AdBlue in a Diesel Tank in Pen-y-lan? Don't Start It
If AdBlue has got into the diesel tank, keep your motor off then keep your ignition off. Urea mixed in water is what AdBlue is. As it is water-based, it will not ignite and won't blend with diesel; damage only starts once your pump starts drawing it. A drain and a thorough flush, done where your car is around Pen-y-lan, is usually what AdBlue in a diesel tank needs — if it is caught before the motor has run. First, call us on 0333 366 0103.
Those opening minutes: AdBlue in the diesel tank in Pen-y-lan
Do these:
- So nobody can turn your ignition on, take your keys out.
- If you are at all near moving traffic, put the hazard lights on.
- So you can give us which fluid it was and roughly what quantity, keep your receipt or the empty bottle.
- Call us from where you are. A postcode starting CF23 5, or the name of the closest street, gets our van to you without a search.
Do not do these:
- No starting the engine — not for a second, not to reposition your vehicle.
- Many diesels power their fuel pump the moment your ignition comes on, and so keep the vehicle off.
- Do not top up with diesel to thin it. AdBlue does not dilute in diesel; it separates out.
- Leave it where it is instead of driving it anywhere, even a short way along Greenlawns.
- Don't try to drain it yourself at the kerbside.
On a forecourt around Pen-y-lan, whether it is the Sainsbury's or another one, ask the attendants to help you roll your car away from the petrol pump. At your own driveway, do not move it at all.
AdBlue in a diesel tank, and what it does there
AdBlue is made for your exhaust, not the engine. Its own reservoir keeps it, and from there it is fed into the exhaust, and there it cleans the gas. Nothing in an injection pump is designed for this liquid — and no part of that was meant to go through one.
It does not blend. Once it's tipped into the tank, AdBlue behaves not at all like fuel. It's heavier than diesel, and so it sinks and collects at the bottom of that tank, which is where the pickup draws fuel from. Simplest of all: a vehicle that had AdBlue in Cyncoed overnight and hasn't been started since. The AdBlue waits at the foot of the tank, untouched — though it would be first through if your engine starts, before any diesel at all.
Once it is sucked in, the harm comes in two forms. It attacks certain metals found in fuel systems, working on whatever it touches until it is removed completely. And once the water goes, the urea forms crystals that clog filters and settle in tiny channels. A car left sitting in Pen-y-lan with AdBlue already in its lines is worse by the morning; one with AdBlue just in its tank isn't. And there's the water: it offers no protection to the parts that rely on it most — the injection pump and each injector.
Petrol or AdBlue in a diesel: why AdBlue is commonly worse
Put petrol in a diesel at the Morrisons and you have an issue of thin fuel. It mixes with your diesel, and while it is in your tank it causes no damage; the damage comes from running your engine on it.
AdBlue in a diesel is another matter: not thin fuel, but no fuel at all. It can't just be run through, since it doesn't burn. Nor can it be thinned, because it separates again — and the following tankful will not rinse away crystals or corrosion. So the flush matters more here, and turning your key "to see", in the heart of Pen-y-lan or out in Cathays, does more harm than nearly any other slip.
The same good news holds as with petrol. Clearing a tank is the easiest job on a fuel system, and without running, the AdBlue remains in there — anywhere across Cardiff your car has stopped.
How does AdBlue end up in a diesel tank in Pen-y-lan?
Plenty of motors place the AdBlue filler beside the diesel cap, now and then under one flap, and in dim light the two can look identical. Nobody intends it. Mostly it happens with a bottle bought on the way home and poured in on the drive, not at the pump.
It tends to happen in a few familiar ways. A warning light comes on during the school run, and the top-up happens in a hurry outside the local primary school. A bottle is poured in at the end of the day on a drive just off Cyncoed Road. Another version: darkness, a pub car park by The Albany, and someone opening that flap the first time.
It happens most in the cars drivers know least: a hire car, a new car, a company car, or the second vehicle of a household with one diesel and one petrol. Anywhere across Cardiff, Pen-y-lan included, the mistake doesn't change, and nor does the first response: keep it switched off.
Started the motor with AdBlue in the diesel tank in Pen-y-lan?
Then the AdBlue has left the tank. The filter and pipework have had it pulled along, and some running time takes it on to the injection pump and each injector.
You may see your engine running unevenly, smoking, losing power, showing warning lights or cutting out, possibly on the way back from Cyncoed Gardens or halfway across Pen-y-lan. When safe, pull over and turn it off — without restarting to test. With each start, more of it is pulled through.
If you were on the A48(M), under 3 miles from Pen-y-lan, come off at the next exit and stop somewhere sensible rather than pressing on.
Each mile carries the AdBlue further in. That's why a hop across Pen-y-lan to park beside Cardiff United Synagogue and a drive of under 3 miles towards Cardiff are very separate jobs. Roughly how far it had come is worth telling us.
Wherever your car came to a stop is where all of it gets done, even with more to flush once the engine has been run. If it's spotted soon, long-term damage is very uncommon.
Emptying AdBlue in a diesel around Pen-y-lan: what it takes
The vehicle remains put, whether that's a street near Sports Hall, a drive, a lay-by or a forecourt around Pen-y-lan, and the van comes to it. The work depends on three answers, and our engineers ask for first — what got in, the amount, and if your motor has turned over.
On the spot, your tank is then drained, and both the polluted diesel and the urea come out as one. Your system is flushed thoroughly, which matters more with AdBlue than with petrol, since what it leaves behind does not rinse out on its own. Testing the car follows at the end, after clean diesel is added and the fuel filter is flushed or, where necessary, replaced. If your motor hasn't run, the majority of jobs take about half an hour once our engineers arrive. Quiet enough to use outside a house at night, and safe on a busy forecourt, our pumps are explosion-proof.
Fresh diesel goes in to bleed the fuel system, and that's the final step. You drive off as soon as our engineers have fired it up, and it makes no difference whether your car is on a driveway in Pen-y-lan or in a bay outside Cathays. The check before we head off is that it runs properly on new diesel. Our engineers do it all wherever the car has stopped, and it never has to be taken to a workshop. Insurers want a VAT invoice and an engineer report, and you get both at the end.
About Pen-y-lan
Pen-y-lan is a suburban area in Cardiff, situated near the coast and approximately 1.8 miles from the city centre. Pen-y-lan sits at an elevation of 56 metres, overlooking the surrounding area, and is close to nearby places such as Roath, Llanedeyrn, and Roath Park. Pen-y-lan is characterised by its predominantly semi-detached housing stock, which reflects the area's residential nature. Pen-y-lan is also relatively close to the Welsh capital's amenities, while being far enough from London, at 130.4 miles away, to maintain a distinct local identity.
AdBlue drains across Cardiff, Pen-y-lan included
Over the CF postcode area, the teams taking AdBlue jobs in Pen-y-lan serve most of Cardiff as well, Roath, Llanedeyrn and Roath Park among them. Near a border, or somewhere tricky to explain? Checking is better than guessing, so ring.
No towing is needed. In Pen-y-lan, a residential suburb, a mobile service works: the car is drained where it stands, whether on a drive, a side street, a parking area or a filling station.
AdBlue in a diesel tank in Pen-y-lan: the cost of fixing it
Because the jobs differ, a single figure wouldn't be fair. Three things move the price: whether your engine has been running and for how long, how much AdBlue got in, and where the car is. That last one comes down to whether a technician can get to it safely, and an open driveway is simpler than a tight space behind Tennis Centre.
That is why every call from Pen-y-lan starts with the same three questions, asked before giving a figure, not after: what got in, how much, and whether it has run. With them, the range narrows to a single fixed figure.
Priced by phone before the van sets out, it is paid for on the day — card or phone, no deposit. Misfuelling cover comes with plenty of insurance policies, so it pays to look at yours before the van arrives.
Alongside the vehicle in Pen-y-lan, right now?
Then the most useful thing you can do is nothing to the vehicle. Keys out; engine and ignition off. Call 0333 366 0103 and tell us it's AdBlue, roughly how much, and if it has run. Petrol in Diesel takes it from there, in Pen-y-lan or anywhere around Cardiff.