--- title: AdBlue in a Diesel Tank Marham: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/marham-norfolk/ location: Marham county: Norfolk latitude: 52.660220 longitude: 0.524960 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # AdBlue in a Diesel Tank in Marham: Why It Occurs and How to Avoid It Leave your motor and ignition off then ring 0333 366 0103 first — the rest can wait if AdBlue is already in the diesel tank. In Marham, finding it before the engine turns usually means a drain and a thorough flush where it stands. The remainder of this page explains why it occurs and how to ensure it doesn't — handy if you are reading ahead of time. ## AdBlue in a diesel motor, and its separate tank Plenty of modern diesels in Barton Bendish, as well as Marham, carry on two liquids; your engine gets only the diesel. AdBlue's own tank holds it, and from there it goes to the exhaust, and there spraying treats the fumes. Each tank comes with a filler of its own. Other vehicles put the AdBlue filler in the boot or under the bonnet; a lot more place both side by side behind one flap. The diesel side is filled at the petrol pump all the time. Far less frequently, the AdBlue side is topped up — mostly from a bottle, by a person working out where it goes. That gap is where the mistake lives. ## Marham: how AdBlue in your diesel tank takes place Seldom is it carelessness: normally three things coincide. 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 happens in a rush, before work on a driveway off Mill Lane, or heading home in the car park outside the pub in the village. Then the vehicle is new. A hire car, a new car or a company car puts the fillers where your last one did not, and the hand hits for the cap it would have used on the old one. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the pour after it has started. Shouldham or the middle of Marham: it takes the same few seconds either way. ## The AdBlue filler and the diesel filler: telling them apart A couple of seconds is all these take — so run through them before you tip anything, on a driveway in Narborough or a forecourt in Marham. - Colour and lettering: an AdBlue cap is often blue, or says "AdBlue", where a diesel cap usually does not. Go by the cap, not its position. - The size. On plenty of cars the AdBlue filler neck is the smaller of the two. - Look inside the fuel flap: many vehicles carry a label there saying which fuel goes where. - In your boot or under the bonnet: that's where your filler is if it's not by your diesel cap, and the handbook tells you which. - The previous driver knows. Check when you collect a rental or company car — at Watlington's car park, perhaps — rather than once the warning comes on. ## Keeping AdBlue out of the diesel tank when you top up On the day the light appears — wherever you are in Norfolk — a routine to use. - Stop somewhere level, engine off, with time in hand — never hurried on the side of Villebois Road. - Find the AdBlue filler, read the cap, and speak the name "AdBlue" aloud while unscrewing it. It seems silly. It works. - The diesel cap remains on. Where the two share a flap, make sure it is closed before lifting the bottle. - Slowly does it, through the bottle's own spout, until it's full or the bottle is empty. - Close the cap, and look again — making sure the diesel cap remained closed the whole time. Only then, start your car. Find during the second or third step that the bottle went into the wrong filler? That's where you stop. Leave out step five altogether. ## Already put AdBlue in your diesel tank in Marham? The short order of things, beginning with no starting the engine. Don't switch the ignition on; on plenty of diesels that alone runs the fuel pump. Topping up with diesel won't thin it: rather than mixing, AdBlue sinks to the bottom of the tank, right where the fuel is taken from. At a forecourt — Fincham Filling Station, another forecourt nearby or any other — the attendants will normally help roll your car clear, when you ask. If you're on your own drive around Marham, leave the car where it sits. When the engine has run already, pull over safely and switch the car off. Come off the M11 — under 50 miles out of Marham — at the next junction. A short hop across Marham is a smaller job than a run towards Ely, under 25 miles away, so tell us about how far it went. ## Our arrival in Marham, and what occurs next Our van comes to the car anywhere it has come to rest — your own drive, beside Marham Village Hall, or by Cherry Tree Academy Trust Marham Junior. Those replies settle the work and the price, and so our technicians ask what went in, roughly how much, and whether it's run. You hear that price on the phone, before anybody heads out. After that: a drain, then a thorough flush of the entire system. Not like petrol, AdBlue leaves crystals and eats at certain fuel-system metals, and none of that clears away unaided. Hence it counts more. Testing comes last: before that, fresh diesel goes in, and the fuel filter is flushed or replaced as needed. We don't go until it has been fired up and is running smoothly. Unrun vehicles mostly mean a half-hour job from arrival. The kit is fine on a busy filling station, and hushed enough for a residential street late at night. Nothing upfront; you settle up that day. Afterwards, the VAT invoice and a report from the engineer are handed to you for your insurer. It is worth looking at your insurance as the van travels to you: misfuelling cover comes with plenty of policies. ## About Marham itself Marham is a small village in Norfolk, situated in the eastern part of the county, with a low elevation of around 10 metres. Marham lies near the villages of Shouldham, Fincham, and Pentney, and is approximately 21 miles from the city of Ely. Marham has a population of around 770 people, predominantly living in detached houses. Marham is located about 84 miles from London, making it a rural community with some distance from the capital city. ## Marham and Norfolk: AdBlue drains across the area Fincham and Pentney are among the towns near Marham, a rural village, that the same vans cover, throughout PE postcodes. Fastest of all: give a PE33 9 postcode for the van. No need to move the car. The drain happens right there, whether a driveway, a road near Holy Trinity, or a layby towards Marham Fen. Guessing doesn't help behind Marham Village Sign, close to a boundary, or somewhere awkward to describe; ring and ask. ## In short, for Marham people Before you pour, read the cap. If AdBlue has gone in the diesel tank regardless, leave it off and phone 0333 366 0103. Petrol in Diesel empties it where it stands, anywhere in Norfolk.