You and your EGR valve ...

[jean63]

It is like for the FAP, it depends on the engines, which pass or do not pass the pollution standards.
Most diesel engines did not pass Euro I (1993) standards which limited PM and NOx without doing anything, so they were "gated" ... But probably some others didn't need them ...
For Euro V planned for 2009, some engines will pass the PM emissions without filter (0.005 g / km), the others will be "smoked".

The "97 vintage" corresponds to the arrival of Euro II.

....... with the method indicated in the subject "Pollution standards: the big cheat?" ???

[Woodcutter]

It's good, you're advancing the subject, well done.

[billie]

After a little internet research, the EGR valve would only have been installed on the ZX from the 1997 vintage.?

To find you there, here are photos of mine (ZX 1.9D temptation 97) equipped with this smoky shit!
http://gpenelon.online.fr/zx/echangeur1b.jpg
http://gpenelon.online.fr/zx/echangeur2b.jpg
http://gpenelon.online.fr/zx/echangeur3b.jpg
http://gpenelon.online.fr/zx/echangeur4b.jpg
Here, dismantled admission:
http://gpenelon.online.fr/zx/sanspipe.JPEG

Completely ignoring this problem, I had to have it revised by a dieselist, it caused jolts in the engine speed:
Diagnosis: dirty EGR valve with pump setting = € 200

I will no doubt hex him soon ...

[PITMIX]

Thank you for the photos.
I will be able to check if my father's 406 is equipped.
It is exactly the same mill but in TD. She is 96.

[bham]

After a little internet research, the EGR valve would only have been installed on the ZX from the 1997 vintage.?

To find you there, here are photos of mine (ZX 1.9D temptation 97) equipped with this smoky shit!: Evil:

Thank you Billie for these explanatory photos. On the turboD, it is less easy to see because of the air / air exchanger which is on the rocker cover but at least we know where to look.

[jean63]

After a little internet research, the EGR valve would only have been installed on the ZX from the 1997 vintage.?

To find you there, here are photos of mine (ZX 1.9D temptation 97) equipped with this smoky shit!
http://gpenelon.online.fr/zx/echangeur1b.jpg
http://gpenelon.online.fr/zx/echangeur2b.jpg
http://gpenelon.online.fr/zx/echangeur3b.jpg
http://gpenelon.online.fr/zx/echangeur4b.jpg
Here, dismantled admission:
http://gpenelon.online.fr/zx/sanspipe.JPEG

Completely ignoring this problem, I had to have it revised by a dieselist, it caused jolts in the engine speed:
Diagnosis: dirty EGR valve with pump setting = € 200

Thank you for the information.

Can we find other motors on this site to see if the EGR valve is easily accessible?

1 - Citroen Jumpy 1,9D 2002
2 - VW Transporter Tdi 110 hp from 2000? I need to find out.

[Woodcutter]

[...]
Can we find other motors on this site to see if the EGR valve is easily accessible?

1 - Citroen Jumpy 1,9D 2002
2 - VW Transporter Tdi 110 hp from 2000? I need to find out.

The Jumpy's engine is the same as the BX's, so it shouldn't be too difficult.

[Woodcutter]

Perhaps a start of information on the real reasons for the problems of EGR valves ...

On a document emanating from EDUCAUTO.org and concerning the limitation of NOx emissions (recalled by Boulon on another post), it is mentioned that the durability of the emission values ​​to be respected was 80 km for Euro 000 ( 3) and 2001 km for the Euro 100 (000) ... ¨
Maybe it was even less for Euro 1 and 2?
Knowing that manufacturers rarely make technical improvements (which cost them dearly) if we do not impose them, by regulatory means or according to market laws, we can therefore think that these EGR valves were designed to work ... just the mileage required!

[PITMIX]

Hello
The manufacturers do not make improvements which are expensive for them however the EGR valve is used to reduce NOx. However, the devices used to control the NOx rate have not been perfected.
So much so that condemned the EGR valve to prevent the car from breaking down, will not pose any problem during the passage to technical control. It is therefore an evolution of the engine which is useless from the regulatory point of view.
Imagine that the speed limit on the highway is 130 km / h and that the cops cannot control our speed with their speed cameras.
Engines must be fitted at the factory to pass the standard, but once in traffic ...

NB: Opinion of a Renault mechanic.

[jean63]

On a document emanating from EDUCAUTO.org and concerning the limitation of NOx emissions (recalled by Boulon on another post), it is mentioned that the durability of the emission values ​​to be respected was 80 km for Euro 000 ( 3) and 2001 km for the Euro 100 (000) ...

¨
that means that beyond these mileages, even if the engine sends NOx> norm linked to its date of leaving the factory, it is not blocked at the control !!! ??

The manufacturers do not make improvements which are expensive for them however the EGR valve is used to reduce NOx. However, the devices used to control the NOx rate have not been perfected.
So much so that to condemn the EGR valve to avoid the car breaking down, will not pose any problem during the passage to technical control

... and I understand why the diesels whose EGR valve has been removed and plugged, pass without problem to the control !!

We will end up understanding everything about the various magoulles to accept even polluting vehicles.