AdBlue in a Diesel Tank in The Marsh? Don't Start It
AdBlue in the diesel tank? Then leave the motor off — and the ignition too. Chemically, AdBlue is simply urea in water. As it is water-based, it will not ignite and won't blend with diesel; damage just starts once the pump starts drawing it. A drain and a thorough flush, done where your car is in The Marsh, is normally all AdBlue in a diesel tank needs — if it's caught before your engine has been run. No step comes before ringing 0333 366 0103.
Those opening minutes: AdBlue in your diesel tank around The Marsh
Things to do:
- Pull the keys out, and so no one switches the ignition on.
- Put the hazards on if you're anywhere close to moving traffic.
- Which product, and roughly what volume? Hang on to the bottle or the receipt, and we can know.
- Give us a postcode starting HR6 8, or whichever street lies nearest, and our van reaches you straight — so call from wherever you stand.
Don't do these:
- Moving the car just a few yards is no reason to start the motor.
- Switching the key to ignition alone sets the pump running on plenty of diesels. Skip it.
- Adding more diesel does not work: AdBlue separates out rather than thinning.
- Even a short stretch down Ridgemoor Road is too far to drive the vehicle.
- By the road, do not attempt draining it yourself.
Get the attendants to help you move your vehicle off the island if you're at a forecourt in The Marsh, whether it is the Leominster Service Station or elsewhere. On your own driveway, don't move it at all.
AdBlue in a diesel tank, and what it does there
Not the engine but the exhaust is where AdBlue is meant to go. Its own reservoir holds it, and from there it's fed into your exhaust, and there it cleans the gas. A fuel pump isn't made to cope with it, and AdBlue was never intended to travel through one.
It does not blend. After it's tipped into the tank, AdBlue behaves not at all like fuel. The pickup sucks fuel from the lowest part of the tank, and that is precisely where AdBlue settles: as it is denser than diesel, it sinks. A car filled on a drive in Ryelands yesterday evening and not started since counts as the straightforward case. No pump has pulled the AdBlue up so far — though when the motor turns, that's what goes first, straight from the bottom of your tank.
From there it does two kinds of damage. As its water goes, the urea left behind crystallises, and the crystals block filters and settle in fine passages. And it is corrosive to some of the metals a fuel system is made from, so it keeps running on the parts it gets to for as long as it remains there. Lines carrying AdBlue spell damage by morning for a vehicle sitting around The Marsh. Only inside your tank, it stays stable. And there's the water: it offers no lubrication to the parts that need it the most — the injection pump and every injector.
Why AdBlue in a diesel is frequently more major than petrol
Fill a diesel with petrol in error at the Shell, and this issue is thinned fuel. Damage just comes from driving on it. Mixed into the diesel and sitting in your tank, it does nothing.
The issue with AdBlue in a diesel is a totally wrong substance. It cannot simply be run through, since it does not burn. Nor can it be thinned, because it splits again — and the next fill won't clear away crystals or corrosion. So the flush counts for more here, and trying the engine "to see", in the heart of The Marsh or out in Barons Cross, does more harm than nearly any other mistake.
The same good news applies as with petrol. Emptying a tank is the simplest part on a fuel system, and with no running, the AdBlue remains in there — anywhere around Herefordshire your vehicle has stopped.
The Marsh: how AdBlue ends up in a diesel tank
Many vehicles put the AdBlue filler beside the diesel one, occasionally behind one flap, and after dark the two may look the same. No one means it. Most of the time it occurs with a bottle bought on the way home and poured in on the drive, not at the forecourt.
The ways it takes place are few and familiar. Midway through the drop-off, the dashboard warns, and outside Leominster Primary School the refill is hurried. A bottle is poured in at the end of the day on a drive just off Cheaton Close. Or a driver new to that flap refills the vehicle in dim light, parked in the car park outside The Hop Pole.
The least known cars see it most — hire cars, brand-new cars, fleet ones, and the other motor in a home with one of each fuel types. An identical mistake, same first response — leave it off — wherever you are around The Marsh or the remainder of Herefordshire.
AdBlue in the diesel tank in The Marsh, and the engine started?
The AdBlue has left the tank, then. Through the fuel filter, along the pipework, and — given any running — into the high-pressure pump and every injector: that is how far it travels.
Watch for rough running, exhaust smoke, falling power, warnings on the dash, or a cut-out — coming back from Dales Cricket Club, say, or part way across The Marsh. No starting it again to check: pull over when it is safe, then switch it off. Each start pulls more of it through.
Exit the M50, under 25 miles from The Marsh, at the next junction and stop safely, rather than driving on.
Mileage matters: each mile carries the AdBlue further into your system, and so heading for Hereford, under 15 miles away, makes a much larger job than crossing The Marsh to the car park by Leominster Community Centre. Roughly how far it had come is worth telling us.
There is more to clean out once the motor has been started, and our technicians do all of it where the vehicle has ended up. When it is noticed early, permanent damage is very uncommon.
What draining AdBlue from a diesel involves in The Marsh
A road beside The Forbury Chapel, a drive, a layby or a forecourt: anywhere the car has come to rest in The Marsh, we come to it. What was put in, about the quantity, plus if the motor has been run: our engineers check first, because those shape the work.
Then that tank is emptied where your car stands, so the contaminated fuel and the AdBlue come out together. A careful flush matters far more with AdBlue than with petrol, since residue won't wash away on its own. Fresh diesel goes in after the filter is flushed — or replaced, when it needs to be — and after that your vehicle is tested. Most of these jobs are a half-hour job once our technicians get there, if the motor hasn't run. Quiet enough to use outside a house at night, and fine on a busy forecourt, our pumps are explosion-proof.
Priming the fuel system with fresh diesel comes at the end. You head off as soon as we have started the engine, and it makes no difference whether the vehicle is on a drive around The Marsh or in a bay by Leominster. Our engineers make sure it runs correctly on new diesel before we go. Our technicians do it all wherever the vehicle has ended up, and it never needs to be taken to a workshop. You get a VAT invoice and an engineer report later, which is what insurers ask for.
About The Marsh itself
The Marsh is a suburban area situated on the riverside in Herefordshire, with an elevation of 72 metres. The Marsh lies approximately 12 miles from Hereford and 122 miles from London, making it a relatively accessible location. The Marsh is characterised by its semi-detached housing and is near to other places such as Leominster and The Broad. The Marsh has a population of around 3807 people.
AdBlue drains across The Marsh and Herefordshire
Throughout the HR postcode area, the teams answering AdBlue jobs in The Marsh reach much of Herefordshire as well, Leominster, The Broad and Newlands included. Assuming won't help by a county line or anywhere tricky to describe; phone and ask.
No moving is needed. In The Marsh, a residential suburb, a mobile service fits: your car is emptied where it stands, whether in a driveway, a side street, a car park or a forecourt.
The Marsh: what AdBlue in a diesel tank costs to fix
No flat price could be fair, since each job differs. The price moves first with how long, if at all, the motor has been running, and next with the amount of AdBlue that got in. After that it depends on where the vehicle is and whether a van can reach it safely, which is easier on an open drive than in a tight gap behind Leominster Priory - Scheduled Monument.
That's why each call from The Marsh starts with the same three queries, asked before giving a figure, not after: what went in, how much, and if it's run. Once they are known, a range turns into one fixed figure.
Priced on the call before the engineer heads out, the job is settled on the day — card or phone, nothing in advance. Misfuelling cover is part of many insurance policies, so it pays to look at yours before the van arrives.
In The Marsh and still alongside your car?
Then the most helpful thing you can do is nothing to the vehicle. Ignition off, engine off, keys out. Tell us it's AdBlue, roughly what quantity, and whether it ran, on 0333 366 0103. After that Petrol in Diesel handles it, across The Marsh or anywhere in Herefordshire.