--- title: AdBlue in a Diesel Tank Colwinston? Next Steps canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/colwinston-the-vale-of-glamorgan/ location: Colwinston county: The Vale of Glamorgan latitude: 51.471710 longitude: -3.525670 service: AdBlue in a Diesel Tank updated: 2026-10-17 --- # AdBlue in the Diesel Tank in Colwinston: What Now? One fact matters above all once AdBlue is in a diesel tank, and it is whether the engine has run since. Not started yet? Then leave it that way, wherever your vehicle is — Colwinston or Treoes. Switch nothing on, phone 0333 366 0103, then expect a thorough flush plus a drain, done just where your vehicle sits in Colwinston. When the motor has been run, stop safely first, then turn the vehicle off. The job is bigger, yet the first stage is the same. Below: the cases our engineers see, anywhere across The Vale of Glamorgan. Pick yours. ## AdBlue in a diesel on a Colwinston forecourt Just now, bottle still in your hand, it dawns on you that the cap you took off was the wrong one, there at the pump. Anywhere in Colwinston, then — the nearest petrol station, BP, or somewhere else nearby. In short: there is no better place to be to discover it. Only your tank holds AdBlue; not one component beyond it has taken any in. Clearing the pump is no reason to start it — and so don't get back in. Three things: a shove into a bay with the attendants helping, the receipt saved, and a ring to us from where you stand. The equipment is explosion-proof and safe on a live forecourt, and so a car that cannot be pushed clear is drained where it is at the pump. ## Colwinston, at home: AdBlue in your diesel tank The warning light had been on for days. You bought a bottle, poured it in on the drive, and only when you put the empty bottle in the recycling did you look again at the cap. Just off Heol Cae Pwll is no less likely from any other place. In short: if your vehicle hasn't moved since, it is nearly equal to finding out at the pump. AdBlue does not mix with diesel; it sinks to the bottom of that tank and waits there. Overnight doesn't change that. What to do: leave your keys inside the house so nobody moves the car in the morning. Then ring. Your drive is where it is emptied, be it around Colwinston or Llampha. Late-night clears beside a house are fine: the pumps are low-noise. ## Drove off with AdBlue in a diesel in Colwinston? A short way beyond filling up, the motor started misbehaving: rough running, smoke, less power, warnings on the dash. Perhaps it was on Beech Park, maybe on the way out towards Cardiff, under 25 miles away. The upshot: the system has drawn AdBlue in by now. The injection pump and each injector see it as well on a bigger run, once the filter and lines have it. More miles, more starts: further it travels. Your move: stop somewhere safe, then turn the motor off. On the M4, under 5 miles from Colwinston, that means the next junction, not the services further on. Don't restart the car to see if it has cleared; it will not have. Call, and say what distance your vehicle was driven. ## AdBlue in the wrong tank of a hire, lease or company car You have just driven the car a week. Your own car either does without AdBlue or puts it elsewhere, and so nothing told you the AdBlue inlet was just next to the diesel. Anyone, wherever in The Vale of Glamorgan, might make it. The point: just as above, divided by if it ran, only with an added stage. Many hire and fleet contracts need the owner's approval before work. Your move: rental firm or your fleet manager to begin with, us next, since sorting it early saves time. Leave it switched off as the reply arrives, whether you're waiting at Bridgend or close to Colwinston Community Centre. ## Not sure it was AdBlue in your diesel tank, Colwinston? Occasionally the honest answer is "I think so". Too light, the bottle; a hint of ammonia round the filler; no clear recollection of the cap. Look familiar? Maybe it happened in a hurry at the school gates at the local primary school, or on a friend's drive in Pentre Meyrick. Put simply: a spill near the filler leaves the motor no harm. Once it is inside your diesel tank, though, that changes. Any AdBlue in the tank would be sucked in by turning on your car, and the start wouldn't settle which it is in any case. Do this: act as though it did, and don't start your motor. Phone with the details: we'd rather find a tank free of AdBlue than drain one after your engine has run. ## What every AdBlue drain in Colwinston has in common Each situation gets the same opening to the work. Forecourt, drive, The Sycamore Tree Inn's car park or a street beside Llandow Village Hall — our van reaches the vehicle, and three answers come next: which liquid, which amount, and whether it ran. Your price is given on the call, ahead of anyone setting off, and the replies set the work. AdBlue crystallises and eats at some metals used in fuel systems, and so it does not wash out on its own; that is why the flush, after this drain, counts much more with AdBlue than with petrol. Next comes your filter — flushed, or replaced when necessary — followed by fresh diesel, and a test of your vehicle. Where the engine has not been started, allow roughly half an hour on site, in most jobs. Finally, we fire it up. With clean diesel in, it runs while we confirm it is running properly, and then we head off. If it is caught quickly, the car very rarely has permanent damage, and the entire job happens where it 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 cover misfuelling, so look at yours while the van travels. ## About Colwinston itself Colwinston is a small village in the Vale of Glamorgan, situated near the riverside at an elevation of 72 metres. Colwinston lies close to the nearby villages of Llampha, Llangan, and Llandow, and is approximately 15 miles from Cardiff. Colwinston has a population of around 619 people, predominantly living in detached housing. Colwinston is also within commuting distance of major cities, with London being around 146 miles away. ## AdBlue drains about Colwinston and across The Vale of Glamorgan Throughout CF postcodes, the vans covering Colwinston — a village — work nearby places too, Llangan and Llandow included. Giving us a CF71 7 postcode pins you quickest of all. No moving is needed, whether parked centrally in Colwinston or in a layby en route to Splott Plantations, so leave it put. Wherever it stands, that is where it gets cleared. Tricky to explain? By St. Tydfil's Church or a border? Checking beats assuming, and so phone. ## Your scenario, in one line Unstarted? Leave the car that way and phone. Run by now: pull over, switch down, ring 0333 366 0103. Petrol in Diesel takes over the remainder, within Colwinston or anywhere across The Vale of Glamorgan.