You’ve likely previously heard of the well-known EGR valve, the anti-pollution valve. It is not usually appreciated by motorists because it is likely to cause more concerns than anything else… In truth, according to the use you are going to make of your automobile, it can become congested and cause you a lot of problems. If this is the situation, you are likely wondering how to clean the EGR valve of your GMC Terrain ? Don’t stress, we’ve prepared this article content to help you with this task. To accomplish this, we will first check out the intent of the EGR valve, then what are the failures that the EGR valve of your GMC Terrain can bring about and at last the section that will likely appeal you the most, how to clean the EGR valve GMC Terrain?


How to Clean your GMC Terrain EGR Valve: Role and Operation

Role of the EGR valve

The EGR valve of your car has been added to diesel engines principally to reduce pollution emitted by cars and to fulfill EURO requirements on GMC Terrain . It will as a result influence the quality of exhaust gas output and eradicate toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we discover how to clean the EGR valve on your GMC Terrain , we will have a look at how it works. As described before, its goal 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 eradicate all unburned toxic particles. It will perform principally at low speed because at high speed the combustion is sufficient to burn all these gases.

How to clean your GMC Terrain EGR valve: Identifying faults

The EGR valve, even though very effective to limit the pollution emissions of your GMC Terrain , will regrettably tend to clog up because of soot/gas deposits that will accumulate in its system, which will eventually risk blocking the functions of the valve, until entirely blocking the engine motor, here are the signs of illness that a defective EGR valve on your GMC Terrain can bring about:

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

How to clean your GMC Terrain EGR valve: In practice

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

Do it on your own

How to clean your GMC Terrain EGR valve system: Without dismantle

Nevertheless this technique is less effective, 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 particular 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 GMC Terrain.

How to clean your car EGR valve: With disassembly

Here is the most beneficial technique, which will require sufficient access to the EGR valve to execute the treatment yourself. If so, the process 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 carried out, 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 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 GMC Terrain.

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 parts that hinder access for example), how to clean the EGR valve of your GMC Terrain? 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 do the job more cleanly and will be able, if necessary, 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 GMC Terrain

Finally, 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 GMC Terrain, they simply choose to block it in the closed position. This treatment will have the outcome of greatly increasing the pollution emitted by the automobile, of no longer complying with pollution criteria, of having an engine warning light all day on and finally risk fouling the engine. We strongly recommend 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.

If you want more guides on the GMC Terrain, go to our GMC Terrain category.