You’ve most likely previously been aware of the renowned EGR valve, the anti-pollution valve. It is not usually appreciated by car owners because it tends to cause more problems than anything else… In actual fact, depending on the use you are going to make of your vehicle, it can become blocked and bring about you a lot of concerns. If this is the situation, you are most likely wanting to know how to clean the EGR valve of your Mercedes Benz M Class ? Don’t stress, we’ve written this content to help you with this procedure. To achieve this, we will initially check out the purpose of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz M Class can reason and at last the part that will most likely interest you the most, how to clean the EGR valve Mercedes Benz M Class?
How to Clean your Mercedes Benz M Class EGR Valve: Role and Operation
Goal of the EGR valve
The EGR valve of your car has been added to diesel engines principally to lower pollution released by cars and to meet EURO requirements on Mercedes Benz M Class . It will therefore influence 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 Mercedes Benz M Class , we will have a look at how it works. As seen before, its mission is to clean the exhaust gases, so it will be located 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 run mostly at low speed because at high speed the combustion is sufficient to burn all these gases.
How to clean your Mercedes Benz M Class EGR valve: Identifying faults
The EGR valve, even though very useful to limit the pollution emissions of your Mercedes Benz M Class , will regrettably tend to clog up because of soot/gas deposits that will accumulate in its mechanism, which will finally risk blocking the functions of the valve, until totally blocking the engine, here are the symptoms that a faulty EGR valve on your Mercedes Benz M Class can provoke:
- Motor light on
- Power loss
- Technical assesment refused
- Black gases
- Car that grazes at low speed
- Low RPM settings
How to clean your Mercedes Benz M Class EGR valve: In practice
And now we’ll start the part you are most curious about, how to clean the EGR valve of your car. Here are the two approaches that you can use.
Do it on your own
How to clean your Mercedes Benz M Class EGR valve system: Without dismantle
Although this approach 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 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 Mercedes Benz M Class.
How to clean your car EGR valve: With disassembly
Here is the most reliable approach, which will require sufficient access to the EGR valve to execute the operation 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 achieved, 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 Mercedes Benz M Class.
Have it done by a professional
If, your EGR valve is not reachable 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 Mercedes Benz M Class? In such a case, it would be better rather than launching yourself into an overly complex procedure, you turn to an auto mechanic. He will be able to do the job more cleanly and will be able, if necessary, to change the valve if it is dead. The cost of cleaning depending on the difficulty of access is between 70 and 300 €.
Remove the EGR valve of your Mercedes Benz M Class
Finally, some people make a more radical decision to limit the risk of a failed valve. Rather than cleaning the EGR valve of their Mercedes Benz M Class, they simply choose to block it in the closed position. This manipulation will have the consequence of greatly increasing the pollution released by the vehicle, of no longer complying with pollution standards, of having an engine warning light all day on and ultimately risk fouling the engine. We strongly suggest against making this choice. If you have other questions or want to learn more about your car, don’t think twice to check out our dedicated page.
To get more tips on the Mercedes Benz M Class, take a look at the Mercedes Benz M Class category.
