You’ve probably previously read about the renowned EGR valve, the anti-pollution valve. It is not generally appreciated by car owners because it has a tendency to cause more concerns than anything else… Indeed, determined by the use you are going to make of your car, it can become clogged and bring about you a lot of trouble. If this is the case, you are probably wondering how to clean the EGR valve of your Infiniti QX70 ? Don’t get worried, we’ve written this article content to help you with this procedure. To do this, we will initially look at the intent of the EGR valve, then what are the failures that the EGR valve of your Infiniti QX70 can cause and to finish the part that will probably concern you the most, how to clean the EGR valve Infiniti QX70?


How to Clean your Infiniti QX70 EGR Valve: Role and Operation

Role of the EGR valve

The EGR valve of your car has been added to diesel engines mostly to reduce pollution released by vehicles and to fulfill EURO standards on Infiniti QX70 . It will consequently control the quality of exhaust gas output and get rid of toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we discover how to clean the EGR valve on your Infiniti QX70 , we will have a look at how it functions. As seen just before, its task is to clean the exhaust fumes, so it will be installed 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 get rid of all unburned toxic particles. It will operate mainly at low speed because at high speed the combustion is enough to burn all these gases.

How to clean your Infiniti QX70 EGR valve: Identifying faults

The EGR valve, even though very effective to limit the pollution emissions of your Infiniti QX70 , will sadly tend to clog up because of soot/gas deposits that will build up in its mechanism, which will ultimately risk blocking the operation of the valve, until entirely blocking the engine motor, here are the signs of illness that a defective EGR valve on your Infiniti QX70 can cause:

  • Motor light on
  • Power loss
  • Technical inspection rejected
  • Black gases
  • Vehicle that grazes at low speed
  • Low RPM settings

How to clean your Infiniti QX70 EGR valve: In practice

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

Do it yourself

How to clean your Infiniti QX70 EGR valve system: Without dismantle

Although this approach is less effective, it is however possible to consider a “rough” cleaning of your EGR valve, in fact, you will only need to use fuel additives, similar 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 Infiniti QX70.

How to clean your car EGR valve: With disassembly

Here is the strongest approach, which will require enough access to the EGR valve to accomplish the operation on your own. If so, the operation is fairly easy. 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 guidelines are completed, now comes the time for cleaning. To achieve 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 canal 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 Infiniti QX70.

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 troubles (removing too many auto parts that hinder access for example), how to clean the EGR valve of your Infiniti QX70? In cases like this, it would be better rather than launching yourself into an overly complex procedure, you turn to an auto mechanic. He will be able to accomplish the job more cleanly and will be able, if necessary, 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 Infiniti QX70

At last, some individuals make a more radical decision to limit the risk of a failed valve. Rather than cleaning the EGR valve of their Infiniti QX70, they just choose to block it in the closed position. This modification will have the consequence 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 ultimately risk fouling the engine. We strongly recommend 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.

Whenever you have any further questions about the Infiniti QX70, do not hesitate to consult our Infiniti QX70 category.