--- title: Forty Hill: AdBlue in a Diesel Tank, What Next canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/forty-hill-greater-london/ location: Forty Hill county: Greater London latitude: 51.665820 longitude: -0.073680 service: AdBlue in a Diesel Tank updated: 2026-10-12 --- # AdBlue in the Diesel Tank in Forty Hill, and What to Do Next What to do about AdBlue in a diesel tank depends on one thing more than any other: whether the engine has run since it was put in. Over in Chase Village or here in Forty Hill, an unstarted motor must stay unrun. Keep nothing on, ring 0333 366 0103, then count on a thorough flush after a drain, done right where your car stands around Forty Hill. If it's run, stop as soon as it is safe then switch off. A bigger job, yes, but the same first move. Compare your case to one of the ones below, anywhere in Greater London you happen to be. ## On a Forty Hill forecourt with AdBlue in a diesel The cap you unscrewed was the wrong one — and you only spot it while you're stood at the pump, bottle or nozzle in hand. Somewhere around Forty Hill, then — Esso, Fairways, or somewhere else close by. Put simply: there is no better place to be to spot it. The AdBlue is in your tank and nowhere else. Nothing has sucked it in. What to do: do not get back in and start the vehicle to clear the petrol pump. Ring us from the forecourt after your vehicle is in a bay — the attendants will lend a hand to roll it — then keep the bottle. If it can't be moved, it can be drained at the petrol pump: the equipment is explosion-proof and safe on a working forecourt. ## At home around Forty Hill with AdBlue in the diesel tank On the dash, a warning had shown for days. A bottle from the garage, tipped in at the drive — and it was just at the recycling that the cap got a second look. It happens on driveways just off Baker Street as often as anywhere. The point: no miles since leaves it almost equal to finding it at the petrol pump. Diesel and AdBlue stay apart: the AdBlue settles to the floor of that tank and remains there, no matter how long the night. Your move: keys indoors, so no one takes the car anywhere first thing. After that, phone. Out in Enfield Town or here around Forty Hill, the drain is done at your drive. Our equipment runs quietly enough not to disturb the street at night. ## On the road in Forty Hill with AdBlue in a diesel Rough running, smoke, falling power or a lit dashboard started a short way beyond the top-up. Burnham Close, perhaps, or the route to London — a trip of under 15 miles. The point: the system has pulled AdBlue in by now. Mileage sets how deep it gets: filter and pipework first, then the injection pump and every injector. More miles, more starts: deeper it goes. What to do: pull over where it is safe then switch off. Exit at the next junction — not the services further along — if you are on the M25, under 3 miles from Forty Hill. Starting it again to test gets nothing — AdBlue never clears itself. Let us know the distance covered when you ring. ## Hire, lease or company car with AdBlue in the wrong tank It's a motor you have had for a week. On your own vehicle, AdBlue is absent or elsewhere. On this one, its cap is right next to the diesel inlet — news to you. Anyone, wherever in Greater London, might make the same. What it means: the same as the situations above, depending on whether it's run, with one more step. Work on the vehicle often needs the owner's approval under hire or fleet agreements. Settling it before we arrives is faster, so phone the rental company or your fleet manager, and then us. Stuck by The Salvation Army - Enfield or outside Gordon Hill till someone answers, the vehicle remains turned off throughout. ## Unsure about AdBlue in the diesel tank in Forty Hill? "I think so" is sometimes as honest answer there is. Too light, the bottle; a trace of ammonia near the filler; a hazy memory of which cap. Sound familiar? A hurried top-up by the gates of Lavender Primary School, or a call to a friend in Enfield Highway: either fit. Put simply: a spill round the filler leaves your engine no harm. AdBlue inside the diesel tank does. If there is AdBlue in the tank, starting the vehicle will suck it in, and it would not tell you which either. Assume it got in, and don't start the key. Call us and describe what you saw; we'd rather check a tank that turns out clean than drain one that has already been run. ## Forty Hill: what every AdBlue drain has in common Every case gets the same start to the job. We come to the vehicle, whether it is at a forecourt, a driveway, the car park at The Hop Poles or a side street close to Forty Hall Museum, and ask three things: what was put in, about how much, and if the motor has been run. Those replies decide this work, and you hear the quote on the phone, before anyone heads out. Then that tank is cleared and your system flushed thoroughly, which counts more with AdBlue than with petrol: AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it does not rinse out on its own. Then comes your filter — cleaned, or replaced where necessary — followed by clean diesel, and a test of the vehicle. If the engine hasn't run, the majority of jobs take about half an hour once we're there. The final step is firing it up. Our check that it runs properly on new diesel comes before we head off. Lasting damage is very uncommon when it's noticed soon, and the entire job is done where your car is. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Plenty of insurance policies include misfuelling cover, and so it is worth checking yours whilst we are on the way. ## About Forty Hill and where it is Forty Hill is a suburban area in Greater London, situated near the River Lea and close to Enfield Town. Forty Hill has a mix of terraced housing and other residential properties, with the area being approximately 11 miles from central London. Forty Hill sits at an elevation of around 36 metres, with nearby Bulls Cross and Enfield also being part of the local community. Forty Hill is home to around 8365 people, according to recent estimates. ## Forty Hill and Greater London: AdBlue drains across the area Bulls Cross and Enfield get the same vans as Forty Hill, a residential suburb, along with other places over EN postcodes. Quickest of all: a EN1 3 postcode for your location. Central Forty Hill or a layby near Aldersbrook Avenue Recreation Ground: wherever it is, your car doesn't need to shift an inch for us. Our van drains it where it stands. Assuming doesn't help beside The Scratching Post Charity Shop Rescue & Shelter Appeal for Cats, on a county line or anywhere hard to describe; phone and check. ## Your situation, in one line Not run yet: keep the car off and ring. Already run: stop, switch off and ring. Either way, Petrol in Diesel takes it from there in Forty Hill and anywhere across Greater London on 0333 366 0103.