991.2 GTS SMOKING

[Polome]

Hi My car has been smoking badly (oil smoke) from exhaust after a hard run. The garage has faffed about a bit and after a month diagnosed it needs one new turbo. That’s good , happy with that..my question is …. Is the GTS exhaust a single box that is fed by each cylinder bank or does it have dividing internal baffle so each cylinder bank has it own exhaust tip. My exhaust has twin outlets and both pipes smoke badly. If the exhaust silencer is one piece and fed by both banks I can understand why only one failed turbo can cause smoke from both outlet pipes . My concern is that both turbos may be faulty creating smoke. Previous generations of 911 had separate exhaust for each bank so problem diagnosis was much easier with cases like this. The car has a standard Porsche sports exhaust with switchable valves. Any thoughts?

Edited by Polome on Tuesday 25th July 16:24

Edited by Polome on Tuesday 25th July 18:13

[Deanmg]

Both banks feed into a single box across the back of the car.

[Polome]

Thanks for the info…it’s what I though but hoped it was internally separated..will have to wait and see if smoke gone when single turbo replaced…

[fistenburger]

When my old 991.2 S had turbo failure it smoked like a b*stard through both pipes. Only one turbo had failed and was replaced under warranty.

[Edible Roadkill]

Is this quite a common issue with 991.2 gts ?

I watched the YouTube videos of the guy that owns Mallory performance (unit next to Matt Armstrong) rebuild a crash damaged 991.2 gts and he just had one of his turbos fail.

[bosshog]

My 991.2 S had both turbos replaced at 14k miles and again at 19k miles just as I sold it. It’s a real weak point of the car. Don’t know if 992s suffer the same. I’d never own one without a warranty that’s for sure !

[Grantstown]

They’re fully exposed to the elements, so they’ll get frequently covered in salt if the car is driven in the winter. I think the issue is with the oil feed failing. Litchfield motors do an upgrade on an exchange basis, which I’m thinking of doing at some point if it will reduce the chances of failure. Up to 29K miles with no issues, but not driven in the winter.

[Polome]

A bit of feedback on my car…delivered to my home from OPC yesterday 😀( great service as usual ) It’s had a new turbo on drivers side , oil separator and turbo oil drain pot/pipe mods to both sides. Other turbo was inspected and deemed ok. Had car out last night for a fast drive and boosting well…and no sign of oil smoke 😁 it’s taken a while , parts needed from Germany but all good now…thanks for above contributors .

[Coxey]

Think this has just happened to my 991.2S going into the OPC tomorrow - it’s smoking like I’ve never seen absolutely gutted….

[NRG1976]

Coxey said:

Think this has just happened to my 991.2S going into the OPC tomorrow - it’s smoking like I’ve never seen absolutely gutted….

If you have a warranty don’t be gutted, just one of those things.

[Guyr]

Interesting and disappointing, but it does again highlight what an absolute bargain the 911 warranty is at circa £1k per annum, especially in comparison to Ferrari/Mclaren at £4-5k pa.

[bosshog]

It's so common this issue. Wonder if the 992 suffers the same?

[MarkM3Evoplus]

Pretty poor for turbos to fail at such low mileage. Porsche reliability certainly doesn't seem to be what it was in the aircooled era

[Guybrush]

Polome: "...It’s had a new turbo on drivers side , oil separator and turbo oil drain pot/pipe mods to both sides..." Any idea what these mods to the oil separator and turbo drain pipes are?

[Polome]

Guybrush said:

Polome: "...It’s had a new turbo on drivers side , oil separator and turbo oil drain pot/pipe mods to both sides..." Any idea what these mods to the oil separator and turbo drain pipes are?

Hi Guy. I’ve attached a pic of passenger underside . It shows the new turbo oil drain pot and its outlet stainless pipe. I think the pipe goes to oil separator area ( not 100% sure)
The initial repair was the two new drain pots and pipework. (This didn’t fix smoking and car had to return to OPC for new turbo etc.) I did ask the tech if the recognised repair kit (supplied by Porsche as first method/fix of smoking ) was visibly different to the original he removed…his reply …nothing obvious but “maybe” internal dia of pipe was bigger . I thought the oil take off pipe might be fitted lower down in the drain pot effectively lowering the oil level but the configuration doesn’t allow that either. So sorry nothing obvious between old and new fittings. The oil separator ( original fitment , not part of mod package) was heavily contaminated because of oil seal leakage in turbo and deemed “uncleanable” so replaced. The intercooler on that bank was also flushed to remove oil residue. Early on in my problems I did speak to tech at Parr motorsport , very knowledgeable with this fault , they probably have more hands on experience than OPC ‘s with this type of thing , if your having troubles might be worth a talk with them. My car performing well now but considering one turbo’s already gone ( @ only 16k miles) I suspect its mate is on borrowed time. Good luck Ian

Edited by Polome on Thursday 31st August 19:09

[politeperson]

The Turbos on my 992 are fine at 50,000 miles.

It doesn't use a drop between services which are about every 15,000 miles.

Probably helps them being used so much. They are very exposed though.

Don't leave it for the next guy I say.

[Polome]

politeperson said:

The Turbos on my 992 are fine at 50,000 miles.

It doesn't use a drop between services which are about every 15,000 miles.

Probably helps them being used so much. They are very exposed though.

Don't leave it for the next guy I say.

Lack of use isn’t my problem…6k/year for past 2 years, ( my ownership ) , half a dozen track days and 172mph at run the runway last Sunday…well used I’d say ….

[Guybrush]

Polome said:

Guybrush said:

Polome: "...It’s had a new turbo on drivers side , oil separator and turbo oil drain pot/pipe mods to both sides..." Any idea what these mods to the oil separator and turbo drain pipes are?

Hi Guy. I’ve attached a pic of passenger underside . It shows the new turbo oil drain pot and its outlet stainless pipe. I think the pipe goes to oil separator area ( not 100% sure)
The initial repair was the two new drain pots and pipework. (This didn’t fix smoking and car had to return to OPC for new turbo etc.) I did ask the tech if the recognised repair kit (supplied by Porsche as first method/fix of smoking ) was visibly different to the original he removed…his reply …nothing obvious but “maybe” internal dia of pipe was bigger . I thought the oil take off pipe might be fitted lower down in the drain pot effectively lowering the oil level but the configuration doesn’t allow that either. So sorry nothing obvious between old and new fittings. The oil separator ( original fitment , not part of mod package) was heavily contaminated because of oil seal leakage in turbo and deemed “uncleanable” so replaced. The intercooler on that bank was also flushed to remove oil residue. Early on in my problems I did speak to tech at Parr motorsport , very knowledgeable with this fault , they probably have more hands on experience than OPC ‘s with this type of thing , if your having troubles might be worth a talk with them. My car performing well now but considering one turbo’s already gone ( @ only 16k miles) I suspect its mate is on borrowed time. Good luck Ian

Edited by Polome on Thursday 31st August 19:09

Thanks.

[Grantstown]

Polome said:

Hi Guy. I’ve attached a pic of passenger underside . It shows the new turbo oil drain pot and its outlet stainless pipe. I think the pipe goes to oil separator area ( not 100% sure)
The initial repair was the two new drain pots and pipework. (This didn’t fix smoking and car had to return to OPC for new turbo etc.) I did ask the tech if the recognised repair kit (supplied by Porsche as first method/fix of smoking ) was visibly different to the original he removed…his reply …nothing obvious but “maybe” internal dia of pipe was bigger . I thought the oil take off pipe might be fitted lower down in the drain pot effectively lowering the oil level but the configuration doesn’t allow that either. So sorry nothing obvious between old and new fittings. The oil separator ( original fitment , not part of mod package) was heavily contaminated because of oil seal leakage in turbo and deemed “uncleanable” so replaced. The intercooler on that bank was also flushed to remove oil residue. Early on in my problems I did speak to tech at Parr motorsport , very knowledgeable with this fault , they probably have more hands on experience than OPC ‘s with this type of thing , if your having troubles might be worth a talk with them. My car performing well now but considering one turbo’s already gone ( @ only 16k miles) I suspect its mate is on borrowed time. Good luck Ian

Edited by Polome on Thursday 31st August 19:09

Thank you. I’ll ask my local garage to get these fitted on both sides I think.

[Grantstown]

https://www.litchfieldmotors.com/porsche/911-2-car...

It looks like Litchfield have a solution for this as well.