Grendon Underwood: AdBlue in the Diesel Tank? Leave It Off
If AdBlue has gone into the diesel tank, leave your motor off then leave the ignition off. Urea mixed in water is what AdBlue is. As it is water-based, it won't burn and never combines with diesel; trouble only starts when your pump starts pulling it. In Grendon Underwood, AdBlue in a diesel tank found before your engine runs usually means a drain and a thorough flush, just where your car is. Nothing comes before calling 0333 366 0103.
What to do right now, Grendon Underwood: AdBlue in the diesel tank
Do these:
- So no one can turn the ignition on, take the keys away.
- Close to moving traffic? So put the hazards on.
- Keep the till receipt or the empty bottle, and so you can tell us what was put in and roughly how much.
- Call right where you are. Quote a HP18 0 postcode or the closest street name, and no one has to search for you.
Not to do:
- No starting your engine — not briefly, not to shift your car.
- Your ignition remains off: on many diesels, switching it on is enough to run the fuel pump.
- Adding extra diesel does not work: AdBlue settles out instead of blending.
- Never drive the vehicle anywhere, not even a short stretch down Bakery Close.
- Do not try to drain the vehicle yourself at the roadside.
Ask the people behind the counter to help you roll the car away from the pumps if you are on a forecourt around Grendon Underwood, whether it's the the nearest petrol station or somewhere else. If you're on your own drive, leave the vehicle exactly where it is.
AdBlue in a diesel tank, and what it does there
AdBlue is made for the exhaust, not the motor. Stored in a dedicated tank, it is injected into the exhaust to clean the fumes. Nothing in it is meant to pass through a fuel pump, and nothing in a fuel pump is built to handle it.
It does not blend. Once it is poured into the tank, AdBlue acts nothing like diesel. Denser than diesel, it drops and collects below it — the same spot the pickup sucks from. Easiest of all: one that had AdBlue in Tetchwick last night and hasn't turned since. The AdBlue waits at the base of that tank, undrawn — though it will be the first thing through if your engine runs, before any diesel at all.
It causes two kinds of damage from there. Crystals and corrosion. As the water dries, it leaves urea that hardens in filters and narrow passages; meanwhile, since it eats at some metals, each part it reaches suffers for as long as it stays in there. Overnight, a car sitting around Grendon Underwood with AdBlue in its lines gets worse; if it is only in the tank, nothing changes. Water protects nothing. The injection pump and each injector need diesel running past them, so the water content damages them by itself.
AdBlue in a diesel: why it's regularly worse than petrol
Fill a diesel with petrol by mistake over at the another forecourt nearby, and the problem is diluted fuel. It mixes with your diesel, and whilst it is in that tank it causes no damage; the harm comes from running your engine on it.
AdBlue in a diesel is another problem: not thin fuel, yet no fuel at all. It doesn't burn, so it cannot just be run through. Nor can it be watered down, because it separates back out — and the following fill won't clear away crystals or corrosion. So the flush matters more with AdBlue, and trying your engine "to see", in the heart of Grendon Underwood or out in Greatmoor, does more harm than nearly any other error.
As with petrol, there's good news. Wherever around Buckinghamshire your vehicle has come to rest, an unrun engine leaves the AdBlue still in the reservoir: the simplest part of any fuel system to empty.
How AdBlue ends up in a diesel tank around Grendon Underwood
In dim light, two caps side by side — the AdBlue cap and the diesel one, now and then behind a single flap — can appear the same. Nobody means it; plenty of designs invite it. Mostly it happens with a bottle bought on the way home and poured in on the driveway, not at the forecourt.
Usually, it takes place in one of a few familiar ways. A warning light comes on during the school run, and the top-up takes place in a hurry outside Grendon Underwood School. A bottle is poured in at the end of the day on a drive just off Darley's Close. Otherwise, after dark outside the pub in the village, your car gets refilled by someone opening that flap the first time.
Hired motors, brand-new vehicles, fleet motors, or the spare vehicle in a family with one of each: the least familiar cars get it the most. Keep it switched off: that's the first step to an identical slip, anywhere around Grendon Underwood or the remainder of Buckinghamshire you happen to be.
Started your engine with AdBlue in the diesel tank in Grendon Underwood?
In that case, the AdBlue is no longer in the tank. It has been sucked through the filter and the fuel lines, and if the engine ran for any time, it has reached the high-pressure fuel pump and the fuel injectors.
Lumpy running, smoke, lost power, dashboard lights or cutting out: each may appear, perhaps part way across Grendon Underwood or coming back from Doddershall Wood. Pull over when safe. Switch off. Keep the car off rather than restarting it to check. Every start pulls more of that through.
On the M40, under 10 miles from Grendon Underwood, the first junction is where to exit, and somewhere safe is where to park — not carrying on.
How far it went counts. A few hundred yards across Grendon Underwood to the car park by St Leonard is a very different job from a run towards Oxford, under 15 miles away, with the AdBlue reaching further into the fuel system with every mile. Roughly how far had it come? Tell us.
We do all of the rinsing where the car has stopped, and once the engine has been started there is more of it. Noticed early, it very seldom leaves permanent damage.
Grendon Underwood: how AdBlue is cleared from a diesel
We come to your car, wherever it has stopped around Grendon Underwood: a side street close to St Michael and All Angels, a drive, a lay-by or a forecourt. Three replies shape the work, so before anything else we ask which fluid got in, about what quantity, and whether the engine has turned over.
The polluted diesel and the urea come out as one when your tank is emptied, right there. Your system is cleaned thoroughly, which counts more with AdBlue than with petrol, since what it leaves behind does not rinse out on its own. Clean diesel goes in after the filter is flushed — or replaced, if it needs to be — and after that the vehicle is tested. Not run? Then count on about half an hour on site for most jobs. Explosion-proof pumps make a busy forecourt safe to work on, and they run quiet enough to spare the neighbours at night.
Last, your system is bled with fresh diesel. Whether it is a parking bay by Bicester Village or a driveway around Grendon Underwood, that is where we fire it up and you drive off. It is tested on fresh diesel to make sure it runs correctly before our engineers leave. Our engineers do it all wherever your car has stopped, and it never has to go to a workshop. Insurers ask for a VAT invoice and an engineer report, and you get both at the end.
About Grendon Underwood and where it is
Grendon Underwood is a village in Buckinghamshire, situated near the River Great Ouse at an elevation of around 75 metres. Grendon Underwood lies within the South East region, approximately 45.7 miles from London and 13.8 miles from Oxford. Grendon Underwood has a population of around 727 people, predominantly living in detached houses, and is close to nearby places such as Edgcott and Kingswood.
AdBlue drains across Buckinghamshire, Grendon Underwood included
Edgcott, Kingswood and Ham Green are among the places around Grendon Underwood that the same teams reach, along with most of Buckinghamshire beyond, over the HP postcode area. Ring and ask rather than guess if you're close to a border, or anywhere awkward to pin down.
A van that comes to you fits Grendon Underwood, a village: you have no need to bring your car to us, because our engineers drain it on the spot, on a driveway, a side street, a car park or a forecourt.
AdBlue in a diesel tank around Grendon Underwood: the cost of fixing it
Each job is different, and so not one single quote is fair. Three things shift the cost: whether the motor has run and for how long, how much AdBlue went in, and where the car is. That last one rests on whether our van can reach it safely, and an open driveway is simpler than a tight space behind Calvert Green Village Hall.
Which fluid got in, how much, and whether the engine ran: every Grendon Underwood call begins by asking exactly those, ahead of any quote, never afterwards. With those replies, a range narrows to a single firm figure.
Before anyone heads out, you hear the quote on the phone. And payment is on the day, card or over the phone, with nothing upfront. While our engineer is travelling, check your insurance: plenty cover misfuelling.
Next to the vehicle in Grendon Underwood, right now?
Then, touch nothing — that is the best move available. Keys out, engine off, ignition off. Petrol in Diesel takes over the remainder, across Grendon Underwood or wherever in Buckinghamshire, after you ring 0333 366 0103 saying it's AdBlue, about how big an amount, and if the engine ran.