MK6 R Blue Smoke on Start Up & Possible DSG niggle

[rapidattack]

Greetings,

I have a MK6 R (Oct 12 Build) which puffs blue smoke for about 5-10 seconds on start up.
Its pretty consistent, but most prevalent on cold start.

Yes its under warranty (2016), but what is likely to be?

Also, I've noticed 1st gear in my DSG is getting clunkier and noisier - particularly on stops. While im talking to a dealer, is there any other advice you can give or what i should ask for?


Thank you.
(Love my R )

[Lucas_R]

How many km's are on your engine? Is the car modified or stock and has it been serviced when required using the VW approved oil etc?

Burning oil generally will mean
1) oil getting past the piston rings
2) worn valve stem seals
3) turbo on its way out

None of these symptoms should be happening on a new car though (except perhaps a blown turbo which is still quite rare on these cars).

In saying that, it could possibly be something more simple like a failed PCV valve (either front or rear) which is quite a common failure on these engines, and known to cause oil burning (blue smoke) out of the exhaust. Luckily the PCV valves are both easy to fix and cheap.

[rapidattack]

Car is stock, 37k KM's.

Always serviced. Oil level looks reasonable too as of this week.

[scotty86]

Car is stock, 37k KM's.

Always serviced. Oil level looks reasonable too as of this week.

what happens when you go WOT?

[rapidattack]

Ive seen puffs out the back at times, but its not consistently doing it.

Also ran an injector cleaner through it to be sure.

[Lucas_R]

Its common to see black/grey smoke out the exhaust on WOT as its just unburnt fuel being spat out the back - normal on just about every car but more so on a turbo car.

Soooo low km's, stock engine, serviced on time and full of oil - so nothing wrong there. How often do you have to top up the oil (assuming you have to every now and then if its burning it)? Have you taken it to VW to look at yet considering you still have warranty?

You certainly shouldnt be seeing blue smoke for 5-10 seconds (or even 1 second) on a 37,000km old car - so it will be interesting to see what VW say. On the whole, the engines in the R are hugely reliable and can take a beating.

My Mk6 R is only 26,000km old, but has been modified since nearly day 1, and even though its had an easy life it certainly doesn't blow any blue smoke out the exhaust at any time.

[scotty86]

Its common to see black/grey smoke out the exhaust on WOT as its just unburnt fuel being spat out the back - normal on just about every car but more so on a turbo car.

I'm not trying to start an argument here, this is true however a correctly tuned turbo car shouldn't. Maybe a tiny bit but not a buff... I owned a Rotary Turbo and they are common for this (oil and fuel) and mine did it untill it was tuned correctly it would only do it on deaccel but with flames because of the unburnt fuel!
This is what annoys me with alot of these 'turners' like APR tune for across the board, not an individual car. As each motor reacts differently to whatever its got. In my honest opinion a CustomCode tune would be the best before aftermarket.. However this is another conversation and i don't want to hi-jack

This isn't the point here tho because the car is stock.

What about carbon build up???? I know it low on km's but could be carbon build up?

Some people are against it but could be worth a try running some upper engine cleaner from Subaru

[Brett_J]

I've had heaps of tuned turbo cars, and each has had a cloud of fuel smoke at instant WOT, if it is tuned to not do this, she's nearing on too lean. Rotors are a huge different kettle of fish, almost a different style of tuning completely.

In regards to this, is is definitely smoke ?
I know mine will have some cloudy crap from moisture, like you see on a cold day sometimes.

Otherwise, I blocked off the PCV return to the turbo inlet pipe, such a dumb design and it infuriates me on all my turbo cars. I prefer a catch can with it's own venting filter, but in WA they are less picky.

If it's valve stem seals, usually you'll get a cloud of smoke after sitting idling for a while, like at traffic lights for a couple of mins.

[scotty86]

I've had heaps of tuned turbo cars, and each has had a cloud of fuel smoke at instant WOT, if it is tuned to not do this, she's nearing on too lean. Rotors are a huge different kettle of fish, almost a different style of tuning completely.

Correct they are different but also Incorrect. Rotors are all about timing. Get it wrong at all and bang. However they still tune very much the same to that of a piston motor. Just the timing is different. However if a car has 'fuel smoke' out the tail pipe it shouldn't be clearly seen by the human eye It = running too rich and no where near running its efficiency. AFR's should be read exactly 1 meter from the turbo for the most accurate reading.

Again the car is stock and this isn't a fuel smoke, its a oil smoke (if its a blue tinge). I was simply asking if its a 'blue tinge' smoke from the rear on WOT, unburnt fuel = black

[parso_rex]

Its not unburnt fuel actually, its blowby oil that pools then gets burn't up when the flow is high enough to suck it through. The engines with more piston to bore clearance will be worse too and this varies alot in the GTI's and R's as they run forged internals. You can tell if its blowby by giving the car a big hit say three times and each time you do the amount of smoke will be a lot less. If its doing it continuously you have other issues.
Blowby has little to do with AFR's here, the stock cars will be .7x Lambda on boost which is very very rich and most tuned cars apart from some Viezu ones will be round .84 or richer. All will blow smoke. The more boost you run the more blowby you will have too

The guys up at Kirrawee or Rockdale VW would be able to sort it out for you and I know them personally, forget Southern classic they are complete morons incapable of detecting simple issues like torn diverter valves in GTIs even after mulitple visits FFS

I have seen one completely stock R require a new engine last year for similar issues

[ZantetsukenJ]

If it is valve seals, oil would be on the spark plugs as well - just another indicator.

[rapidattack]

Hey - is there anyone particular I should speak with at Rockdale or Kirrawee? (both are out the way)

Thanks!

[Gohard]

Thanks for the info guys, I have a mk6R STAGE 2+ and recently started seeing blue smoke after I have come down a hill off throttle and then when pulling away slowly there is a huge ball of blue smoke. When I drive more aggressively there is no blue smoke at all. Maybe black smoke when I thrash it after some nice driving. But that's normal from what I understand. Blue though... Valve stem seals?? Or do I need a catch can?