RRS 3.0 blowing smoke (lots of it)

Quote:

---

Originally Posted by discotwinturbo

Hi Dougal,

Dpf....not that I am aware of...nothing in the manual either about a dpf. It has urea (this is what the vw technicians call it.....not sure if this is the same as add blue) that is injected into the exhaust. A little container is inside the spare tyre section, that is topped up at each service. Did have a light come on for this on one occasion in the last 100,000 k's.

It has a nice smell to the exhaust, where as the D4 smells like a diesel.

Brett.....

---

I suspect it would have a DPF, most VAG diesels in the last four or so years do. If you have a clean inside exhaust then the DPF is the reason why.

Quote:

---

Originally Posted by Dougal

I suspect it would have a DPF, most VAG diesels in the last four or so years do. If you have a clean inside exhaust then the DPF is the reason why.

---

Was just googling it.....apparently dpf was from 2006 on the V6 diesel and adblue from 2007.

Adblue may be the reason for the nice smell.

Brett...

Quote:

---

Originally Posted by Disco4SE

Greg, I am assuming that the remap was done by a reputable agent / mechanic?
I only know of one place in the UK and one in OZ that I would trust.

Re: The black smoke. They all blow some sort of smoke under heavy acceleration...........nature of a diesel.
I have noticed recently that the Mercedes ML diesels blow heaps of smoke, even under normal acceleration.

Cheers, Craig

---

Yes Craig, it was done by Superchips UK, via their local agent. And I'm blowing blue smoke, not black.

Quote:

---

Originally Posted by FarmerBuzz

Our 3td discovery 4 has had it fixed geometry turbo replaced after extensive
testing. It is the fourth that the Dealer has replaced and seems to be more of a problem with the earlier discovery 4s.
regards Buzz

---

Yep, sounds about right, mine is a March 2010 build, same engine as the D4.

Quote:

---

Originally Posted by discotwinturbo

Was just googling it.....apparently dpf was from 2006 on the V6 diesel and adblue from 2007.

Adblue may be the reason for the nice smell.

Brett...

---

Adblue is an alternative to EGR for reducing NOx.

Our d4 does not blow smoke now the turbo has been replaced. The symptoms we had though were, cruse along for some time with rpm below 2000 then accelerate hard and a large amount of pale blue smoke would be produced.
If you repeated this a few times you would get no smoke as the oil build up would be dissipated. They was also a slight oil consumption rise while we had this problem. Also there is no add blue used in the exhaust system in these vehicles.

Quote:

---

Originally Posted by FarmerBuzz

Also there is no add blue used in the exhaust system in these vehicles.

---

Correct, the LR engines use EGR instead of Ad-blue. The Ad-blue was a side-track about VW V6 diesels.

Quote:

---

Originally Posted by FarmerBuzz

Our d4 does not blow smoke now the turbo has been replaced. The symptoms we had though were, cruse along for some time with rpm below 2000 then accelerate hard and a large amount of pale blue smoke would be produced.
If you repeated this a few times you would get no smoke as the oil build up would be dissipated. They was also a slight oil consumption rise while we had this problem. Also there is no add blue used in the exhaust system in these vehicles.

---

Yep, that's exactly the symptoms for my car. Even after the turbo replacement. So where is the oil accumulating before it's burnt off?

Quote:

---

Originally Posted by FarmerBuzz

Our d4 does not blow smoke now the turbo has been replaced. The symptoms we had though were, cruse along for some time with rpm below 2000 then accelerate hard and a large amount of pale blue smoke would be produced.
If you repeated this a few times you would get no smoke as the oil build up would be dissipated. They was also a slight oil consumption rise while we had this problem. Also there is no add blue used in the exhaust system in these vehicles.

---

So FarmerBuzz, had you had any remapping or chipping done prior to the turbo issue?

My D4 had the same habit as FarmerBuzz except that there was no discernable oil usage due to the low number of incidents. No remapping of mine, just an early build. As the turbo was replaced only last week, I haven't detected if the problem has been cured. However it has never burnt oil at higher revs, only accumulating oil over hours of driving using only the primary turbo.

Greg,
Only a guess but I suspect your primary turbo has a problem at high revs and that the secondary turbo was replaced because generally they have been the culprit.