Don't Start It: AdBlue in a Diesel Tank in Coggeshall
If AdBlue has gone into the diesel tank, keep your engine off and keep your ignition off. AdBlue is urea mixed in water. Unlike fuel, it neither burns nor mixes, and no harm happens until your engine sucks it round. A drain and a thorough flush, done where your car is around Coggeshall, is normally all AdBlue in a diesel tank needs — if it is caught before the engine has run. No step comes before ringing 0333 366 0103.
Your next steps right now, Coggeshall: AdBlue in the diesel tank
Do:
- Keys out — that way nobody can power anything on.
- Hazards on, if moving traffic is anywhere close.
- So you can tell us which fluid it was and about what quantity, keep the till receipt or the empty bottle.
- Give us a postcode starting CO6 1, or whatever street lies nearest, and our van finds you directly — so ring from wherever you are.
Things not to do:
- Not even for a second, and not to roll the car: your motor remains off.
- Turning the key to ignition alone sets your pump going on plenty of diesels. Avoid it.
- No more fuel on top. The AdBlue will not blend, so it is pointless.
- Even a short distance up Market Hill is too far to drive it.
- Emptying the tank on your own by the road is not one to try.
On a forecourt in Coggeshall, whether it is the Esso or another one, ask the staff to help you push your car clear of the petrol pump. If you're on your own drive, leave it precisely where it stands.
What AdBlue does in a diesel tank
Made for the exhaust, AdBlue has no business in the engine. Kept in a separate tank, it is injected into the exhaust to treat the fumes. Nothing in it is meant to pass through a fuel pump, and nothing in a fuel pump is built to handle it.
Fuel mixes; AdBlue, after tipped in, won't. Its behaviour is not at all like fuel's. It drops, since it is denser than diesel, and pools low where the intake draws its fuel from. Simplest of all: one that got AdBlue in Skye Green overnight and hasn't turned since. The AdBlue waits at the base of your tank, undrawn — but it would be first through once the engine starts, before any diesel at all.
It causes two kinds of damage from there. Crystals and corrosion. As the water evaporates, it strands urea that hardens in filter elements and narrow channels; meanwhile, since it attacks certain metals, each part it touches suffers for as long as it remains inside. If the AdBlue has reached the pipework, leaving it overnight around Coggeshall leaves things worse. Inside that tank alone, time costs nothing. Diesel lubricates the injection pump and every injector as it flows; water gives no lubrication, and that is a second form of harm.
AdBlue in a diesel: why it is regularly worse than petrol
Petrol pumped into a diesel on BP's forecourt leaves your fuel thin — that's the main fault. No harm is done as long as it stays unused, blended into your diesel — only once the motor works on it.
AdBlue in a diesel is a fault of the wrong substance altogether. It does not burn, and so it cannot just be run through. Nor can it be watered down, since it separates back out — and the following tankful won't rinse away deposits or corrosion. So the flush matters for more with AdBlue, and trying the engine "to see", in the heart of Coggeshall or out in Stockstreet, costs more than nearly any other slip.
As with petrol, there's good news. Anywhere around Essex the car has stopped, an unstarted motor means the AdBlue still in the reservoir: the simplest part of any fuel system to empty.
How does AdBlue end up in a diesel tank in Coggeshall?
It's not deliberate. Plenty of vehicles keep the AdBlue inlet beside the diesel inlet, now and then behind one flap, and mixing them up is easy in poor light. Mostly it takes place with a bottle bought on the way home and poured in on the driveway, not at the forecourt.
It tends to take place in a few familiar ways. Rushing, outside St Peter's Church of England Voluntary Controlled Primary School, Coggeshall, after a warning lamp came on during the school run, a parent refills the vehicle. A bottle is poured in at the end of the day on a drive just off Church Street. Another pattern: darkness, a pub car park by The Chapel Inn, and a driver using that flap for the first time.
It crops up the most in a rental, a new motor, a fleet car, or the spare motor of a home with both fuel types — the cars drivers use the least. Wherever you're in Coggeshall or the rest of Essex, it's the same error and the same first answer: leave the vehicle off.
Coggeshall: started your engine with AdBlue in the diesel tank?
Then your tank is no longer where the AdBlue is. It's been sucked through the fuel filter and the fuel lines, and if your engine ran for any time, it has got to the high-pressure pump and the injectors.
Expect lumpy running, smoke, lost power, lights on your dash, or a stall — returning from South's Spinney, say, or midway across Coggeshall. Stop when safe. Switch off. Keep the vehicle off instead of restarting it to check. Each start pulls more of that through.
Coggeshall sits under 25 miles from the M11; if you were on it, exit by the next junction and stop somewhere safe rather than driving on.
How far it went counts. A couple of hundred yards across Coggeshall to the car park by Constantines is a very different job from a run towards Colchester, under 10 miles away, with the AdBlue reaching further into the system with every mile. Tell us roughly how far it had come.
There is more to flush once your engine has been run, and we do all of it where your car has stopped. If it is spotted quickly, long-term damage is very unusual.
What draining AdBlue from a diesel involves around Coggeshall
We come to the car, wherever it has stopped in Coggeshall: a side street near Coggeshall Market, a drive, a lay-by or a forecourt. Before anything else we ask what got in, roughly how much, and whether the engine has been run, because those replies settle this work.
Right there, your tank is then emptied, and all of the contaminated diesel and the urea leave at once. The fuel system is purged thoroughly, which matters more with AdBlue than with petrol, because what it leaves behind doesn't rinse out on its own. Fresh diesel goes in after your filter is flushed — or replaced, if it needs to be — and after that the car is tested. About half an hour on site is usual for most jobs when your motor hasn't run. Our equipment is explosion-proof, and so a busy forecourt is no problem, and it's quiet enough for a residential street after dark.
The last step is to bleed the system on fresh diesel. You set off as soon as we have started it, and it makes no difference whether your car is on a driveway in Coggeshall or in a bay outside Kelvedon. The test before our technicians head off is that it runs smoothly on clean diesel. Since the job is done in full where your car is, a garage never comes into it. Insurers want a VAT invoice and an engineer report, and both come at the end.
About Coggeshall itself
Coggeshall is a town situated on the River Blackwater in Essex, with a population of around 4662 people. Coggeshall sits at an elevation of 34 metres, approximately 43 miles from London and 9 miles from Colchester. Coggeshall has a mix of housing types, but semi-detached homes are predominant. Coggeshall is close to nearby places such as Tilkey, Coggeshall Hamlet, and Surrex.
Coggeshall and Essex: AdBlue drains across the area
Over the CO postcode area, the vans answering AdBlue jobs around Coggeshall reach most of Essex as well, Tilkey, Coggeshall Hamlet and Surrex included. If you're close to a border, or somewhere hard to explain, ring and ask rather than guessing.
No towing is needed. In Coggeshall, a riverside town, a mobile service fits: your vehicle is drained where it stands, whether on a drive, a residential street, a parking area or a forecourt.
Coggeshall: what AdBlue in a diesel tank costs to fix
Every job is different, and so no fixed price is honest. Whether the engine has run, and for how long, comes first in what moves the price. How much AdBlue was put in comes next, and then the location of the car, since an open drive is easier for our van to get to safely than a tight space behind Coggeshall Parish Hall.
Ahead of any quote, never afterwards, each call from Coggeshall opens with three checks: the liquid, the amount, plus if the engine ran. With those replies, a range narrows to a single firm figure.
Before anyone sets off, you hear our price on the phone. Then you pay on the day, card or over the phone, with nothing upfront. Misfuelling cover is part of plenty of insurance policies, so it pays to look at yours before the van gets there.
Still next to the car around Coggeshall?
Leaving the vehicle alone is, then, the best move you can do. Ignition off, engine off, keys out. Phone 0333 366 0103: AdBlue, the amount, plus whether it ran is everything we need. Petrol in Diesel handles the rest across Essex, Coggeshall included.