You’ve likely already heard of the well-known EGR valve, the anti-pollution valve. It is not usually appreciated by motorists because it is likely to develop more problems than anything else… Indeed, according to the use you are going to make of your vehicle, it can become congested and cause you a lot of trouble. If this is the situation, you are likely wondering how to clean the EGR valve of your Mazda CX 9 ? Don’t worry, we’ve written this article content to help you with this operation. To do this, we will initially look at the goal of the EGR valve, then what are the failures that the EGR valve of your Mazda CX 9 can bring about and to finish the section that will likely interest you the most, how to clean the EGR valve Mazda CX 9?
How to Clean your Mazda CX 9 EGR Valve: Role and Operation
Role of the EGR valve
The EGR valve of your car has been added to diesel engines primarily to lower pollution emitted by vehicles and to meet EURO measures on Mazda CX 9 . It will as a result 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 Mazda CX 9 , we will take a look at how it operates. As described just before, its mission is to clean the exhaust fumes, so it will be positioned 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 work mostly at low speed because at high speed the combustion is sufficient to burn all these gases.
How to clean your Mazda CX 9 EGR valve: Identifying faults
The EGR valve, nevertheless very useful to limit the pollution emissions of your Mazda CX 9 , will unfortunately tend to clog up because of soot/gas deposits that will build up in its mechanism, which will ultimately risk obstructing the operation of the valve, until totally blocking the engine unit, here are the symptoms that a faulty EGR valve on your Mazda CX 9 can bring about:
- Motor light on
- Performance loss
- Technical assesment rejected
- Black fumes
- Automobile that grazes at low speed
- Low RPM settings
How to clean your Mazda CX 9 EGR valve: In practice
And now we’ll commence the section you are most serious about, how to clean the EGR valve of your car. Here are the two ways that you can use.
Do it on your own
How to clean your Mazda CX 9 EGR valve system: Without taking it apart
Although this technique is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, the truth is, you will only need to use fuel additives, equivalent to the products used to clean the injection. These specific products 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 Mazda CX 9.
How to clean your car EGR valve: With disassembly
Here is the most effective technique, which will require sufficient access to the EGR valve to accomplish the operation without help. 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 simple 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 even 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 Mazda CX 9.
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 auto parts that hinder access for example), how to clean the EGR valve of your Mazda CX 9? In this case, it would be better rather than launching yourself into an overly complex operation, you turn to an auto mechanic. He will be able to perform the job more cleanly and will be able, if required, to change the valve if it is dead. The cost of cleaning according to the difficulty of access is between 70 and 300 €.
Remove the EGR valve of your Mazda CX 9
Finally, a number of people make a more radical decision to limit the risk of a failed valve. Rather than cleaning the EGR valve of their Mazda CX 9, they simply prefer to block it in the closed position. This modification will have the outcome of greatly increasing the pollution emitted by the vehicle, of no longer complying with pollution standards, of having an engine warning light permanently on and ultimately risk fouling the engine. We highly advise against making this choice. If you have other questions or want to learn more about your car, don’t think twice to take a look at our dedicated page.
To discover more tips on the Mazda CX 9, take a look at the Mazda CX 9 category.
