You’ve probably previously heard of the renowned EGR valve, the anti-pollution valve. It is not generally appreciated by car owners because it tends to develop more concerns than anything else… In reality, determined by the use you are going to make of your car, it can become blocked and trigger you a lot of problems. If this is the case, you are probably wondering how to clean the EGR valve of your Land Rover Discovery Sport ? Don’t get worried, we’ve made this article content to help you with this task. To do so, we will first check out the intent of the EGR valve, then what are the failures that the EGR valve of your Land Rover Discovery Sport can provoke and finally the section that will probably appeal you the most, how to clean the EGR valve Land Rover Discovery Sport?


How to Clean your Land Rover Discovery Sport EGR Valve: Role and Operation

Role of the EGR valve

The EGR valve of your car has been added to diesel engines mostly to lower pollution released by vehicles and to meet EURO measures on Land Rover Discovery Sport . It will consequently control the quality of exhaust gas output and eradicate toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we learn how to clean the EGR valve on your Land Rover Discovery Sport , we will have a look at how it works. As described just before, its objective is to clean the exhaust gases, so it will be placed at the engine outlet, thanks to a valve, it will be able to return the unburned exhaust gases to the engine for a second burn which will eradicate all unburned toxic particles. It will work principally at low speed because at high speed the combustion is enough to burn all these gases.

How to clean your Land Rover Discovery Sport EGR valve: Identifying faults

The EGR valve, although very useful to limit the pollution emissions of your Land Rover Discovery Sport , will unfortunately tend to clog up because of soot/gas deposits that will build up in its system, which will inevitably risk obstructing the functions of the valve, until totally blocking the engine unit, here are the signs of illness that a faulty EGR valve on your Land Rover Discovery Sport can trigger:

  • Motor light on
  • Performance loss
  • Technical assesment refused
  • Black gases
  • Vehicle that grazes at low speed
  • Low RPM settings

How to clean your Land Rover Discovery Sport EGR valve: In practice

And now we’ll commence the section you are most curious about, how to clean the EGR valve of your car. Here are the two techniques that you can use.

Do it yourself

How to clean your Land Rover Discovery Sport EGR valve system: Without dismantle

Despite the fact this process is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, in reality, you will only need to use fuel additives, equivalent to the products used to clean the injection. These particular solutions must be injected into the running engine, at the right operating temperature, diluted in about 20 litres of fuel and run the engine for 3 or 4 minutes in high rev to clean the EGR valve of your Land Rover Discovery Sport.

How to clean your car EGR valve: With disassembly

Here is the most efficient process, which will require enough access to the EGR valve to carry out the treatment without help. If so, the procedure is fairly simple. You will need to disconnect the electromagnet from the EGR valve, remove the few screws that hold it in place, and remove it. Once these steps are done, now comes the time for cleaning. To do this, you will need to use a product such as solvent, petrol, oven cleaning product, which you will leave to act for ten minutes, then scrape off the rest using a scraper, finish cleaning with wire brush. If you want to go further, you can as well clean the two conduits on which it is connected which may be scorched, for this, use a scraper and a vacuum cleaner to avoid dropping deposits in the conduits. You will only have to reassemble it and you will have finished cleaning the EGR valve of your Land Rover Discovery Sport.

Have it done by a professional

If, your EGR valve is not accessible because of the series or the engine of your car and if removing it would cause too many problems (removing too many parts that hinder access for example), how to clean the EGR valve of your Land Rover Discovery Sport? In this case, it would be better rather than launching yourself into an overly complex task, you turn to an auto mechanic. He will be able to do the job more cleanly and will be able, if required, to change the valve if it is dead. The cost of cleaning determined by the difficulty of access is between 70 and 300 €.

Remove the EGR valve of your Land Rover Discovery Sport

At last, some people make a more radical decision to limit the risk of a failed valve. Rather than cleaning the EGR valve of their Land Rover Discovery Sport, they just prefer to block it in the closed position. This modification will have the result of greatly increasing the pollution released by the car, of no longer complying with pollution criteria, of having an engine warning light all day on and finally risk fouling the engine. We strongly advise against making this choice. If you have other questions or want to learn more about your car, don’t hesitate to check out our dedicated page.

To get more tips on the Land Rover Discovery Sport, take a look at the Land Rover Discovery Sport category.