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Exhaust System: Car parts catalogue

Exhaust System: exhaust gas recirculation valve

How to detect a faulty EGR valve

Checking the exhaust gas recirculation system valve serviceability is too difficult: diagnostics of the exhaust system is not only time consuming, it also requires the use of professional equipment. Therefore, it is better to entrust the inspection to specialists at a service station.

In old cars, where no backpressure is created in the exhaust system, the inspection involves removing the valve. The vacuum of 250 mm Hg is applied with a vacuum pump connected to it. If the component is serviceable, its rod will be retracted opening the locking mechanism, and the vacuum will remain at the set level for not less than 30 seconds. Otherwise, the component is to be replaced.

In modern vehicles with backpressure in the catalyst, performing the diagnostics as described above is impractical. In such cases, during the check, follow the recommendations of the manufacturer of the vehicle.

You can notice that the EGR system valve needs diagnostics by the following symptoms:

  • at low revs and at idle speed, the engine operates unstably;
  • the onboard computer indicates an error;
  • fuel consumption increased;
  • reduced engine power.

The reasons of the EGR valve malfunction

The most common reason of EGR valve malfunction is the use of substandard fuel. The components contained in it enhance formation of soot deposits, which eventually results in jamming of the valve, and have a negative effect on metal components of the engine and related systems.

Fuel injectors fouling, deterioration of pump performance, and loss of tightness of the intake system impair the process of the air-fuel mixture preparation. Its leaning may result in an increased exhaust gas temperature, which leads to burning-out of the valve. This fault may also be caused by malfunctions of the ignition, timing or injection systems, when the fuel burns in the exhaust tract.

A common fault of the EGR valve is rupture of the membrane. It may occur due to accumulation of fouling on the surface of the diaphragm, poor quality of the component, or incorrect maintenance of the valve, such as using aggressive detergents for cleaning it.

Repairing and replacing the EGR valve

Repairing of the component is limited to cleaning. To remove dirt and soot deposits, first tap the body of the valve with a soft faced hammer, then shake out or blow out the crumbled deposits from the inside. The outlet hole can be carefully cleaned with a small screwdriver. Remember to never flush the valve with solvents.

To replace a faulty valve, follow these steps:

  1. Dismantle the plenum chamber of the intake pipeline.
  2. Disconnect the vacuum hose from the valve.
  3. Unscrew the bolts that fasten the component to the elements of the intake system.
  4. Remove the valve and replace it with a new one.
  5. Install all components in the reverse order.
EGR Valve: High quality car parts
WAHLER 7353D Exhaust gas recirculation valve cost £ 224,67 Parts Details
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Condition: New
In stock
Details
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EGR Valve Electric, with seal (WAHLER, 7353D)
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WAHLER 7625D Exhaust gas recirculation valve cost £ 245,17 Parts Details
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Condition: New
In stock
Details
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WAHLER 7625D - Buy Exhaust gas recirculation valve cheap price £ 245,17 online
EGR Valve Electric, with seal (WAHLER, 7625D)
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PIERBURG 7.02209.11.0 Exhaust gas recirculation valve cost £ 150,67 Parts Details
  • Valve type: Control Valve
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Technical Information Number: SI 0100
  • Condition: New
In stock
Details
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PIERBURG 7.02209.11.0 - Buy Egr module cheap price £ 150,67 online
EGR Valve Electric, Control Valve, with seal (PIERBURG, 7.02209.11.0)
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PIERBURG 7.03784.34.0 Exhaust gas recirculation valve cost £ 122,84 Parts Details
  • Valve type: Control Valve
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Technical Information Number: SI 0100
  • Condition: New
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PIERBURG 7.03784.34.0 - Buy Valve egr exhaust control cheap price £ 122,84 online
EGR Valve Electric, Control Valve, with seal (PIERBURG, 7.03784.34.0)
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DELPHI EG10003-12B1 Exhaust gas recirculation valve cost £ 68,94 Parts Details
  • Supplementary Article/Supplementary Info: with gaskets/seals
  • Number of used contacts: 5
  • Voltage [V]: 12
  • Equipment Variant: Linear
  • Condition: New
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PIERBURG 7.22818.57.0 Exhaust gas recirculation valve cost £ 100,27 Parts Details
  • Valve type: Solenoid Valve
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Voltage [V]: 12
  • Technical Information Number: SI 0100
  • Condition: New
In stock
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VEMO V10-63-0083 Exhaust gas recirculation valve cost £ 225,37 Parts Details
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with gaskets/seals, with EGR cooler
  • Number of Poles: 5
  • Cooling Type: Water-cooled
  • Connector Shape: Oval
  • New Part
  • See accessories list for additionally required parts
  • Recommended additional repairs: Mounting Kit
  • Part number of recommended accessories: V10-63-9083
  • Weight [kg]: 3,2
  • Packaging width [cm]: 45
  • Packaging height [cm]: 18,7
  • Supplementary Info: EXPERT KITS +
  • New part without deposit
  • Condition: New
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WAHLER 710476D Exhaust gas recirculation valve cost £ 258,64 Parts Details
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
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VDO 408-265-001-014Z Exhaust gas recirculation valve cost £ 179,00 Parts Details
  • Supplementary Article/Info 2: Control Unit/Software must be trained/updated
  • Operating Mode: Electronic
  • Supplementary Article/Supplementary Info: with gaskets/seals, without gasket / seal
  • Part number of recommended accessories: 7701208628
  • Observe the vehicle manufacturer specifications
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  • Condition: New
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VALEO 700412 Exhaust gas recirculation valve cost £ 167,80 Number of Poles: 5-pin connector Parts Details
  • Supplementary Article/Info 2: without clamp
  • Operating Mode: Electric
  • Number of Poles: 5
  • Supplementary Article/Supplementary Info: with gaskets/seals
  • Product line: ORIGINAL PART
  • Exhaust Emission Norm: Euro 4 (D4)
  • Assy./disassy. by qualified personnel required!
  • Weight [kg]: 1,06
  • Condition: New
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PIERBURG 7.28248.17.0 Exhaust gas recirculation valve cost £ 87,14 Parts Details
  • Valve type: Solenoid Valve
  • Operating Mode: Electric
  • Supplementary Article/Supplementary Info: with seal
  • Voltage [V]: 12
  • Technical Information Number: SI 1830
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