V10 TDI smoke from engine bay - Club Touareg Forums
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post #1 of 23 Old 02-14-2017 Thread Starter
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V10 TDI smoke from engine bay

So I have had my V10 for a few months now. I'm guessing when the Particulate filter does its burn out I get some smoke coming out of the engine bay and consequently into the interior. Its just white smoke and I see it come out the exhaust first then a minute later I can smell it in the interior and then when I stop can see it coming out the hood. Pop the hood and its coming from the Rear Passenger side of the engine bay from down low somewhere.

I did a search and didn't come up with anyone else's V10 doing this. I am not sure where the particulate filter is located in the exhaust. This happens like once every two weeks or so.


Thoughts?
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post #2 of 23 Old 02-14-2017
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What do you smell? Diesel?

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post #3 of 23 Old 02-14-2017 Thread Starter
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Quote:
Originally Posted by Xeno555 View Post
What do you smell? Diesel?

yeah smells like diesel smoke basically. Its a white smoke, same as what comes out the exhaust from time to time
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post #4 of 23 Old 02-14-2017
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Is it occurring when the engine is cold and the outside temperature low?
Possibly the auxiliary heater in the fender?
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post #5 of 23 Old 02-14-2017
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Does it happen after a good drive at operating temp? Does your engine fans stay on?

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post #6 of 23 Old 02-14-2017 Thread Starter
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Quote:
Originally Posted by Marbles View Post
Is it occurring when the engine is cold and the outside temperature low?
Possibly the auxiliary heater in the fender?
It has been happened with the engine warm before. The outside temp has been pretty low since I got the car.


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Does it happen after a good drive at operating temp? Does your engine fans stay on?
usually have been driving for a good 15 min or so on the highway. (I don't live far from work)
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post #7 of 23 Old 02-14-2017
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I think maybe you catching it in a regen cycle. When it injects fuel while the exhaust valves are open, starting a 'fire' in the DPF.

Normal? Unless if your DPF is cracked or seals from DPF to Turbo.

???

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post #8 of 23 Old 02-14-2017
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If you only drive it 15 minutes each way to work each day you are doing just about the worst journeys possible for any diesel - it just won't be getting hot enough for long enough especially if the weather is cold.

Take it for a good 30-45 minute blast somewhere where you can get it nice and hot and the revs high - hold it in gear using Tiptronic if necessary.

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post #9 of 23 Old 02-14-2017 Thread Starter
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I took it on an hour each way drive the other weekend and it didn't do the smoke thing. But right as I got to work this morning it started doing the smoke out the exhaust and it started a little under the hood (always happens together). Im guessing it has to do with the Regen cycle but not sure what would cause the smoke to come out of the engine bay. Possibly a small crack in a manifold/exhaust pipe
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post #10 of 23 Old 02-14-2017
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Or residue from spilled oil or small oil/fluid leak. Because during regen, it REALLY heats up.

I think a couple good regens (forced?) will probably burn that crap on the exterior off of the DPF for good.

Monitor and force regens via VCDS

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