When this part fails, gets stuck, or becomes inoperative, the vehicle throws the ECU to code P1480 / 1485 EGRV Circuit Malfunction or EGR valve problem.
Renault's R9M engine has 2 EGR Valves.
The first of these. EGR-HP valve that can be clogged before the catalyst and needs to be cleaned periodically. The purpose of this valve is to make the amount of exhaust gases discharged from the cylinders in the range of 5 percent and 40 percent back into the cylinders by mixing with the fresh air through the intake manifold. The engine brain decides how much the exhaust gases will be used.
As the exhaust gases in the cylinders are reintroduced into the combustion process, harmful gases such as Nitric Oxide (NO) and Nitrogen Dioxide (NO2) are reburned. By reducing the temperature of these gases in the EGR valve, the combustion temperature in the cylinders decreases, the engine becomes healthier. In this way, the emission values of the exhaust gas decrease, the combustion of the exhaust gases increases the efficiency, the fuel consumption is positively affected as a result of the increase in the efficiency.
The second one is as follows
It has 1.6dci low pressure EGR.
Since diesel cars do not have a throttle, it does its job.
a) While the start stop system is active, it clogs the exhaust for a short time, allowing the engine to start in a shorter time with high back pressure.
b) If the vehicle engine is cold, it shuts down at short intervals and helps the engine to warm up.
c) The vehicle undertakes the function of automatic adjustment of the exhaust pressure when the compressor or engine brake is activated.
d) Another purpose of this is to heat the dpf by turning off when it is time to clean the filter by itself.
I could not find any more information in terms of the function of this piece. If you have any information, you can share it in the comments section.
Is EGR exhaust valve repaired?
Test whether the clapper spring will return by hand force when the vehicle is lifted with the lift up. It is beneficial to clean the rust remover outer spring if it is difficult to come back. However, if it is still difficult to come back, the main reason may be that the carbon wastes in the exhaust boiled into the metal since it made it difficult for the flap to open and close.
Do the mechanical opening and closing of the cupboard with your hand can be a bit stiff and difficult at first, but you can feel it loosen after turning it several times by hand. In other words, if you can break the institutions inside yourself, the broadcast becomes easier to come back.
If the flap does not move at all, there is a way to move it even if the success rate is low. It can be tried because the material is already defective. The hole will be drilled by adjusting the drill position from a location close to the clapper. Afterwards, it can be tried to clean by squeezing CRC (gasket remover) "seal paint varnish remover" into the hole.
If this is done, the cleaning vapor that comes in through the hole is very flammable. If its vapor returns to the EGR valve, it may damage the engine.
Since CRC seal remover is a very strong remover, it can break up the institutions there.
Then you can plug the drilled hole with a bolt or something else.
It is useful to clean with WD40 or equivalent rust remover to do this pedestrian maintenance. Afterwards, the part should be cleaned with lining cleaner to remove WD40 residue, then air dried and copper grease can be used. If there is no copper grease, you can use it in teflon spray. These greases can withstand exhaust temperature.
23 янв 2020
