You’ve almost certainly previously heard of the well-known EGR valve, the anti-pollution valve. It is not generally appreciated by drivers because it has a tendency to create more trouble than anything else… In fact, based on the use you are going to make of your car, it can become blocked and trigger you a lot of concerns. If this is the case, you are almost certainly concerned about how to clean the EGR valve of your Mercedes Benz CLS Class ? Don’t worry, we’ve written this article to help you with this task. To achieve this, we will initially check out the intent of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz CLS Class can trigger and at last the section that will almost certainly appeal you the most, how to clean the EGR valve Mercedes Benz CLS Class?
How to Clean your Mercedes Benz CLS Class EGR Valve: Role and Operation
Goal of the EGR valve
The EGR valve of your car has been integrated to diesel engines mainly to lower pollution released by cars and to match EURO requirements on Mercedes Benz CLS Class . It will as a result influence the quality of exhaust gas output and get rid of toxic particles, mainly Nitrogen Oxide.
Operation of the EGR valve
Before we learn how to clean the EGR valve on your Mercedes Benz CLS Class , we will take a look at how it works. As seen 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 get rid of all unburned toxic particles. It will run mainly at low speed because at high speed the combustion is sufficient to burn all these gases.
How to clean your Mercedes Benz CLS Class EGR valve: Identifying faults
The EGR valve, despite the fact very beneficial to limit the pollution emissions of your Mercedes Benz CLS Class , will unfortunately tend to clog up because of soot/gas deposits that will accumulate in its system, which will inevitably risk blocking the operation of the valve, until entirely blocking the engine unit, here are the signs of illness that a defective EGR valve on your Mercedes Benz CLS Class can provoke:
- Motor light on
- Performance loss
- Technical assesment refused
- Black gases
- Automobile that grazes at low speed
- Low RPM settings
How to clean your Mercedes Benz CLS Class EGR valve: In practice
And now we’ll commence the section you are most interested in, how to clean the EGR valve of your car. Here are the two techniques that you can use.
Do it on your own
How to clean your Mercedes Benz CLS Class EGR valve system: Without dismantle
Despite the fact this approach is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, actually, you will only need to use fuel additives, equivalent to the products used to clean the injection. These specific 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 Mercedes Benz CLS Class.
How to clean your car EGR valve: With disassembly
Here is the most efficient approach, which will require sufficient access to the EGR valve to accomplish the process on your own. 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 guidelines are done, now comes the time for cleaning. To accomplish 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 also 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 CLS Class.
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 Mercedes Benz CLS Class? 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 carry out 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 Mercedes Benz CLS Class
At last, some people make a more radical decision to limit the risk of a failed valve. Instead of cleaning the EGR valve of their Mercedes Benz CLS Class, they just prefer to block it in the closed position. This treatment will have the effect of greatly increasing the pollution released by the car, of no longer complying with pollution requirements, 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 be reluctant to check out our dedicated page.
If you have any additional questions about the Mercedes Benz CLS Class, do not hesitate to consult our Mercedes Benz CLS Class category.
