Avoiding AdBlue in a Diesel Tank in Clwydyfagwyr: Why It Occurs
Stop here for a moment when your diesel tank already has AdBlue in it: ignition off, engine off, then ring 0333 366 0103. Usually, if your engine hasn't run, it is drained and thoroughly flushed where the car is around Clwydyfagwyr. If you're reading before it has happened, the remainder of this page is about why it happens and how to make sure it doesn't.
Why does AdBlue in a diesel motor need its own filler?
Plenty of modern diesels around Heolgerrig, like those in Clwydyfagwyr, carry on two fluids; your motor gets just the diesel. AdBlue's own tank holds it, and from there it goes to the exhaust, and there a spray treats the gas.
Each tank comes with one filler of its own. Under one flap, next to each other: that's the layout on a lot of cars. On others, AdBlue's filler is under the bonnet or in your boot instead. Filling your diesel side at the pump happens all the time. The AdBlue side is filled far less often, usually from a bottle, and usually by somebody who has to stop and think where it goes. The mistake lives in that gap.
How AdBlue in your diesel tank takes place around Clwydyfagwyr
Carelessness seldom causes it. Instead is three things coming up at once.
Hurry comes from the warning. The vehicle tells you as AdBlue runs low, and an empty tank sends the vehicle into limp mode — so the top-up gets done in a rush, before work on a driveway off Waunbant, or on the way home in the car park outside Station Hotel.
Next, your hand reaches for the cap it knew on the old motor — since a rental car, a new motor or a company car places the fillers where your last one did not.
And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the tip after it has started. It's seconds, whether in Gellideg or right in the heart of Clwydyfagwyr.
The AdBlue filler and the diesel filler: telling them apart
A few seconds is all the checks take — so check them before you tip anything, on a drive in Williamstown or a forecourt around Clwydyfagwyr.
- Where it sits can mislead; the cap doesn't. AdBlue ones are often blue or carry the name "AdBlue" — diesel caps normally don't.
- On plenty of vehicles, size gives it away: AdBlue has the smaller filler neck.
- A label inside the fuel flap often says which fuel goes where, on plenty of cars. Look for it.
- The handbook shows which it lives if the filler isn't next to your diesel cap: your boot, or under the bonnet.
- The person who drove the car last. On a hire or company car collected from somewhere like the car park at Merthyr Tydfil, ask before you leave, not when the light comes on.
Topping up AdBlue without it reaching your diesel tank
On the day the warning appears — wherever you are around Merthyr Tydfil — a routine to use.
- Turn off after you park — level ground, motor off, and never in a rush beside Old Winch Fawr Road at the roadside.
- Locate the AdBlue filler, check the cap, and say the word "AdBlue" aloud while you unscrew it. It seems daft. It works.
- The diesel cap remains on. Where the two sit under a flap, confirm it's closed before the bottle comes up.
- Using the bottle's own spout, tip slowly — and stop when it is full or the bottle is empty.
- Before you start your car, shut the cap and check a second time that your diesel cap was never came off.
Stop there if you find, at step two or three, that you have already poured into your diesel side. Stage five is off limits.
Put AdBlue in your diesel tank in Clwydyfagwyr already?
Don't start the motor: that is where the short order of things starts. The fuel pump starts on many diesels as soon as the ignition is switched on — and so leave it off. Do not top up with diesel to dilute it: AdBlue doesn't mix with diesel, it sinks to the bottom of the tank, where your fuel is sucked from.
If you are on a forecourt, whether it's the Applegreen or the Esso, ask the staff to help roll your car clear of the pump. Your own driveway around Clwydyfagwyr is the place it should stay.
Already started? Pull over when it's sensible, then turn off. The next exit means where to leave when you're on the M4, under 25 miles from Clwydyfagwyr. About how far did it go? Crossing Clwydyfagwyr is less a job than a run of under 25 miles towards Newport, and so say.
When our engineers get there around Clwydyfagwyr, what takes place?
Outside the local primary school, near Brithplace of Jennette Evelyn Evans or on your own drive: wherever the car has stopped, our engineers come to it. Those answers settle this work and the quote, and so our engineers ask what was put in, about how much, and if it's run. The price is given on the call, ahead of any van leaving.
After that: a drain, then a full flush of the entire system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it does not wash out on its own — which is why the flush matters more with AdBlue than with petrol. The fuel filter is cleaned, or replaced where it needs to be; fresh diesel goes in; and your car is tested. Then we fire it up and confirm it runs smoothly before leaving.
Unstarted vehicles usually mean a half-hour job after the moment we arrive. The kit is fine on a live filling station, and hushed enough for a residential street late at night. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. It's worth looking at your insurance as the van travels to you: misfuelling cover comes with many policies.
About Clwydyfagwyr, for a moment
Clwydyfagwyr is a suburban area situated in the county of Merthyr Tydfil, within the inland region of south Wales. Clwydyfagwyr sits at an elevation of 292 metres, overlooking the surrounding countryside. Clwydyfagwyr is characterised by its predominantly semi-detached housing stock, and is located near other local communities such as Gellideg and Cefn-coed-y-cymmer.
AdBlue drains round Clwydyfagwyr, and Merthyr Tydfil beyond
Clwydyfagwyr is a residential suburb, and our vans that cover it also work the places around it, Winchfawr and Cefn-coed-y-cymmer among them, across the CF postcode area. A postcode starting CF48 1 gets the van to you fastest.
Your car remains put. A driveway, a lay-by on the way to Kickabout, a side street near Trago: we drain the car where it stands. Guessing doesn't help at the back of Hen Dy Cwrdd, close to a border, or anywhere hard to describe; phone and ask.
The short version for Clwydyfagwyr drivers
Read the cap before you pour. Petrol in Diesel empties it on the spot, anywhere across Merthyr Tydfil, if AdBlue has gone in your diesel tank anyway — and so leave it off then ring 0333 366 0103.