How to clean my Mercedes Benz GLK EGR valve ?

You’ve most likely previously been aware of the renowned EGR valve, the anti-pollution valve. It is not generally appreciated by drivers because it has a tendency to develop more problems than anything else… In fact, based on the use you are going to make of your automobile, it can become blocked and cause you a lot of trouble. If this is the situation, you are most likely concerned about how to clean the EGR valve of your Mercedes Benz GLK ? Don’t worry, we’ve well prepared this content page to help you with this procedure. To achieve this, we will initially take a look at the intent of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz GLK can provoke and finally the section that will most likely interest you the most, how to clean the EGR valve Mercedes Benz GLK?

How to Clean your Mercedes Benz GLK EGR Valve: Role and Operation

Purpose of the EGR valve

The EGR valve of your car has been added to diesel engines mainly to reduce pollution emitted by cars and to meet EURO requirements on Mercedes Benz GLK . 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 discover how to clean the EGR valve on your Mercedes Benz GLK , we will have a look at how it operates. As seen before, its mission is to clean the exhaust fumes, 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 get rid of all unburned toxic particles. It will perform principally at low speed because at high speed the combustion is enough to burn all these gases.

How to clean your Mercedes Benz GLK EGR valve: Identifying faults

The EGR valve, even though very effective to limit the pollution emissions of your Mercedes Benz GLK , will sadly tend to clog up because of soot/gas deposits that will accumulate in its mechanism, which will eventually risk blocking the operation of the valve, until completely blocking the engine motor, here are the symptoms that a faulty EGR valve on your Mercedes Benz GLK can trigger:

  • Motor light on
  • Performance loss
  • Technical inspection rejected
  • Black fumes
  • Car that grazes at low speed
  • Low RPM settings

How to clean your Mercedes Benz GLK EGR valve: In practice

And now we’ll start the section you are most serious about, how to clean the EGR valve of your car. Here are the two methods that you can use.

How to clean your Mercedes Benz GLK EGR valve system: Without dismantle

Although this procedure is less effective, 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 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 GLK.

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 do the process 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 guidelines are carried out, 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 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 GLK.

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 complications (removing too many elements that hinder access for example), how to clean the EGR valve of your Mercedes Benz GLK? 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 accomplish the job more cleanly and will be able, if required, 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 GLK

At last, 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 GLK, they simply choose to block it in the closed position. This manipulation will have the result of greatly increasing the pollution emitted by the automobile, of no longer complying with pollution requirements, of having an engine warning light permanently on and finally 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 hesitate to take a look at our dedicated page.

If perhaps you have any further questions about the Mercedes Benz GLK, do not hesitate to consult our Mercedes Benz GLK category.