Smoking 991.2 CS
Discussion
I've owned my 991.2 CS since June last year. It's currently on 11.5k miles, but has recently developed a heavy smoking habit. I can see a few threads that suggest that other owners have had similar issues, but nothing I have read suggests a common cause.
Symptoms: After a decent 30 minute run out - getting the car thoroughly warmed through before extending it - and a decent run through 3rd and 4th gear on a deserted road, I then take the car home gently and let everything cool nicely. If I then leave it until the next day, and do a cold start, I get a big plume of white smoke out of the exhausts on startup. Every time.
I then noticed a cloud of blue oil smoke following me through a 20mph limit the other day - i.e. visible out of the rear view mirror!
Booked it into my OPC to get my winter tyres swapped over for the summer set & asked them to take a look at the smoke. I made sure I parked it up after a decent run so they would get the white smoke treatment. They did, but claimed they couldn't recreate it after that.
No error codes, no smoke as far as they were concerned, so they gave the car back to me.
Since then, I took it on a long run through South Wales and the Brecons today with a mate in his MX-5. I was hardly thraping it, but had a couple of runs up the first few gears. Nothing stupid. I ended up having to top up with oil halfway through the trip as I was reading right on the bottom-end of green on the oil display, after being almost full for the previous 3 days. Good oil pressure though.
End result is that since collecting the car from OPC, i've used 1.5litres of oil in 320 miles, and get smoke on each cold start after the car's been on full & briefly-sustained boost.
Video here of this morning's cold-start smoke : https://youtu.be/Nnos246VU90
No idea what could be causing this. Any suggestions?
Will be taking it back to my OPC this week.
Symptoms: After a decent 30 minute run out - getting the car thoroughly warmed through before extending it - and a decent run through 3rd and 4th gear on a deserted road, I then take the car home gently and let everything cool nicely. If I then leave it until the next day, and do a cold start, I get a big plume of white smoke out of the exhausts on startup. Every time.
I then noticed a cloud of blue oil smoke following me through a 20mph limit the other day - i.e. visible out of the rear view mirror!
Booked it into my OPC to get my winter tyres swapped over for the summer set & asked them to take a look at the smoke. I made sure I parked it up after a decent run so they would get the white smoke treatment. They did, but claimed they couldn't recreate it after that.
No error codes, no smoke as far as they were concerned, so they gave the car back to me.
Since then, I took it on a long run through South Wales and the Brecons today with a mate in his MX-5. I was hardly thraping it, but had a couple of runs up the first few gears. Nothing stupid. I ended up having to top up with oil halfway through the trip as I was reading right on the bottom-end of green on the oil display, after being almost full for the previous 3 days. Good oil pressure though.
End result is that since collecting the car from OPC, i've used 1.5litres of oil in 320 miles, and get smoke on each cold start after the car's been on full & briefly-sustained boost.
Video here of this morning's cold-start smoke : https://youtu.be/Nnos246VU90
No idea what could be causing this. Any suggestions?
Will be taking it back to my OPC this week.
I remember this thread from a while back on a 991.2 with the exact same symptoms. Turned out to be a blown turbo and I’ve heard of a few other early 991.2s it’s happened to. Worth checking.
https://www.pistonheads.com/gassing/topic.asp?h=0&...
https://www.pistonheads.com/gassing/topic.asp?h=0&...
Just got my car back after having it diagnosed and fixed under Porsche warranty.
Root cause appears to be machining issues with the turbo oil drain pipes, which somehow causes excess oil to back-up to the turbo and burn-off in the exhaust. Mine was apparently quite bad in that the amount of oil within the turbo caused the tips of the blades to wear away as they were swimming in the stuff at high rpm. Can't remember which side of the turbo this was - sorry. Must have been a lot of oil & pressure to break through the oil seals.
Engine & gearbox had to be removed to conduct full diagnosis and repair, so not a small job.
Anyway, new drain pipes, new turbo and 3 weeks later and it's all fixed.
Root cause appears to be machining issues with the turbo oil drain pipes, which somehow causes excess oil to back-up to the turbo and burn-off in the exhaust. Mine was apparently quite bad in that the amount of oil within the turbo caused the tips of the blades to wear away as they were swimming in the stuff at high rpm. Can't remember which side of the turbo this was - sorry. Must have been a lot of oil & pressure to break through the oil seals.
Engine & gearbox had to be removed to conduct full diagnosis and repair, so not a small job.
Anyway, new drain pipes, new turbo and 3 weeks later and it's all fixed.
Hi all, just picked up my 991.2 4S last week and experienced the exact same symptoms as the topic starter on day 1 of ownership. It got so bad I decided to have the car towed after a mere 7 hours of getting the car... It is is now still at the OPC awaiting diagnosis but it sounds to me that is the exact same problem ie the turbo, and or the oil drain pipes which then allow too much oil in the turbos and cause the issues. It had just gotten the 20k Miles service the day before...
tabsz4 said:
Hi all, just picked up my 991.2 4S last week and experienced the exact same symptoms as the topic starter on day 1 of ownership. It got so bad I decided to have the car towed after a mere 7 hours of getting the car... It is is now still at the OPC awaiting diagnosis but it sounds to me that is the exact same problem ie the turbo, and or the oil drain pipes which then allow too much oil in the turbos and cause the issues. It had just gotten the 20k Miles service the day before...
Hi there, How did you get on please?
I ask, as we collected a 2016 991.2 S yesterday. We used it last night for a couple of decent drives and noticed nothing wrong.
Cold start to day was fine, but then any warm start after a decent run, was accompanied by an sickly oily plume!
Going by the dash dig I dip-stick, it had used about 1/3 litre in 210 miles
We currently have our fingers crossed for a more helpful OPC attitude.
It was collected on a trailer and will be looked at on Monday I guess.
Annoying and
I had both turbos replaced on my 991.2 C2, following a problem with plumes of smoke being emitted. OPC sorted it under warranty (thank god!), while saying there was no history of such problems. They found oil in one turbo and then the other, and it took several weeks for them to get the spare parts in, and do the work.
A bit worrying on a car with less than 20k on it. It had already had a rear wheel bearing replaced, which also was disappointing on a high quality car.
All ok now, but will the turbo problem recurring.......?
A bit worrying on a car with less than 20k on it. It had already had a rear wheel bearing replaced, which also was disappointing on a high quality car.
All ok now, but will the turbo problem recurring.......?
eric1000 said:
I had both turbos replaced on my 991.2 C2, following a problem with plumes of smoke being emitted. OPC sorted it under warranty (thank god!), while saying there was no history of such problems. They found oil in one turbo and then the other, and it took several weeks for them to get the spare parts in, and do the work.
A bit worrying on a car with less than 20k on it. It had already had a rear wheel bearing replaced, which also was disappointing on a high quality car.
All ok now, but will the turbo problem recurring.......?
Well that’s good to know in some ways I guess. Thanks for the reply A bit worrying on a car with less than 20k on it. It had already had a rear wheel bearing replaced, which also was disappointing on a high quality car.
All ok now, but will the turbo problem recurring.......?
Let’s see what the OPC feedback is tomorrow.
I have had a similar issue which left me without a car for 46 days last year and the OPD has had it since 8th July saying that there is nothing wrong. I believe that Porsche is happy to push this issue until the warranty runs out thus leaving me the expense to have the engine replaced.
ferrar said:
I have had a similar issue which left me without a car for 46 days last year and the OPD has had it since 8th July saying that there is nothing wrong. I believe that Porsche is happy to push this issue until the warranty runs out thus leaving me the expense to have the engine replaced.
That’s a pretty poor show! I hope you can get it looked at and diagnosed elsewhere then? It might cost a few pounds, but at this point I guess you just want to know what’s exactly wrong and what to kick off about.
Update.....
Car delivered to OPC today. Sept 1st, so was hard to get through to anybody
Workshop are fairly sure it’s valued oil piles feeding the turbos, which are not operating as they should.
They said there is a technical bulletin regarding the issue, so we’ll see.
I know this is not my thread, so sorry to the OP.
I hope all this info in one place might help others.
Updates to follow.
Technical bulletin means recall in other manufacturers terminology.They clearly know there is a manufacturing defect and should be getting every car back in with that potential fault and fix it foc.It's a shame the Germans only fix cars from those that complain.They should take a leaf out of the Japanese book on looking after customers regardless of the cost.
grumpynuts said:
Technical bulletin means recall in other manufacturers terminology.They clearly know there is a manufacturing defect and should be getting every car back in with that potential fault and fix it foc.It's a shame the Germans only fix cars from those that complain.They should take a leaf out of the Japanese book on looking after customers regardless of the cost.
I think it’s because this isn’t a safety issue, they don’t recall, just fix symptomatic cars.We collected ours today and all seems well so far.
They replaced the oil return pipes, which include valves to stop outward bound lubricants running back after switch off.
Well it’s not fixed!
We did an 80mile trip to the coast last night and really enjoyed the car.
It seems to be running perfectly.
Started it this afternoon (24deg C) and the drive and front of house was engulfed in a cloud of white / blue smoke!
Such a shame
We’ll be asking OPC what they plan to do next....
Germany / road trip next week, so not sure we want to drive it 2000 miles lime this. We’ll not be popular re-starting it on the train.
We did an 80mile trip to the coast last night and really enjoyed the car.
It seems to be running perfectly.
Started it this afternoon (24deg C) and the drive and front of house was engulfed in a cloud of white / blue smoke!
Such a shame
We’ll be asking OPC what they plan to do next....
Germany / road trip next week, so not sure we want to drive it 2000 miles lime this. We’ll not be popular re-starting it on the train.
Mark-960ml said:
Any update on your car RED 5 ? Mines just gone in for the same issue
Hiya, Sorry I forgot about this thread, what with all the drama!
OPC Guildford told us to use the car as planned and ignore the start up smoke.
They agreed to book in for new turbo/s.
So we see set off for CZ.
When we hit Germany, we immediately lost a turbo in a MASSIVE cloud of smoke!
Limped into Aarchen services.
So we used Porsche assist / ADAC / SIXT to continue our holiday, trip home and following two weeks in four different hire cars!
Aarchen fitted 2 x Turbo (under warranty) and we took a day off Eurotunnel trip to collect in person.
Aachen OPC were great btw.
Assist paid our repatriation travel costs, minus petrol, so happy about that.
They did offer to trailer it back, but we had a spare day and fancied a drive
All well now
Two new turbos at under 8k miles though!
Edit : YES we kicked ourselves and felt stupid!
We should have taken the other perfectly functional Porsche we had sitting at home!
The temptation to play with new toys on the Autobahn and believe the Guildford OPC prognosis was too great to ignore!
Edited by Red 5 on Friday 15th November 15:38
Edited by Red 5 on Friday 15th November 16:04
Gassing Station | 911/Carrera GT | Top of Page | What's New | My Stuff