You’ve likely already heard of the popular EGR valve, the anti-pollution valve. It is not always appreciated by drivers because it is likely to develop more concerns than anything else… Indeed, dependant upon the use you are going to make of your automobile, it can become clogged and bring about you a lot of problems. If this is the situation, you are likely concerned about how to clean the EGR valve of your Scion tC ? Don’t stress, we’ve written this article content to help you with this task. To do this, we will initially take a look at the purpose of the EGR valve, then what are the failures that the EGR valve of your Scion tC can provoke and finally the part that will likely concern you the most, how to clean the EGR valve Scion tC?

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How to Clean your Scion tC EGR Valve: Role and Operation

Role of the EGR valve

The EGR valve of your car has been added to diesel engines mainly to reduce pollution emitted by automobiles and to fulfill EURO measures on Scion tC . It will consequently control the quality of exhaust gas output and eradicate toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we learn how to clean the EGR valve on your Scion tC , we will have a look at how it works. As described before, its mission is to clean the exhaust fumes, 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 eradicate all unburned toxic particles. It will work mostly at low speed because at high speed the combustion is sufficient to burn all these gases.

How to clean your Scion tC EGR valve: Identifying faults

The EGR valve, despite the fact very effective to limit the pollution emissions of your Scion tC , will regrettably tend to clog up because of soot/gas deposits that will accumulate in its mechanism, which will ultimately risk blocking the operation of the valve, until entirely blocking the engine unit, here are the signs of illness that a faulty EGR valve on your Scion tC can cause:

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

How to clean your Scion tC EGR valve: In practice

And now we’ll commence the part you are most interested in, how to clean the EGR valve of your car. Here are the two approaches that you can use.

Do it yourself

How to clean your Scion tC EGR valve system: Without taking it apart

Despite the fact this procedure 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, equivalent 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 Scion tC.

How to clean your car EGR valve: With disassembly

Here is the most effective procedure, which will require sufficient access to the EGR valve to perform 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 achieved, now comes the time for cleaning. To make this happen, 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 Scion tC.

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 elements that hinder access for example), how to clean the EGR valve of your Scion tC? 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 dependant upon the difficulty of access is between 70 and 300 €.

Remove the EGR valve of your Scion tC

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 Scion tC, they just choose to block it in the closed position. This modification will have the effect 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 ultimately risk fouling the engine. We highly 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 have any additional questions about the Scion tC, do not hesitate to consult our Scion tC category.