Nissan EGR valve replacement, made easy

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Our expert insights into EGR valve replacement

What does an EGR Valve motor do?

The valve controlling your EGR (exhaust gas recirculation) controls the amount of nitrogen oxide emitted into the atmosphere by engines by recycling part of the exhaust gas back into the engine cylinders.

What are the symptoms of a malfunctioning EGR Valve motor?

A rough idle when starting your vehicle or during brief stops (i.e. low engine speeds with a warmed-up engine) can be caused when the EGR is constantly open and a continuous flow of exhaust gases goes into the intake manifold. Poor performance can be caused when the valve is open or closed. The incorrect function of the EGR valve can cause the erratic performance of your vehicle.

What happens when we do an EGR Valve Replacement replacement on your car?

There are as many different processes to change an ERG Valve.

  • The mechanic will physically inspect the area around the EGR valve for leaks

  • A full diagnostic test will be carried out with monitoring of live data

  • If deemed to be faulty and once the engine has cooled, the EGR valve will be removed and replaced

  • Diagnostic checks will be run and codes cleared down

  • The vehicle will be tested

Daniel, from LondonDaniel, from London

Hey Fixter, how common is an EGR valve replacement?

With exhaust gases flowing through the component, it will eventually succumb to the deposits of carbon and hydrocarbons and it will ultimately seize. Replacing an EGR valve is an all too common repair.

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Want to learn more about Nissan EGR valve replacement?

What does a EGR Valve do?

The valve controlling your EGR (exhaust gas recirculation) is an important part of your car's engine. It controls the amount of nitrogen oxide emitted into the atmosphere by petrol and diesel engines by recycling part of the exhaust gas back into the engine cylinders.

Nissan

The Nissan Motor Co., Ltd. is a Japanese multinational automobile manufacturer, established over 85 years ago, in 1933.

Currently, they operate as part of the Renault–Nissan–Mitsubishi Alliance, incorporating two other industry giants under their umbrella operation.

Nissan has always been a popular household name, and recently a bestseller to boot, with around 1.7million vehicles on the UK roads today.

Their introduction to the SUV market happened in 2007 with the Qashqai, and in 2018 it was announced as the 4th best-selling car in the UK.

Stylish well-priced cars for the road, off-road and the track

Nissan’s various sized and styled SUVs are well priced with something for both urban and adventure seeking drivers. The British built Nissan Qashqai has made great waves since its introduction and its smaller compact crossover cousin, the Nissan Juke, isn’t going to be too far behind for long.

Nissan’s latest electric models

The Nissan Leaf is an all-electric compact hatchback that is leading the way in this fast-growing and competitive market. It became the world’s best selling electric car in 2014, holding 45% of the all-electric car market.

Nissan’s second zero emissions vehicle is the E-NV200 Combi, a 5- or 7-seater MPV utilising the same technologies as the ground- and record-breaking Leaf.

The Nissan GT-R: true track performance

With increased torque and horsepower, the latest GT-R delivers up to 3.8-litres of twin-turbo V6 performance, an incredibly clean drag coefficient providing more consistent downforce, and utilising Nissan’s Vehicle Dynamic Control to consistently monitor steering and braking, this Nissan technology automatically makes compensations to oversteer, understeer, engine speed and braking to provide maximum performance with minimum effort.

And if you can’t quite stretch to the £80k+ price tag for your performance sports car, then the Nissan 370Z could be a more affordable option starting at the lower base price of £29k.

How common is an EGR valve replacement?

With exhaust gases flowing through the component, it will eventually succumb to the deposits of carbon and hydrocarbons and it will ultimately seize. Replacing an EGR valve is an all too common repair.

How does an EGR valve work and what are the components?

The EGR valve is connected to the exhaust system by a metal tube. When the engine is running, the valve will be opened by the engine management system to allow the exhaust gases to travel up the tube from the exhaust system and back through into the inlet manifold, and afterwards back into the engine. The control of this valve is either driven directly by a solenoid on the EGR unit itself or via a hose to a solenoid on the vacuum circuit that is also opened by the engine management system. Some EGR units have a cooler as part of them, that is plumbed into the engine’s cooling system, literally to cool the exhaust gasses before they go back through. By the exhaust gasses going back into the engine, it reduces NOx (Nitrogen Oxide) content. This is because the exhaust gas reduces the actual oxygen proportion and increases the vapour content, which in return reduces the combustion temperature peak. As more NOx is produced as the temperature rises, this method actively reduces the amount created.

What are the symptoms of a malfunctioning EGR Valve motor?

A rough idle when starting your vehicle or during brief stops (i.e. low engine speeds with a warmed-up engine) can be caused when the EGR is constantly open and a continuous flow of exhaust gases goes into the intake manifold. Poor performance can be caused when the valve is open or closed. The incorrect function of the EGR valve can cause the erratic performance of your vehicle.

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