--- title: AdBlue in a Diesel Tank Coombeswood? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/coombeswood-west-midlands/ location: Coombeswood county: West Midlands latitude: 52.464250 longitude: -2.045580 service: AdBlue in a Diesel Tank updated: 2026-10-07 --- # AdBlue in a Diesel Tank in Coombeswood: How It Occurs and How to Avoid It Stop reading for a moment when your diesel tank already has AdBlue in it: ignition off, engine off, then call 0333 366 0103. In Coombeswood, finding it before the engine turns normally means a drain and a full flush on the spot. Here before the event? In that case the rest explains how it comes about and what to prevent it happening at all. ## Two fillers, two tanks: AdBlue in a diesel vehicle Diesel goes to your motor — yet plenty of current diesels seen about Coombeswood and Blackheath carry another liquid too. Stored in a tank of its own, AdBlue is sprayed into the exhaust stream and cleans it. Each tank has its own filler. Other motors put the AdBlue filler in the boot or under the bonnet; plenty of others have both together behind one flap. Diesel goes in on each filling station call-out, week in, week out. Far less frequently, the AdBlue side is topped up — normally from a bottle, by someone thinking about where it goes. That gap is where the error lives. ## Coombeswood: how AdBlue in your diesel tank happens It's rarely carelessness. Three things tend to line up. The warning comes first. As AdBlue runs low the car tells you, and if it runs out completely, the vehicle goes into limp mode. So the top-up is done in a hurry: on a driveway off Steel Park Road before work, or in the car park at The Lighthouse on the way home. New-to-you cars come next, too. Rentals, new cars and company vehicles place their fillers in new places, and the hand goes for the cap used on the old one. Nothing stops the tip after it has started, since a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Whether it takes place in Haden Cross or the middle of Coombeswood, it's the same few seconds. ## The AdBlue filler and the diesel filler: telling them apart Before you pour anything, whether on a drive in Hawne or a forecourt around Coombeswood, check these. They take a few seconds. - Colour and lettering: an AdBlue cap is frequently blue, or says "AdBlue", where a diesel cap normally does not. Trust the cap, not where it sits. - The size. On many cars the AdBlue filler neck is the smaller of the two. - Check inside your fuel flap: many cars have a label there showing which fuel goes where. - In your boot or under the bonnet: that is where the filler is if it is not by the diesel cap, and the handbook says which. - Picking up a hire or company car, say at the car park at Old Hill? Check with whoever drove the car last before leaving, rather than once the light goes on. ## How to top up without AdBlue in your diesel tank A routine for the day the light comes on, wherever in West Midlands that is. - Switch off once parked — level ground, motor stopped, and never in a rush by Coombs Road at the roadside. - Find the AdBlue filler, read the cap, and speak the name "AdBlue" out loud as you unscrew it. It seems silly. It works. - The diesel cap stays on. When the two share a flap, make sure it is shut before the bottle comes up. - Slowly is best, through the bottle's own spout, until it is full or the bottle is empty. - Close the cap and check again. Make sure the diesel cap was never opened. Only then start your car. Stop there if you find, at stage two or three, that you have already poured into the diesel side. Never go on to stage five. ## Put AdBlue in your diesel tank in Coombeswood already? Do not start your engine: that's where the short order of things begins. Leave the ignition off too, since on many diesels it alone runs your fuel pump. Don't top up with diesel to dilute it: AdBlue does not mix with diesel, it sinks to the bottom of the tank, where the fuel is drawn from. If you're on a forecourt, whether it's the Sainsbury's or the BP, ask the attendants to help roll the vehicle clear of the pump. On your own drive around Coombeswood? So the car stays put. If your motor has already run, stop as soon as it is safe and switch off. Coombeswood sits under 3 miles from the M5; there, use the next exit. Tell us roughly how far it went: a run towards Birmingham, under 10 miles away, is a bigger job than a short hop across Coombeswood. ## When our technicians arrive in Coombeswood, what occurs? By Olive Hill Primary Academy, close to The site of Stewart and Lloyds 1903-67 or on your own drive: wherever the car has stopped, our technicians come to it. Those answers decide the work and the quote, so we ask what was put in, about how much, and if it's run. You get that quote on the phone, before anyone heads out. Your system is then rinsed thoroughly, once the tank is cleared. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. After your filter has been cleaned — or renewed, if needed — clean diesel is added, and then the car gets tested. We do not go until it has been started and is running correctly. Using pumps safe on a working forecourt and quiet enough for use outside a house at night, most jobs in which your engine hasn't run take about half an hour after we are there. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. While we travel, take a look at your policy; plenty include cover for misfuelling. ## About Coombeswood and where it is Coombeswood is a suburban area in the West Midlands, situated near the River Rea and close to the city of Birmingham. Coombeswood has a mix of housing types, but semi-detached homes are the most common, and its riverside setting provides a distinctive character. Coombeswood is located about 6 miles from Birmingham city centre, making it a convenient residential area for commuters. Coombeswood sits at an elevation of around 143 metres above sea level, in a region of gentle slopes and valleys. ## AdBlue drains round Coombeswood, and West Midlands beyond Hill and Cakemore and Short Cross are among the towns around Coombeswood, a residential suburb, that the same vans cover, throughout B postcodes. Quickest of all: quote a B62 8 postcode for our van. Your car remains put. The drain takes place right there, whether a driveway, a street by The Flame Community Church, or a layby towards Black Country Millennium Forest. If you're close to a border, or somewhere hard to describe like the back of Bethel Church, ring and ask instead of assuming. ## Coombeswood people: the short version Before you pour, read the cap. AdBlue in your diesel tank regardless? Keep the car off and ring 0333 366 0103; Petrol in Diesel drains it where it stands, across West Midlands.