You’ve likely already been aware of the well-known EGR valve, the anti-pollution valve. It is not generally appreciated by motorists because it is likely to develop more concerns than anything else… Actually, according to the use you are going to make of your car, it can become congested and bring about you a lot of concerns. If this is the situation, you are likely wanting to know how to clean the EGR valve of your Volvo S90 ? Don’t stress, we’ve prepared this article to help you with this operation. To accomplish this, we will initially check out the goal of the EGR valve, then what are the failures that the EGR valve of your Volvo S90 can reason and to finish the part that will likely appeal you the most, how to clean the EGR valve Volvo S90?

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How to Clean your Volvo S90 EGR Valve: Role and Operation

Role of the EGR valve

The EGR valve of your car has been added to diesel engines primarily to reduce pollution emitted by cars and to meet EURO requirements on Volvo S90 . It will as a result influence the quality of exhaust gas output and reduce toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we learn how to clean the EGR valve on your Volvo S90 , we will examine how it functions. As described before, its mission is to clean the exhaust gases, 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 reduce all unburned toxic particles. It will function principally at low speed because at high speed the combustion is sufficient to burn all these gases.

How to clean your Volvo S90 EGR valve: Identifying faults

The EGR valve, although very useful to limit the pollution emissions of your Volvo S90 , will regrettably tend to clog up because of soot/gas deposits that will build up in its mechanism, which will eventually risk obstructing the operation of the valve, until entirely blocking the engine motor, here are the signs of illness that a defective EGR valve on your Volvo S90 can cause:

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

How to clean your Volvo S90 EGR valve: In practice

And now we’ll commence the part you are most intrigued by, 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 Volvo S90 EGR valve system: Without taking it apart

Although this approach is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, the reality is, 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 Volvo S90.

How to clean your car EGR valve: With disassembly

Here is the most beneficial approach, which will require sufficient access to the EGR valve to conduct the process on your own. 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 finished, 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 conduits 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 Volvo S90.

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 difficulties (removing too many elements that hinder access for example), how to clean the EGR valve of your Volvo S90? In such a case, it would be better rather than launching yourself into an overly complex operation, 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 Volvo S90

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 Volvo S90, they simply choose to block it in the closed position. This treatment will have the effect of greatly increasing the pollution emitted by the car, of no longer complying with pollution criteria, of having an engine warning light all day on and ultimately risk fouling the engine. We highly 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.

If you need more tutorials on the Volvo S90, go to our Volvo S90 category.