--- title: Monkseaton: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/monkseaton-tyne-and-wear/ location: Monkseaton county: Tyne and Wear latitude: 55.041070 longitude: -1.463890 service: AdBlue in a Diesel Tank updated: 2026-10-22 --- # Avoiding AdBlue in a Diesel Tank in Monkseaton: Why It Occurs Keep your engine and ignition off then ring 0333 366 0103 now — reading can wait when AdBlue is already in your diesel tank. A drain and a thorough flush, carried out just where the vehicle stands around Monkseaton, is usually what it takes when caught before the engine runs. If you are reading before it has happened, the remainder of this page is about why it takes place and how to make sure it does not. ## AdBlue in a diesel vehicle: two tanks, two fillers Not one liquid but two: that is what many modern diesels around Monkseaton and Marden run, with diesel for your motor. AdBlue's own tank keeps it, and from there it is sent to your exhaust, and there spraying cleans the fumes. Separate tanks, separate fillers. Some cars keep the AdBlue filler in your boot or under the bonnet; plenty more place both side by side behind one flap. Diesel gets filled on each forecourt call-out, again and again. Far less often, the AdBlue side gets topped up — mostly from a bottle, by a person working out where it goes. That gap is where the error lives. ## How AdBlue in the diesel tank happens in Monkseaton It's seldom carelessness. Three things tend to line up. On a drive off Chapel Lane before work, or in the car park outside The Ship heading home: that is where the hurried top-up takes place. What is the reason for the rush? As AdBlue gets low the vehicle warns you, and if it is gone, limp mode kicks in. New-to-you vehicles come second, too. Hire cars, new cars and company cars put their fillers differently, and habit reaches for the cap it used on the old one. No part stops the pour after it has started, because a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. West Monkseaton or the heart of Monkseaton: it is the same few seconds either way. ## The AdBlue filler and your diesel filler: telling them apart Whether a Monkseaton forecourt or a driveway over in Murton, take a few seconds over these before anything is poured in. - The cap. The AdBlue cap is commonly blue, or marked "AdBlue". Your diesel cap usually is not. Read it instead of going by where it sits. - On many vehicles, the size gives it away: AdBlue has the smaller filler neck. - A label inside the fuel flap often says which fuel goes where, on many cars. Check for it. - In your boot or under the bonnet: that is where your filler sits if it's not by the diesel cap, and the handbook tells you which. - Picking up a hire or company car, perhaps at the car park at Seaton Delaval? Ask the person who drove the car last before you set off, not when the light goes on. ## Keeping AdBlue out of the diesel tank when you top up For the day the light comes on — wherever you are across Tyne and Wear — a simple routine to follow. - Not in a rush on the side of Percy Terrace, not on a slope, not with your engine running: park and switch off first. - Silly as it sounds, speaking "AdBlue" out loud while you unscrew the cap does the trick — once you have located your filler and read the cap. - The diesel cap stays on. Where the two share a flap, make sure it is shut before lifting the bottle. - Finish when your tank is topped up or the bottle is empty; until then, pour gently through the built-in spout. - Only then, start the car: close the cap, check a second time, and make sure your diesel cap was never opened. Stop there if you find, at stage two or three, that you've already poured into the diesel side. Step five is off limits. ## Already put AdBlue in the diesel tank in Monkseaton? Then the order of things is short. Do not start the motor. Leave your ignition off too, since on many diesels switching it on alone starts the fuel pump. Topping up with diesel won't weaken it: rather than mixing, AdBlue drops to the base of that tank, right where fuel is taken from. The staff at Morrisons, Sainsbury's or another forecourt will normally help pushing your car away if asked. Leave it where it is if you are on your own drive around Monkseaton. If your motor has already run, stop as soon as it is safe then switch off. Monkseaton lies under 10 miles from the A194(M); on it, use the first junction. Roughly how far did it go? Crossing Monkseaton is smaller work than a trip of under 10 miles towards Newcastle upon Tyne, so tell us. ## Monkseaton: what happens when we get there Outside Appletree Gardens First School, close to Monkseaton Methodist Church or on your own drive: wherever the vehicle has stopped, our technicians come to it. Our technicians ask what got in, roughly how much, and if it has run, because those replies decide the work and the price. During the call itself, you are told our quote — before dispatch. After that: draining, then a thorough flush of the entire system. More than with petrol, it matters here: the crystals form, some metals corrode, and none of it clears away unaided, however long it is left. The filter flushed or, if it must be, replaced; clean diesel in; and then a check of the vehicle. We don't go until it has been fired up and is running smoothly. Most jobs are done in about half an hour after our engineers get there, as long as the motor hasn't run — and the pumps our engineers use are safe on a live forecourt and quiet at night outside a house. 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's worth checking yours while we are on the way. ## About Monkseaton and where it is Monkseaton is a suburban area in Tyne and Wear, situated on the north-east coast of England, approximately 7 miles from Newcastle upon Tyne. Monkseaton has a mix of housing types, but semi-detached homes are predominant, and the area is relatively low-lying at an elevation of 42 metres. Monkseaton is close to nearby places such as West Monkseaton, Whitley Bay, and Preston Grange, and is about 250 miles north of London. Monkseaton has a population of around 8339 people. ## AdBlue drains across Tyne and Wear, Monkseaton included As a residential suburb, Monkseaton has the same vans as surrounding places — Whitley Bay, Preston Grange — all the way across NE postcodes and the surrounding area around them. A postcode starting NE25 8 gets the van to you fastest. The vehicle does not need to move. Our technicians drain it where it is — a side street close to Friends Meeting House, a lay-by on the way to Souter Park, a drive. Ring and ask rather than assuming if you're close to a boundary, or somewhere hard to explain, like the back of St Peters Church Hall. ## The short version for Monkseaton motorists Before you tip, read the cap. Petrol in Diesel empties it where it stands, anywhere across Tyne and Wear, if AdBlue has gone in the diesel tank regardless — and so leave it off then ring 0333 366 0103.