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How to clean EGR valve?

Can you free an EGR valve?

In principle, you cannot free the EGR valve.

However, you can protect it from heavy soot formation by adopting a sportier driving style. If it is already too late and your EGR valve is completely coked up, only cleaning or replacing the component will help.

When do you have to clean the EGR valve?

Cleaning the EGR valve is accessible to everyone! When functioning poorly, the carbon builds up over time and eventually blocks the EGR valve. Then the performance of your engine drops, black smoke and fuel consumption increase!

How do I know if the EGR valve is defective?

If the valve is defective, various symptoms appear:
  • Idle speed fluctuates.
  • Black smoke comes out of the exhaust.
  • The vehicle cannot accelerate as quickly.
  • The engine often does not start properly.
  • Check engine light comes on.
  • Entry in the error memory «EGR valve permanently open»

What do EGR cleaners do?

MATHY-AGR is a highly effective exhaust gas recirculation valve cleaner (EGR valve) for diesel vehicles. Regular use of the diesel additive MATHY-AGR in diesel fuel reduces the build-up of carbonaceous residues in the exhaust gas recirculation system, thus minimizing repair costs.

Clean the EGR valve instead of replacing it | The car doctors

27 related questions found

Can you clean the EGR valve with brake cleaner?

So the best thing is to remove the EGR valve (as already mentioned :D) and then soak it in brake cleaner overnight so that all the carbon deposits come off. However, this method does not last long, as it quickly clogs up again (for whatever reason).

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How long does an EGR valve last?

EGR valve life is typically around 100.000 miles. However, you can significantly extend the life of the car by properly maintaining the car. By cleaning the EGR valve yourself, you can prevent and often even solve such problems.

What can happen if the EGR valve is defective?

Typical problems or defects in the EGR valve relate to cables, seals, hoses/pipes and the inner workings of the valve. As a result, the valve no longer opens and closes properly and the correct amount of exhaust gas is not mixed into the combustion process.

Why does an EGR valve break?

EGR valve defective: typical sources of error

Soot particles settle in the valve chamber. The valve then sticks due to the deposits on the valve and the exhaust gas recirculation is defective. Particularly high connection cross-sections are possible with the diesel engine, but this increases the risk of contamination.

How much does it cost to change an EGR valve?

The prices for repairing the EGR valves are usually reasonable. Depending on the vehicle type, the new component can cost from 100 euros. The total costs are between 150 and 900 euros.

How long does it take to change the EGR valve?

Normally, i.e. in the most common vehicle models, changing the EGR valve takes about one to three hours. The material costs for a new valve vary greatly from car to car and cost between 50 and 250 euros on average.

Where is the EGR valve located?

The EGR valve (exhaust gas recirculation valve) is part of the exhaust system in the car. Regardless of whether it is a BMW, Opel, Mercedes-Benz or VW, the valve for exhaust gas recirculation is installed in the immediate vicinity of the engine block, directly at the base of the exhaust manifold. The EGR valve is also often referred to as an EGR valve.

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Does a petrol engine also have an EGR valve?

Exhaust gas recirculation systems in petrol engines aim to minimize fuel consumption. The EGR valve enables the engine control unit to control when and to what extent exhaust gases are to be added to the fuel-oxygen mixture.

How often do you have to clean the EGR valve?

The exhaust hoses around the EGR valve should also be cleaned. Another advantage of cleaning when disassembled is that the cleaning agent has a longer effect and the process can be repeated as often as necessary until the last bit of dirt has been removed.

How to disable EGR valve?

Depending on the vehicle, the activation of the EGR is either deactivated manually or additionally via the software of the engine control unit. If the change is made, the valve is permanently closed and it can also be sealed with a cap adapted to the vehicle.

What does the error message EGR circuit mean?

What does trouble code P0403 mean? It indicates that the engine control unit has detected a fault in the engine’s exhaust gas recirculation (EGR).

Does a diesel have an EGR valve?

Exhaust gas recirculation (EGR) reduces pollutants in petrol and diesel engines. Exhaust gas is extracted behind the cylinders, routed through the EGR valve and mixed back into the intake air. As a result, less oxygen gets into the cylinders.

How much does an EGR valve cost at VW?

Changing the EGR valve: These costs are incurred with a VW

Depending on the brand and model, the price range for the replacement part ranges from 75 to 300 euros for a new EGR valve. For the common VW models such as the Golf, Passat, Sharan or Touran, you should expect parts to cost between 150 and 250 euros.

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How much does EGR valve deactivation cost?

Deactivate diesel particulate filter

The diesel particulate filter is often clogged and requires repeated cleaning or even replacement, which costs between €1.000 and €2.000 depending on the model. If there is a blockage, the indicator lamp lights up and the engine goes into emergency mode.

What controls the EGR valve?

The EGR valve has the task of metering the amount of recirculated exhaust gas. It is installed either on the exhaust manifold or on the intake tract. In some engines, it sits in a heat-resistant exhaust pipe that connects the exhaust manifold to the intake tract.

Where is the EGR valve on the t5?

The EGR valve is a unit with a water cooler and is installed between the engine block and bulkhead.

Who controls the EGR valve?

The EGR system in modern vehicles is controlled by electronics — the engine control unit is responsible for the controlled opening of the valve and uses the readings from many sensors, such as e.g. B. Air mass sensor, lambda probe and exhaust gas temperature sensors (AGTS).

When is the EGR activated?

The exhaust gases are drawn in by the engine via the clocked EGR valve. This changes the intake temperature at the NTC in the intake manifold. In this way, the control unit knows that the EGR system is in order. If there is no temperature jump, the control unit actuates the MIL error lamp.

Which engines have EGR?

What options are there to reduce emissions?

The most effective measure for reducing particulate matter emissions from vehicle exhaust is the use of soot particle filters. So-called diesel particle filters have been installed in diesel vehicles for a long time.

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