What are the symptoms of a damaged EGR valve and how to clean it?

The EGR valve is a key element of the car’s exhaust system. Its main task is to reduce the emission of harmful substances into the atmosphere by redirecting part of the exhaust gases back to the intake system. In this article, we will discuss the most common symptoms of a damaged EGR valve and methods of diagnosing and cleaning this element.



EGR valve – what damage does it suffer from?



The EGR valve may suffer various damages that affect its proper operation. One of the common problems is contamination of the valve, which may lead to its blockage or restriction of gas flow. Other potential damages are leaks, corrosion, damage to the diaphragm or solenoid valve. Each of these damages can lead to different symptoms that need to be diagnosed and repaired.



Symptoms of a damaged EGR valve



Damage to the EGR valve causes symptoms that every vehicle user will notice immediately. They are mainly related to incorrect engine operation and increased combustion levels. This not only makes using the vehicle less comfortable and safe, but also worsens driving economy.

How to recognize EGR valve faults? Below we describe the most common symptoms of failure of this element of the exhaust system.


– Decrease in engine power and efficiency

A damaged EGR valve can lead to a decrease in engine power and efficiency. Exhaust gases that should be reintroduced into the intake system may not be properly redirected, leading to disturbances in the fuel combustion process.


– Increased fuel consumption

Another symptom of a damaged EGR valve may be increased fuel consumption. Exhaust gases that are not recirculated properly can affect the air-fuel mixture, leading to inefficient combustion and increased fuel consumption.


– Increased exhaust emissions

A damaged EGR valve can also lead to increased emissions of harmful substances such as nitrogen oxides (NOx). Improper valve operation may result in exhaust gases not being properly redirected into the intake system, leading to increased exhaust emissions.


– Boot problem

Damage to the EGR valve may also result in engine starting problems. A malfunctioning valve can affect the mixing of fuel and air during starting, which may result in difficulty starting the vehicle.


How to diagnose an EGR symptom fault?

Vehicle owners or users should be particularly alert to the above-mentioned symptoms. They may indicate damage to the EGR valve, but they are not specific to this fault. They may well indicate damage to other components of the exhaust system.

Therefore, the diagnosis of a damaged EGR valve requires the help of a specialist and connecting the car to a diagnostic station. Correct diagnosis is very important for taking appropriate corrective actions, and is also important in the context of savings, because it allows us to avoid repairs of properly functioning elements.

How to clean the EGR valve?

Cleaning the EGR valve is one of the most common ways to repair its damage. There are several cleaning methods, including mechanical removal of contaminants, the use of specialized chemicals or the use of ultrasonic devices. Cleaning the EGR valve allows you to restore its full functional properties and thus ensure proper engine operation.

Is a regenerated EGR valve a good idea?

EGR valve regeneration can be a beneficial and economical option for vehicle owners, especially older ones. Regeneration allows you to repair an existing valve by replacing damaged parts and cleaning it from contamination. This is clearly a cheaper option than purchasing a new EGR valve, which makes regeneration an attractive solution for people looking for savings. This is particularly important for vehicle fleet owners.

If damage to the EGR valve is suspected, it is important to take corrective action quickly. This is important in the context of avoiding more serious engine problems and maintaining its efficiency and driving economy.

In case of EGR valve faults, you can use the Arcoore offer. We offer both new and remanufactured EGR valves for trucks of many brands, including: DAF, MAN, Scania, Mercedes-Benz, Volvo, Solaris and Renault.

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