--- title: AdBlue in a Diesel Tank Haydon? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/haydon-somerset/ location: Haydon county: Somerset latitude: 51.283600 longitude: -2.450080 service: AdBlue in a Diesel Tank updated: 2026-10-22 --- # AdBlue in a Diesel Tank in Haydon: How It Occurs and How to Prevent It Leave your motor and ignition off and ring 0333 366 0103 now — reading can wait when AdBlue is already in the diesel tank. In Haydon, catching it before the engine runs normally leaves a drain and a thorough flush where it stands. The remainder of this page explains why it happens and how to make sure it doesn't — useful if you are reading before it has happened. ## Two fillers, two tanks: AdBlue in a diesel vehicle Diesel feeds your motor — but many modern diesels driven around Haydon and Radstock carry a second liquid too. Your exhaust, not the engine, is where AdBlue ends up: dosed into the fumes to fresh it, from its own tank. There is a filler for every tank. Under one flap, next to each other: that's the arrangement on a lot of motors. Elsewhere, AdBlue's filler is beneath the bonnet or in the boot instead. Diesel gets filled at every forecourt visit, week in, week out. Seldom filled, AdBlue normally comes from a bottle, poured by a driver who must stop and think which filler it needs. That gap is where the mistake lives. ## How AdBlue in the diesel tank happens in Haydon Carelessness rarely causes it. Instead is three things coming up at once. Hurry follows from the warning. Your car warns you as AdBlue runs low, and an empty tank puts it into limp mode — so the top-up gets done quickly, before work on a driveway off Colliers Way, or heading home in the car park at The Railway. Then your car is unfamiliar. A hire car, a new motor or a company car puts the fillers where your last one didn't, and your hand gets to for the cap it would have used on the old one. Lastly, the bottle fits: diesel filler or AdBlue filler, it goes in just as easily, and after the tip begins, no part stops it. Fox Hills or the heart of Haydon: it takes the same few seconds in both. ## How to tell the AdBlue filler from the diesel one Look at these first, on a forecourt in Haydon or a drive over in Southfield. Seconds, that's all. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". Your diesel cap normally isn't. Read it instead of going by position. - On plenty of cars, size tells: AdBlue gets the smaller filler neck. - Check inside the fuel flap: many vehicles have a label there saying which fuel goes where. - Can't find it next to your diesel filler? Then check beneath the bonnet or inside your boot — the owner's manual will say where. - The previous driver knows. Check when you pick up a rental or company car — from Frome's car park, perhaps — rather than once the warning appears. ## Topping up AdBlue without it reaching the diesel tank Anywhere across Somerset the light comes on, this is a routine for the day. - Turn off once parked — level ground, engine off, and not rushed by Haydon Gate on the verge. - Locate the AdBlue filler, read the cap, and speak the name "AdBlue" aloud as you unscrew it. It sounds silly. It works. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Pour slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Close the cap and check again. Make sure the diesel cap was never opened. Only then start your car. If at stage two or three you find you have already poured into the diesel side, stop there. Never carry on to stage five. ## AdBlue in the diesel tank already, around Haydon? What follows is a short order of things, beginning with no starting your motor. Leave the ignition off as well, since on plenty of diesels it by itself starts your pump. AdBlue doesn't mix with diesel — it sinks to the bottom of your tank, where your fuel is sucked from — so do not top up with diesel to thin it. The staff at Shell, Esso or any forecourt will normally help to push your car clear if you ask. Your own driveway around Haydon is where it should stay. Already run? Pull over once it's safe, then turn off. Leave the M32 — under 15 miles out of Haydon — at the first exit. Mileage counts — a quick hop across Haydon is a smaller job than driving under 10 miles towards Bath — so tell us roughly how far it went. ## What happens when our engineers turn up in Haydon Our van comes to the car wherever it stopped — your own driveway, near Haydon Que And Social Club, or outside St Nicholas Church School. Our engineers ask what got in, roughly how much, and whether it has run, since the answers settle the work and the price. That quote comes on the call, ahead of any van leaving. Emptying that tank comes next, followed by a thorough flush of the system. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own. Filter flushed or, where needed, swapped; clean diesel in; then a test of the vehicle. Your engine is started next and tested to make sure it runs correctly, all before our technicians head off. Using pumps fine on a working forecourt and quiet enough for use outside a house at night, most jobs where your motor hasn't run take roughly half an hour once our technicians arrive. The insurer will ask for the engineer's report and the VAT invoice, and you get both at the end. Payment comes on the day, with no deposit. Plenty of insurance policies include misfuelling cover, so it is worth checking yours while we're on the way. ## About Haydon, for a moment Haydon is a small village in inland Somerset, situated approximately 7.9 miles from the city of Bath. Haydon sits at an elevation of around 113 metres, surrounded by nearby places such as Fox Hills and Waterside. Haydon has a population of around 837 people, predominantly living in semi-detached housing. Haydon is located in the South West region of England, about 101.3 miles from London. ## Haydon and Somerset: AdBlue drains across the area Haydon is a rural village, and our teams that cover it also work the places around it, West Hill Gardens and Waterside among them, across the BA postcode area. A postcode starting BA3 3 gets the van to you fastest. No need to shift the vehicle. The drain takes place right there, be it a driveway, a road near Saint Nicholas, or a lay-by towards Radstock Waterside. Awkward to pin down, like the back of Radstock Youth Hub? Close to a county line? Checking is better than assuming, so ring. ## The short version for Haydon drivers Tip no AdBlue till you've read the cap. If AdBlue has gone in your diesel tank all the same, leave the vehicle off and ring 0333 366 0103. Petrol in Diesel clears it where it waits, anywhere across Somerset.