You’ve likely already heard about the well-known EGR valve, the anti-pollution valve. It is not always appreciated by car owners because it tends to develop more concerns than anything else… In truth, based on the use you are going to make of your vehicle, it can become congested and cause you a lot of problems. If this is the situation, you are likely concerned about how to clean the EGR valve of your Audi Q7 ? Don’t be anxious, we’ve well prepared this article to help you with this task. To do this, we will initially check out the purpose of the EGR valve, then what are the failures that the EGR valve of your Audi Q7 can bring on and finally the section that will likely appeal you the most, how to clean the EGR valve Audi Q7?
How to Clean your Audi Q7 EGR Valve: Role and Operation
Role of the EGR valve
The EGR valve of your car has been integrated to diesel engines mostly to lower pollution emitted by vehicles and to fulfill EURO measures on Audi Q7 . It will as a consequence control the quality of exhaust gas output and eliminate toxic particles, mainly Nitrogen Oxide.
Operation of the EGR valve
Before we discover how to clean the EGR valve on your Audi Q7 , we will check out how it functions. As seen just before, its task 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 eliminate all unburned toxic particles. It will perform mostly at low speed because at high speed the combustion is enough to burn all these gases.
How to clean your Audi Q7 EGR valve: Identifying faults
The EGR valve, nevertheless very beneficial to limit the pollution emissions of your Audi Q7 , will sadly tend to clog up because of soot/gas deposits that will build up in its system, which will finally risk obstructing the operation of the valve, until totally blocking the engine unit, here are the signs of illness that a faulty EGR valve on your Audi Q7 can provoke:
- Motor light on
- Power loss
- Technical inspection rejected
- Black gases
- Automobile that grazes at low speed
- Low RPM settings
How to clean your Audi Q7 EGR valve: In practice
And now we’ll begin the section you are most excited about, how to clean the EGR valve of your car. Here are the two methods that you can use.
Do it on your own
How to clean your Audi Q7 EGR valve system: Without dismantle
Nevertheless this procedure 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, similar 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 Audi Q7.
How to clean your car EGR valve: With disassembly
Here is the most efficient procedure, which will require enough access to the EGR valve to perform the process on your own. If so, the operation 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 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 Audi Q7.
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 parts that hinder access for example), how to clean the EGR valve of your Audi Q7? In this instance, it would be better rather than launching yourself into an overly complex task, you turn to an auto mechanic. He will be able to perform the job more cleanly and will be able, if necessary, to change the valve if it is dead. The cost of cleaning based on the difficulty of access is between 70 and 300 €.
Remove the EGR valve of your Audi Q7
At last, a number of people make a more radical decision to limit the risk of a failed valve. Instead of cleaning the EGR valve of their Audi Q7, they just prefer to block it in the closed position. This manipulation will have the effect of greatly increasing the pollution emitted by the vehicle, of no longer complying with pollution criteria, of having an engine warning light permanently on and eventually 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 discover more tips on the Audi Q7, take a look at the Audi Q7 category.
