I posted a while ago about info about EGR cleaning on Octavia 3. There is plenty of info on YouTube about early diesels and I have changed the EGR on my Fabia and cleaned it since. 

 

No one responded, but since I have come across these images of an O3 EGR for sale. Unlike the earlier diesels it looks impossible to clean out. Look at the mesh pattern in the chrome metal, allowing air flow through, but no possibility of cleaning tools. 

 

On Peugeot models I come across metsl-plastic joins that when separated the EGR breaks and replacement is the only option.

 

I'm admittedly a bit paranoid about keeping on top of this, if the EGR starts to gunk up and work improperly the DPF will take all the smoke that will lessen its lifespan.

 

Here is a few images of the EGR. Anyone care to correct me on manufacturers opting for replacement rather than ability to clean?

Last image I think is the anti shutter valve (small disc)

 

Unlike the Fabia mk1 which has no electronics I think the O3 has a wiring loom to it, possibly flagging engine check light if blocked? Or is that power if it is not vacuum operated?

 

There is a sliding scale on efficiency before blockage occurs, hence wanting to clean.

 

Also, do new EGRs need programming so the car accepts new hardware? I'm aware that new power steering pump on Audi (2012) required OBD2 programming for ECU to accept it.

 

 

Cant help you re the cleaning but its my understanding that a non working EGR valve (not taking the smoke as you put it) will extend the life of the DPF, or more correctly not reduce its life as is the case with all the VAG vehicles that have had the emissions fix where the EGR works overtime.

 

If I am incorrect then I should not have fitted an EGR emulator/simulator.

My car is 2016 reg so avoided the emissions fix. But you are correct the earlier diesels (Octavia 2?) then went onto develop problems post emissions fix.

 

There is a plethora of mk 1 and 2 models on YouTube where EGR is being cleaned but nothing on Octavia 3. 

 

Are the EGRs on new diesels just as likely to block up as earlier diesels, that is by 50 k miles?

 

Images posted look like it is a throw away part and replace?

I'm pretty sure yours will an EA288 engine, where the EGR concept is completely different to the previous engines.

 

EGR gas is taken after the DPF, so it will have virtually no particulates in it, which is what clogs up the EGR valve on previous engines.

On 14/04/2021 at 12:53, PipH said:

 

EGR gas is taken after the DPF, so it will have virtually no particulates in it,

That is useful, thanks.

Looking at the engine, I didn't clearly see an EGR between the airbox / MAF sensor and DPF at rear top of engine bay.

This is the DPF? Photo taken from front of car looking to rear of engine.

 

I only assumed EGR might cause premature DPF issues given its mention as a cause on several websites, probably other manufacturers, along with faulty sensors measuring differential in exhaust pressure across DPF or other issues.

 

Looks like this EGR is found on a range of engines including 2l 110kw tdi

 

Out of interest, how long would I get out of the EGR? 

 

 

As there should be virtually no particulates going through the EGR any more, I don't see why it wouldn't last the life of the engine.

 

It does still have a moving flap, which no doubt will have plastic gears, so that might be the only thing that could wear out.

 

You might be interested in this self study guide to the EA288 engine series below.

ssp514 1_3_2014.indd (tdiclub.com)