AdBlue in the Diesel Tank in Trethosa? Keep It Switched Off
AdBlue in the diesel tank? Then keep your engine off — and the ignition as well. In plain terms, AdBlue is just urea in water. It does not burn, it doesn't mix with diesel, and the damage it does begins when your fuel system draws it in. If the motor hasn't run yet, AdBlue in a diesel tank is usually drained and thoroughly flushed where your car sits in Trethosa. No step comes before ringing 0333 366 0103.
What to do right now, Trethosa: AdBlue in the diesel tank
Do:
- Take your keys out, and so no one switches your ignition on.
- Close to moving traffic? So put your hazards on.
- Keep the till receipt or the empty bottle, so you can tell us what went in and about how much.
- Call us from where you are. A postcode starting PL26 7, or the name of the nearest street, brings our van to you without a search.
Never do these:
- Don't start your engine, even for a moment to move the vehicle.
- Don't switch the ignition on. On plenty of diesels that alone runs the fuel pump.
- Adding extra diesel does not work: AdBlue settles out rather than blending.
- Any driving at all is best avoided, including a short way along Lower Meadows.
- Draining that tank on your own by the road is not one to try.
On a forecourt around Trethosa, whether it is the the nearest petrol station or another one, ask the attendants to help you roll the vehicle clear of the petrol pump. At your own drive, do not touch it at all.
AdBlue in a diesel tank, and what it does there
Meant for your exhaust, AdBlue has no place in your engine. Its own reservoir keeps it, and from there it is sprayed into your exhaust, and there it cleans the gas. Neither side fits the other: urea doesn't belong in a pump, and a pump cannot take urea.
Poured in with the diesel, it stays separate rather than mixing — entirely different from fuel. Heavier than diesel, it drops and collects below it — the very place the pickup sucks from. When the system runs, the AdBlue is first to be pulled through. Until then it waits beneath the diesel, and that is how a vehicle filled in St Stephen yesterday and never started stays the simple case, provided no one touches the key.
Two kinds of harm come from there. What remains once the water evaporates is urea, which turns into crystals: they lodge in tiny channels and block filters. On top of that, it eats at certain metals in the fuel system, and carries on until it's cleared out. If the AdBlue is in the pipework, leaving it overnight in Trethosa makes it worse. Inside the tank alone, waiting costs nothing. The water in it does harm of its own: the high-pressure fuel pump and your injectors depend on diesel to lubricate them, and water gives them nothing.
Why AdBlue in a diesel is frequently more serious than petrol
Top up a diesel with petrol in error at the Shell, and the issue is thinned fuel. Mixed through the diesel and left still, it's harmless for now; running the motor does the harm.
AdBlue in a diesel is a different problem: not thin fuel, but no fuel at all. It doesn't burn, so it can't simply be run through. Crystals and corrosion remain through the next tankful, and AdBlue separates back from the diesel, so thinning it can't work. Hence the flush matters so much, and turning your key "to see" costs more with AdBlue than almost any other slip — in Goonamarris or the centre of Trethosa alike.
The good news is the same as with petrol. Clearing a tank is the simplest part on a fuel system, and with no start-up, the AdBlue stays in it — wherever around Cornwall your car sits.
Trethosa: how AdBlue ends up in a diesel tank
Nobody means to do it. The AdBlue filler on many cars rests right next to the diesel filler, at times under the same flap, and the two caps can look alike in poor light. Most of the time it happens with a bottle bought on the way home and poured in on the drive, not at the pump.
It tends to take place in a couple of familiar ways. Midway through the drop-off, the dashboard warns, and outside St Stephen Churchtown Academy the refill is rushed. Close to Kernick Close, someone tips a container in at home in the evening. Or someone new to that flap refills the vehicle after dark, parked in the car park by Queens Head.
It happens most in the vehicles drivers know least: a hire car, a new car, a company car, or the second motor of a household with one diesel and one petrol. Leave it off: that's the first response to the same slip, wherever in Trethosa or the rest of Cornwall you are.
AdBlue in your diesel tank in Trethosa, and your engine started?
Then your tank is no longer where the AdBlue is. With any running time, it goes on to the high-pressure pump and every injector, having passed through the filter and pipework.
You may notice the engine running unevenly, smoking, losing power, showing warning lights or cutting out, maybe on the way back from Tregargus Valley or halfway across Trethosa. Stop when safe. Switch off. Keep the car off instead of testing it again. Every start pulls more of it through.
If you were on the M5, over 50 miles from Trethosa, come off at the next junction and stop somewhere safe rather than pressing on.
Distance counts: each mile pushes the AdBlue further in, and so driving for Truro, under 10 miles away, makes a far bigger job than hopping across Trethosa to the car park by St Stephen Community Centre & Social Club. Tell us about how far it had come.
We do all of the flushing where the vehicle has stopped, and once the engine has been started there is more of it. Spotted early, it very rarely leaves permanent damage.
What emptying AdBlue from a diesel involves around Trethosa
We come to the car, wherever it has stopped around Trethosa: a side street close to St Stephen in Brannel Church, a drive, a lay-by or a forecourt. Before anything else our technicians ask what got in, roughly how much, and whether the engine has run, since those answers settle this work.
The polluted diesel and the urea leave as one after your tank is emptied, right there. The system is flushed thoroughly, which matters more with AdBlue than with petrol, because what it leaves behind doesn't rinse out on its own. A test of your vehicle follows at the end, after fresh diesel goes in and your filter gets flushed or, if necessary, replaced. If your motor hasn't run, most jobs take about half an hour once our technicians arrive. The equipment is explosion-proof, and so a live forecourt is no problem, and it's quiet enough for a residential street after dark.
Fresh diesel goes in to bleed your system, and that is the final step. At that point we start it and you drive off, whether from a parking bay outside St Columb Road or a drive in Trethosa. Our engineers check it runs correctly on new diesel before leaving. No workshop is needed at any stage, with the entire job done then and there. Afterwards, there is the paperwork for the insurer: a VAT invoice plus a written report from the engineer.
About Trethosa, for a moment
Trethosa is a small hamlet in Cornwall, situated inland at an elevation of 114 metres, approximately 9 miles from the city of Truro. Trethosa lies near other rural settlements such as Stepaside, Treneague, and Terras, and is characterized by its predominantly detached housing stock. Trethosa is a relatively small community, with a population of around 542 residents, and is located about 222 miles west of London.
Trethosa and Cornwall: AdBlue drains across the area
Over the PL postcode area, the vans answering AdBlue jobs around Trethosa reach most of Cornwall as well, Stepaside, Treneague and Terras included. Near a boundary, or anywhere awkward to explain? Asking beats guessing, so phone.
Wherever the car sits — your drive at home, a residential street, a parking area, a forecourt — our engineers drain it on the spot, with no need to bring it to us; which suits Trethosa, a rural hamlet, well.
What does AdBlue in a diesel tank cost to sort out in Trethosa?
Since each callouts differ, a flat figure would not be honest. The cost shifts first with how long, if at all, your engine has been running, and next with the quantity of AdBlue that got in. After that it turns on where the vehicle is and whether a technician can get to it safely, which is easier on an open driveway than in a tight space behind St George.
Which fluid got in, how much, and if the engine ran: every Trethosa enquiry opens by asking precisely those, ahead of a figure, not after. When those are answered, a range becomes one firm figure.
The quote is quoted during the call, before a van sets off; settling up happens on the day, by card or by phone, with nothing upfront. While our engineer is travelling, check your insurance: many include misfuelling.
Still alongside your car in Trethosa?
Leaving the vehicle alone is, right now, the best move you can do. Keys out; engine and ignition off. Petrol in Diesel handles the rest, in Trethosa or anywhere within Cornwall, once you call 0333 366 0103 to say it was AdBlue, roughly what quantity, and if it ran.