--- title: Herne: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/herne-kent/ location: Herne county: Kent latitude: 51.350230 longitude: 1.133150 service: AdBlue in a Diesel Tank updated: 2026-10-26 --- # How It Happens and How to Avoid It: AdBlue in a Diesel Tank in Herne AdBlue already in the diesel tank? In that case put this page aside for now, leave your ignition and motor off, then call 0333 366 0103. Around Herne, catching it before the engine runs usually means draining and a thorough flush on the spot. Reading in advance? In that case the rest explains how it happens and what to prevent it happening at all. ## Two fillers, two tanks: AdBlue in a diesel vehicle Many newer diesels on the roads about Herne and Bullockstone carry two liquids, not one. Diesel goes to your motor. Stored in a tank of its own, AdBlue is fed into the exhaust stream and cleans it. There is a filler on every tank. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. Diesel gets filled on each filling station visit, week in, week out. Far less commonly, the AdBlue side gets filled — normally from a bottle, by someone thinking about where it goes. Mistakes happen in that gap between them. ## AdBlue in the diesel tank around Herne: how it happens Carelessness rarely explains it. Instead is three things lining up together. Hurry follows from the warning. The car tells you as AdBlue runs low, and a dry tank puts the vehicle into limp mode — so the top-up gets done in a rush, before work on a drive off School Lane, or heading home in the car park outside The Butcher's Arms. Unfamiliar cars are next, too. Rentals, new vehicles and company motors put their fillers differently, and the hand reaches for the cap it used on the old one. A spout-topped bottle meets no obstacle at a diesel filler no more than at an AdBlue one. So the pour, after begun, keeps on. Whether it happens in Lower Herne or the middle of Herne, it is the same few seconds. ## The AdBlue filler and your diesel filler: telling them apart A few seconds is all the checks take — so run through them before you tip anything, on a drive in Eddington or a forecourt in Herne. - Position can mislead; the cap does not. AdBlue ones tend to be blue or bear the word "AdBlue" — diesel caps normally do not. - Check the size: the smaller neck is, on plenty of vehicles, the AdBlue one. - Look inside your fuel flap: many vehicles carry a label there saying which fuel goes where. - Can't see it beside the diesel filler? Then look beneath the bonnet or in the boot — the owner's manual says where. - The person who drove it last. On a hire or company car picked up from somewhere like the car park at Herne Bay, ask before you leave, not when the light comes on. ## How to top up without AdBlue in the diesel tank A routine for the day the light comes on, wherever around Kent that is. - Switch off after you park — flat ground, engine off, and never in a rush by Ridley Close on the verge. - Locate the AdBlue filler, check the cap, and say the word "AdBlue" out loud as unscrewing it. It seems silly. It does the trick. - The two under a single flap? So confirm the lid on the diesel side is still shut ahead of lifting the bottle. - Tip slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Before you start your car, shut the cap and look again that the diesel cap never opened off. If at stage two or three you find you have already poured into your diesel side, stop there. Don't go on to step five. ## Herne: already put AdBlue in the diesel tank? The short order of things, beginning with no starting your motor. Keep your ignition off as well, since on plenty of diesels switching it on alone runs your fuel pump. Topping up with diesel will not weaken it: instead, AdBlue drops to the bottom of your tank, just where the fuel is taken from. On a forecourt — Sainsbury's, Esso or any other — the staff will usually help push the car clear, when you ask. At home in Herne? So the vehicle remains put. Stop as soon as it is safe and switch off, if your engine has already run. The next junction means the place to come off when you're on the M2, under 10 miles from Herne. About how far did it go? Hopping across Herne is smaller a job than a run of under 10 miles to Canterbury, and so say. ## Herne: what happens when our technicians arrive Wherever the vehicle came to rest, be it outside Herne Church of England Junior School, beside Theatre in the Park or at home, our van comes to it. Those answers determine the work and our price, so our engineers ask what was put in, roughly how much, and if it's run. You hear that price on the phone, before anyone sets off. Then your tank is drained and your system rinsed thoroughly. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it doesn't wash out on its own. The filter cleaned or, where needed, swapped; fresh diesel in; then a test of the vehicle. Before leaving, we fire it up and check that it's running correctly. Most jobs are finished in roughly half an hour once our engineers arrive, as long as the motor hasn't run — and the pumps our technicians use are safe on a busy forecourt and quiet after dark beside a house. Your insurer will ask for an engineer's report and your VAT invoice, and you get both at the end. Payment comes on the day, with no deposit. While we travel, have a look at your insurance documents; plenty carry cover for misfuelling. ## About Herne Herne is a village in Kent, situated near the coast and approximately 5 miles from Canterbury. Herne has a population of around 2054 people and is characterized by semi-detached housing. Herne sits at an elevation of 25 metres, close to nearby places such as Lower Herne and Herne Common. Herne is also within commuting distance to London, being around 55 miles away. ## AdBlue drains around Herne, and Kent beyond Herne Common and Hunters Forstal are among the places around Herne, a coastal village, that the same vans cover, over CT postcodes. Give a postcode that starts CT6 7, and our van gets there quickest. No need to move the car. Wherever it stands — beside Herne Bay Sports Hub, on a lay-by en route to Curtis Wood, on a drive — that is where it is emptied. Ring and ask instead of guessing if you're close to a border, or somewhere hard to explain, like the back of Three Birds Looking. ## For Herne motorists, the short version Before you pour, read the cap. AdBlue in the diesel tank regardless? Keep it off and phone 0333 366 0103; Petrol in Diesel empties it on the spot, across Kent.