Hadley: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It?
Leave the engine and ignition off and ring 0333 366 0103 first — reading can wait if AdBlue is already in your diesel tank. Usually, if your motor hasn't run, it's emptied and fully flushed where your car sits around Hadley. Here in advance? In that case what follows covers how it happens and how to stop it ever happening.
Why does AdBlue in a diesel car need its own filler?
Diesel goes to your motor — yet plenty of modern diesels driven about Hadley and Kitts End carry another fluid too. Its own tank keeps it, and from there it goes to the exhaust, and there spraying treats the gas.
There is a filler for every tank. Other cars put the AdBlue filler in your boot or under the bonnet; a lot more have both together under one flap. Diesel goes in on each forecourt call-out, again and again. A driver who has to stop and work out where it goes usually fills the AdBlue side, from a bottle, and much less often. It is in that gap that the error lives.
How AdBlue in the diesel tank occurs in Hadley
It is hardly ever carelessness. Three things tend to line up.
Hurry comes from the warning. Your car tells you as AdBlue runs low, and an empty tank sends it into limp mode — so the top-up happens in a rush, before work on a driveway off Hadley Green Road, or heading home in the car park at Ye Olde Monken Holt.
Then, the hand reaches for the cap it would have used on the old vehicle — since a rental car, a new car or a company car places the fillers where your last one did not.
Lastly, the bottle goes in: a diesel filler or AdBlue one, it slides in as easily, and after the pour starts, no part halts it. Monken Hadley or the middle of Hadley: it takes the same few seconds in both.
Which filler is for AdBlue, and which for diesel?
Check these first, at a forecourt in Hadley or a driveway over in New Barnet. Seconds, no more.
- Read the cap rather than going by where it sits: AdBlue caps are regularly blue or marked "AdBlue", and diesel ones usually are not.
- Check the size: the smaller filler neck is, on many cars, the AdBlue one.
- Look inside the fuel flap: many vehicles have a label there saying which fuel goes where.
- The handbook shows which it is when your filler isn't next to your diesel cap: your boot, or under the bonnet.
- The person who drove the vehicle last. On a hire or company car collected from somewhere like the car park at Hadley Wood, 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 across Greater London that is.
- Not in a rush on the side of Hadley Green, not on a slope, not with the engine running: park and switch off properly.
- Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds daft and it does the trick.
- Leave your diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle.
- Stop when your tank fills or the bottle is empty; until then, pour gently through its built-in spout.
- Close the cap and check once more. Make sure your diesel cap was never opened. Only then start the car.
Discover at the second or third stage that AdBlue went in the diesel filler? That's where you stop. Don't carry on to step five.
Already put AdBlue in the diesel tank in Hadley?
Then the order of things is short. Don't start the motor. Don't switch your ignition on; on many diesels that alone runs the fuel pump. Diluting it with extra diesel fails, because AdBlue sinks to the base rather than blending — and that's where your fuel is pulled from.
If you're on a forecourt, whether it's the Esso or the BP, ask the attendants to help push the vehicle away from the pump. At home around Hadley? So the vehicle remains where it is.
Where the motor has run by now, stop safely and turn the car off. On the M25, under 3 miles from Hadley, that means the next exit. Tell us roughly how far it went: a run towards St Albans, under 10 miles away, is a bigger job than a short hop across Hadley.
Hadley: what happens when we arrive
Outside Foulds School, near High Barnet Baptist Church or on your own drive: wherever your car has stopped, we come to it. Both the work and the quote rest on three replies — what fluid, which quantity, and whether it's run — so our technicians ask. The price comes on the call, ahead of any van leaving.
Your system is then purged thoroughly, after that tank is emptied. Not like petrol, AdBlue leaves crystals and attacks some fuel-system metals, and none of that washes out by itself. Hence it counts more. After your filter is flushed — or renewed, if required — fresh diesel goes in, and finally your vehicle is tested. The engine is fired up next and checked to make sure it runs correctly, all before our technicians head off.
Most jobs are finished in roughly half an hour after our engineers get there, provided your motor hasn't run — and the pumps our technicians use are fine on a busy forecourt yet quiet after dark beside a house. Paying happens on the day, not upfront, and you are given the paperwork your insurer wants: an engineer report and a VAT invoice. It is worth looking at your insurance as the van travels to you: misfuelling cover comes with many policies.
About Hadley itself
Hadley is a suburban area in Greater London, situated near the River Lea and characterised by flat dwellings. Hadley sits at an elevation of 133 metres, with nearby places including Monken Hadley, Chipping Barnet, and Underhill. Hadley is located approximately 10.9 miles from central London and 8.8 miles from St Albans, with a population of around 5294 residents. Hadley forms part of the wider north London urban landscape, with the riverside setting influencing its development.
AdBlue drains round Hadley, and Greater London beyond
Over EN postcodes, the teams that cover Hadley — a residential suburb — work the nearby locations too, Underhill and Chipping Barnet among them. A postcode starting EN5 5 gets the van to you fastest.
There's no need to move the vehicle. Anywhere it sits — beside Christ Church, Barnet, on a lay-by heading to Hadley Green, on a drive — that is where it is drained. Ring and ask rather than guessing if you are near a border, or somewhere hard to describe, like the back of The Spires Shopping Centre.
In short, for Hadley drivers
Read the cap before you pour. If AdBlue has gone in your diesel tank regardless, leave it off then call 0333 366 0103. Petrol in Diesel drains it where it stands, anywhere in Greater London.