Intimate service: Lanzhou Meidong ES300h Executive Edition replacement egr valve!

  8
 September 4, 2024
At the beginning of 22, Toyota Motor (China) Investment Co., Ltd. recalled some imported Lexus UX and ES vehicles, including:

A total of 609 imported Lexus UX 200s were manufactured during the period from December 24, 2018 to May 18, 2020.
Some imported Lexus UX 260h vehicles produced during the period from December 24, 2018 to April 24, 2020, totaling 12364.
Some imported Lexus ES 300h vehicles produced during the period from February 13, 2018 to April 24, 2020, with a total of 60751 vehicles.
Some of the imported Lexus ES 200s produced during the period from July 29, 2019 to April 17, 2020, totaling 39636.
A total of 14136 Lexus ES 260s were manufactured during the period from June 25, 2018 to April 28, 2020.
The vehicles within the scope of this recall may not operate smoothly because the internal components of the engine exhaust gas recirculation valve (“EGR valve”) may be corroded by a higher concentration of chlorine in the fuel. It may cause the engine to run badly, and in extreme cases, the vehicle may stall at low speed, increasing the risk of collision accidents and potential safety risks. Toyota Motor (China) Investment Co., Ltd. will replace the improved EGR valve assembly for vehicles within the scope of the recall free of charge to eliminate safety risks.

Let’s first popularize the EGR valve:
The EGR valve is one of the important parts of the exhaust gas recirculation system, which will send part of the exhaust gas from the engine back to the intake manifold and enter the cylinder again to participate in combustion together with the fresh mixture. Because the exhaust gas contains a lot of polyatomic gases such as carbon dioxide, although carbon dioxide and other gases cannot be burned, they can reduce the maximum combustion temperature of the mixture in the cylinder because of its high specific heat capacity and can absorb a large amount of heat in the combustion chamber. in order to achieve the purpose of reducing the formation of nitrogen oxides and energy saving and emission reduction.

As for the function of EGR valve, it is to control the amount of waste gas entering the intake manifold and make a certain amount of waste gas flow into the intake manifold for recirculation. And its principle is also relatively simple, popularly speaking, it is equivalent to a faucet, but the extent of opening or closing is controlled by the engine ECU computer, when the valve is opened, the exhaust gas enters the combustion chamber, when the valve is closed, the exhaust gas does not enter the combustion chamber and is discharged through the exhaust pipe. As the working process of the EGR valve is electronically controlled by ECU, it can accurately control the amount of waste gas entering the cylinder, thus reducing excessive exhaust gas into the engine and affecting the normal operation. In addition, the EGR valve generally starts to work at medium and high speed, and basically does not participate in the work at low speed or idle speed.

Failure phenomenon after EGR valve damage:

The damage of EGR valve can be divided into two categories, which are normally open and normally closed.

If the EGR is in the normally open position, the vehicle will have faults such as unstable idle speed, even flameout, increased fuel consumption, lack of power, etc., while if the EGR is in the normally closed position, the vehicle will have excessive emissions, higher exhaust temperature, shortened water temperature rise period and other fault phenomena. Whether the EGR valve is normally closed or open, the driving instrument will light the engine fault light for early warning, and the associated fault code will be stored in the engine control unit.

Contact Lanzhou Meidong after-sales service staff in advance to confirm that there are goods in the 300h accessories store, and then went to Meidong last Friday afternoon to replace the EGR valve.

At 2 p.m., drive to Lanzhou Meidong after-sales service workshop to replace the egr valve.

Workers began to disassemble the old EGR valve.

Removed EGR valve.

This is the new EGR valve.

New and old EGR valves.

EGR valve box, there are instructions, did not look carefully at that time, now look at the above suitable model is es260, ux260h, I do not know 300h is also this, should be no problem!

Disassemble and assemble new and old EGR valves.

The assembly is complete.

And connect the tubing.

Arrange the tubing at the EGR valve position.

This is the position of the EGR valve.

Start installing the assembled EGR valve.

Operate carefully and install carefully!

Installed EGR valve.

After the installation, the master carefully cleaned the engine room to clean up the dust and oil stains.

After cleaning, the engine room has taken on a new look.

Start the car and carefully check the position of the EGR valve for oil leakage and other problems.

Finally, the engine guard plate is installed, and the EGR valve disassembly and replacement work is finished perfectly.

The master also added antifreeze glass to the car.

Perfect call it a day!
After replacing the EGR valve, the staff drove the car to the car wash and then went to the nearby gas station to fill up the car’s fuel tank free of charge. Half a day of recall work, Lanzhou Meidong after-sales staff, enthusiastic service, meticulous operation, let customers take advantage of the fun, satisfied and return, like the after-sales staff of Lanzhou Meidong!