Why It Happens and How to Prevent It: AdBlue in a Diesel Tank in Graig Trewyddfa
Leave your engine and ignition off then ring 0333 366 0103 now — the rest can wait when AdBlue is already in the diesel tank. Normally, when your motor has not turned, it is emptied and thoroughly rinsed where the car is around Graig Trewyddfa. Reading in advance? In that case the rest explains how it comes about and how to prevent it happening at all.
Why does AdBlue in a diesel vehicle need its own filler?
Many current diesels on the roads around Graig Trewyddfa and Mynydd-Garn-Lwyd carry two liquids, not one. Diesel goes to the engine. Your exhaust, not your motor, is where AdBlue ends up: dosed into the fumes to clean it, from its own tank.
Each tank has one filler of its own. Under one flap, side by side: that is the arrangement on many vehicles. Elsewhere, AdBlue's filler is under the bonnet or in the boot instead. Topping up the diesel side at the petrol pump goes on constantly. Someone who has to stop and think where it goes usually tops up the AdBlue side, from a bottle, and much less commonly. The error lives in that gap.
How does AdBlue in your diesel tank happen in Graig Trewyddfa?
It is seldom carelessness. Three things tend to line up.
The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out altogether, the vehicle drops into limp mode. So the top-up is done in a hurry: on a drive off Parc Terrace before work, or in the car park outside The Champion Brewers on the way home.
Then your car is strange. A hire car, a new motor or a company car puts the fillers where your last one didn't, and your hand gets to for the cap it would have used on the old one.
A spout-topped bottle finds no obstacle at a diesel filler any more than at an AdBlue one. And so the pour, after started, keeps on. It's a few seconds, whether out in Plas-Marl or right in the centre of Graig Trewyddfa.
How to tell the AdBlue filler from the diesel one
Look at these before pouring, on a forecourt around Graig Trewyddfa or a drive out in Felin Newydd. A few seconds, no more.
- Read the cap instead of going by where it sits: AdBlue ones are commonly blue or marked "AdBlue", and diesel caps usually are not.
- The size. On plenty of vehicles the AdBlue filler neck is the smaller of the two.
- Check inside your fuel flap: many vehicles carry a label there showing which fuel goes where.
- In the boot or under the bonnet: that is where your filler sits if it is not by the diesel cap, and the handbook says which.
- The person who drove the car last. On a hire or company car collected from somewhere like the car park outside Llansamlet, ask before you leave, not when the light comes on.
Keeping AdBlue out of your diesel tank when you top up
The day the light comes on, wherever across Swansea, use this routine.
- Switch off after you park — flat ground, engine stopped, and never in a rush by Neath Road at the roadside.
- Find the AdBlue filler, check the cap, and speak the name "AdBlue" aloud as you unscrew it. It seems daft. It works.
- If both sit under one flap, check the diesel cap is still closed before you lift the bottle — then leave it on.
- Gently does it, through the bottle's own spout, until it is full or the bottle runs out.
- Before starting your car, shut the cap and check again that the diesel cap was never opened off.
Discover during the second or third stage that the bottle went into the wrong filler? That is where you stop. Step five stays off limits.
Graig Trewyddfa: already put AdBlue in the diesel tank?
Then the order of things is short. Do not start your engine. On many diesels the ignition alone runs the fuel pump, so don't switch the car on. AdBlue does not mix with diesel — it sinks to the bottom of the tank, where the fuel is sucked from — so do not top up with diesel to thin it.
The attendants at Asda, Texaco or any forecourt will usually lend a hand to push the vehicle away when you ask. On your own drive around Graig Trewyddfa? So the car remains where it is.
When the motor has been run by now, pull over safely and switch the car off. On the M4, under 3 miles from Graig Trewyddfa, that means the next exit. Roughly how far did it go? Crossing Graig Trewyddfa is smaller work than a trip of under 3 miles to Swansea, so say.
Graig Trewyddfa: what happens when our technicians arrive
Outside the local primary school, near The Salvation Army or on your own driveway: wherever your car has stopped, we come to it. Our engineers ask what went in, roughly how much, and if it has run, because the answers determine the work and our quote. During the phone call itself, you are told our price — before anything else.
Then your tank is emptied and the system cleaned thoroughly. Unlike petrol, AdBlue forms crystals and attacks some fuel-system metals, and neither washes away unaided. That is why it matters more. A test comes last: before that, fresh diesel is added, and your filter is flushed or replaced as needed. Then our engineers start the car and check it runs properly before we leave.
If the motor hasn't run, the majority of jobs take about half an hour once we're there, using pumps that are fine on a working forecourt and quiet enough to use outside a house after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. It is worth checking your insurance as the van travels to you: misfuelling cover is included with plenty of policies.
About Graig Trewyddfa, for a moment
Graig Trewyddfa is a suburban area located on the coast near Swansea, with a mix of terraced housing and local amenities. Graig Trewyddfa sits at an elevation of 27 metres, close to nearby places such as Plas-Marl and Morriston. Graig Trewyddfa is situated approximately 2.6 miles from Swansea city centre, making it a convenient residential location. Graig Trewyddfa has a population of around 2534 people, according to recent estimates.
AdBlue drains round Graig Trewyddfa, and Swansea beyond
Being a residential suburb, Graig Trewyddfa shares its vans surrounding places — Morriston, Cnap-Llwyd — all the way across SA postcodes and the surrounding area beyond. Our van reaches you fastest with a postcode starting SA6 8.
The vehicle doesn't need to shift. Wherever it sits — near Saint John, on a layby heading to Parc Llewellyn, at home — that's where it gets drained. Ring and ask instead of guessing if you're near a boundary, or somewhere hard to describe, like the back of Tabernacle.
The short version for Graig Trewyddfa people
Read the cap before you tip. If AdBlue has gone in your diesel tank regardless, leave the car off then call 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere in Swansea.