not made to cope with it, and AdBlue was never supposed to travel through one. It does not blend. Once it is tipped into a tank of diesel, AdBlue acts nothing like fuel. It is heavier than diesel, and so it sinks and gathers at the bottom of that tank, which is where the pickup draws fuel from. The first thing the system pulls through, after it runs, is the AdBlue. So a vehicle that had AdBlue poured in on a drive in Haybridge last night, and has not been started since, is still the straightforward case: the AdBlue is lying at the bottom of the tank, and nothing has drawn it in. Two kinds of harm come from there. What is left when the water goes is urea, which turns into crystals: they lodge in narrow passages and block filters. Worse, it attacks some metals in a fuel system, and carries on until it's cleared out. Lines carrying AdBlue mean damage overnight for a vehicle parked around Wookey Hole. Only in that tank, it stays stable. And there's the water: it brings no lubrication to the components that rely on it the most — the high-pressure pump and each injector. ## AdBlue in a diesel: why it's often worse than petrol An issue of thin fuel is what you end up with from fuelling a diesel with petrol from the BP. No damage is done as long as it sits put, blended into the diesel — only once the motor runs on it. AdBlue in a diesel is an issue of the wrong substance altogether. Since it doesn't burn, running it through is not an option. It does not stay mixed, and so it cannot be weakened. 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 motor "to see" costs more here than nearly anywhere else, whether the car is in Walcombe or the middle of Wookey Hole. With AdBlue, the good news is no separate from petrol. Emptying a tank is the simplest part on any fuel system, and with no start-up, the AdBlue remains in it — anywhere around Somerset the vehicle has stopped. ## Wookey Hole: how AdBlue ends up in a diesel tank Many vehicles put the AdBlue filler beside the diesel cap, occasionally under a single flap, and after dark the two may appear identical. No one means it. Most of the time it happens with a bottle bought on the way home and poured in on the drive, not at the forecourt. A couple of familiar ways account for most cases. Rushing, outside St Joseph and St Teresa Catholic Primary School, after a warning lamp flashed on during the school run, a parent tops up the car. In the evening, a container goes in on a drive near Milton Lane. Else, in dim light by Wookey Hole Club, your car gets refilled by someone opening that flap the first time. It happens most in the cars motorists know least: a hire car, a new car, a company car, or the second vehicle of a household with one diesel and one petrol. Wherever you are in Wookey Hole or the rest of Somerset, it is the same mistake and the same first answer: leave the vehicle off. ## Already started the motor with AdBlue in the diesel tank around Wookey Hole? If so, the AdBlue is no longer in your tank. The fuel filter and pipework have had it sucked through, and any running time carries it on to the injection pump and every injector. Rough running, smoke, dropping power, dashboard warnings or cutting out: any might appear, perhaps part way across Wookey Hole or returning from Ebbor Wood. When safe, stop then switch everything off — without restarting to see. More of it is pulled through with each start. If you were on the M5, under 15 miles from Wookey Hole, come off at the next junction and stop somewhere safe rather than pressing on. A quick hop across Wookey Hole to the car park by St Mary Magdalene is one matter; driving for Wells, under 3 miles away, is something else, because every mile pushes the AdBlue deeper in. So distance counts. Approximately how far had it come? Tell us. There's more to flush once the motor has run, and our technicians do all of it where your car has ended up. When it is caught soon, permanent damage is very unusual. ## Clearing AdBlue in a diesel in Wookey Hole: what it takes Anywhere it has stopped in Wookey Hole — a filling station, a lay-by, a drive, a street by Wookey Hole Community Hall — the van travels to the car. Before anything else our technicians ask what was put in, about how much, and if the engine has run, because those replies decide this work. Next, emptying the tank on the spot removes the polluted diesel and the AdBlue together. With AdBlue, far more than with petrol, flushing counts: the fuel system is flushed all the way through because what remains won't flush out by itself. A test of your vehicle comes last, after fresh diesel goes in and the fuel filter gets flushed or, if necessary, replaced. Roughly half an hour on site is usual for most jobs where your engine hasn't run. Explosion-proof pumps mean a live forecourt safe to work on, and they're quiet enough not to disturb the neighbours at night. Lastly, the system is primed with fresh diesel. You head off as soon as our technicians have started the car, and it makes no difference whether your car is on a drive in Wookey Hole or in a space by Castle Cary. The check before our engineers go is that it runs smoothly on new diesel. The entire job is done where the car is, so it never has to be taken to a workshop. Insurers want a VAT invoice and an engineer report, and both come at the end. ## About Wookey Hole, briefly Wookey Hole is a small village in inland Somerset, situated near the city of Wells and close to the nearby places of Lower Milton, Upper Milton, and Henley. Wookey Hole sits at an elevation of around 60 metres, with detached housing being the predominant type of accommodation in the area. Wookey Hole is located approximately 111 miles west of London, making it a relatively rural community in the South West region. Wookey Hole has a population of around 631 residents, according to recent estimates. ## Wookey Hole and Somerset: AdBlue drains across the area Our teams that answer AdBlue calls around Wookey Hole also cover the locations about it, Lower Milton, Upper Milton and Henley among them, and most of Somerset beyond, across the BA postcode area. Near a border, or anywhere tricky to explain? Asking beats assuming, so phone. Wherever the car sits — your driveway at home, a residential street, a parking area, a forecourt — our engineers drain it there, with no need to take it to us; which suits Wookey Hole, a rural village, well. ## What does AdBlue in a diesel tank cost to sort out in Wookey Hole? Because the callouts vary, a flat figure wouldn't be fair. The cost moves first with how long, if at all, your engine has been running, and next with the quantity of AdBlue that was put in. After that it rests on where the vehicle is and whether a van can reach it safely, which is easier on an open drive than in a tight space behind Wookey Hole Theatre. Before a quote, never afterwards, each call from Wookey Hole opens with three checks: the fuel, the amount, plus whether it ran. Once those are known, a range turns into a single fixed number. Before anyone heads out, you are told our price on the phone. Then you pay on the day, by card or by phone, with nothing in advance. Plenty of insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## Next to your car in Wookey Hole, still? Not touching the car is, right now, the most useful move open to you. Keys out; engine and ignition off. Petrol in Diesel takes over the rest, across Wookey Hole or wherever in Somerset, once you call 0333 366 0103 to say it's AdBlue, roughly how big an amount, and whether it ran.