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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5913
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Re: Re:


quote:

Exywarrior wrote:
Apparently a lot of the EGR issues are related to the high sulphur content of Aussie diesel - European diesel has even lower sulphur levels than ours.



If this is truely the case then I would expect Nissan Australia to be including a strip & clean of the EGR valve in every service to limit the potential for it to be worse. If we get the technology from overseas but not the consumables to support it then the manufacturer should find ways to lessen the financial impact on the customer.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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Exywarrior Profile
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Date Registered: 10-2011
Location: Darwin, NT
TOTAL POSTS: 325
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Re: Re:


quote:

Revhead Kev wrote:

If this is truely the case then I would expect Nissan Australia to be including a strip & clean of the EGR valve in every service to limit the potential for it to be worse. If we get the technology from overseas but not the consumables to support it then the manufacturer should find ways to lessen the financial impact on the customer.



This is exactly what I have suggested to the Nissan dealer mate - I believe a planned maintenance routine needs to go into the maintenance schedule to pull out and clean the EGR valve every 20,000km. I haven't had much traction on this so once the dust settles on my defect rectification I'm going to write to Nissan and suggest this very thing.

Judging from what ToddyH03 has written on this thread regarding EGR valve maintenance it seems that cleaning it is not a particularly difficult evolution - putting it in the service manual would make things much better, I think.

In terms of our fuel quality, the sulphur levels were dropped significantly in 2009 after mandatory changes to standards in Australia, but our diesel is still crap compared to what they get in Europe (apparently).



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Mark T
2011 Series 4 T31 TL Auto - Twilight, factory towbar, factory mats, tinting, Cooper CS5s, cathodic protection, paint protection, yada yada...and no Provent
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nananut Profile
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Date Registered: 12-2011
Location: Kalgoorlie, WA
TOTAL POSTS: 366
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Re:


This morning the dealer in Esperance said the MIL light on my exy was EGR-related and probably a blockage occuring. The service guy said he had seen one other exy with the same problem. He cleared the code for my 400km back to Kal and I will be putting the car into service ASAP.

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scarey77 Profile
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Date Registered: 07-2009
Location: Central Queensland
TOTAL POSTS: 460
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Re:


What I'd be more interested in 'is why the EGR valve is blocking'.
Find the root cause and fix that part or reduce the chance of it happening is the better result than simply cleaning it often.

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popeclement Profile
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: Re:


The EGR blocking is symptomatic of all current diesel emission control design and not limited to Xtrails. There are several discussions on the net on the 'carbonising' of these components and associated in the intake system.

I think that regular cleaning from low k's is the best way to keep this issue in check.

John

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X-916, VW Golf 90TSi manual, limestone grey, no extras
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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5913
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Re: EGR Valve Cleaning & EGR Related MIL Error Code


Basically by its very intended action, it will always get carbon buildup, with only the amount being able to be varied.

The EGR valve recirculates exhaust gasses into the intake to lower the NOx emissions.
Diesel exhaust gasses contain soot (carbon).
When the hot exhaust gasses meet the cooler intake air the soot precipitates and deposits on the EGR valve and opening, over time building up to an extent which inhibts the proper operation of the valve.

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Kev X450(c) T30 Guru
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popeclement Profile
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: Re:


When I went in the week before to have the code diagnosed, the service manager mentioned there was another diesel with exactly the same code.

It would be interesting to contact Nissan's Technical Dept and get their feedback - nearly five years since the introduction of the diesel and I am guessing they would have built up a reasonable database of issues relating to the Aust vehicles from around the country.

---
X-916, VW Golf 90TSi manual, limestone grey, no extras
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cooch t31 Profile
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Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re:


Somebody should start thinking of a way of using a blanking plate to block the EGR then, I wouldn't hold my breath for Nissan to do anything about it service wise.

Many Patrol and Navara owners have been using a blanking plate to block the EGR tube before it gets to the EGR valve. Some even drill a small 2mm hole in the plate so it is not completely blocked.
Many owners have had these installed for nearly 10 years without any issues.

Pro's. No clogged EGR valve.
         Less black smoke from exhaust.
         Slight increase in power, (very slight)
         No more error codes.
         Cleaner oil.

Con's. Slightly higher exhaust temperature.
          

---
Tony X-891c

HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1

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Toddyh03 Profile
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Date Registered: 08-2011
Location: Lalor Park, NSW
TOTAL POSTS: 1663
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Re: EGR Valve Cleaning & EGR Related MIL Error Code


One extra con Tony:
      Extra NOX from the exhaust

Still worth considering though. I wonder if this ECU update will make a difference to the EGR issue. If it doesn't then a blanking plate will be worth more investigation I reckon. I would like to be able to monitor the exhaust temps after the mod though.

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Exywarrior Profile
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Date Registered: 10-2011
Location: Darwin, NT
TOTAL POSTS: 325
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Re: Re:


quote:

cooch t31 wrote:

Somebody should start thinking of a way of using a blanking plate to block the EGR then, I wouldn't hold my breath for Nissan to do anything about it service wise.
          



There are actually purpose-made EGR valve blocking plates for the Renault/Nissan M9R engine available on E-bay - they are very easy to search. They are made in the UK so there must be similar EGR issues there as well.

Unfortunately blocking the EGR valve is actually against the law as the car would no longer be compliant with anti-pollution laws. Not to mention it would completely void your Nissan warranty.

Apparently a side effect of blocking off or choking the EGR valve is that the MIL light comes on so it requires a change to the software to ignore the EGR valve alerts.

As Popeclement mentioned, the EGR valve problem is endemic to most Euro4 diesels. My dealer looks after VWs as well and he tells me that the diesel VWs suffer the same problem. This is an issue that needs resolution back at the design level but I wouldn't be holding my breath. In the meantime a routine for regular cleaning of the EGR valve seems a sensible option and it seems to me a no-brainer to have it inserted into the planned maintenance schedule.

Last edited by Exywarrior, 3/Apr/2013, 7:10 am


---
Mark T
2011 Series 4 T31 TL Auto - Twilight, factory towbar, factory mats, tinting, Cooper CS5s, cathodic protection, paint protection, yada yada...and no Provent
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