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How to Clean the EGR Valve

Model: (Various brands) Various
Part: Valve

Video tutorial

In this guide, learn how to clean the EGR valve using a specific product. When your diesel vehicle emits excessive fumes and the engine does not run smoothly, a common cause may be a dirty EGR valve clogged with carbon deposits.

The EGR system is designed to recirculate some exhaust gases into the intake to reduce nitrogen oxide formation, but certain conditions can cause deposits and malfunctions in the components. The Tunap product is called 926 X-foam, and it can be easily found on Amazon, for example, with the code B01L72A5L8, priced at £38.99, including delivery charges.

Once the EGR valve is removed, the foam adheres perfectly to the component and can dissolve the most stubborn dirt completely after a dwell time of about 15 minutes. Simply refit the valve in its place.

You can also treat the intake manifold using a special applicator.


Updated on 25 September 2026 by ScegliAuto


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