Cayman S engine failure and how Porsche will deal with you.
Discussion
that post was about buying a c2s pdk and not a mention of failure in the title!so why would i read it! if it said c2s pdk engine failure or new engine/on my 2nd engine i would have read it.after being someone who suffered engine failure over 7 years ago you tend to keep up with whats going especially when you have then bought 2 more porsches since.
Well ITSBITSY - I agree that the long service intervals will not help and keeping the quality of the oil up to scratch can do no harm.
However while this may help reduce cylinder scoring - it will make no difference to eventual cracking as this is a fundtion of the loads on the piston transferring to the cylinder walls and putting them under hoop stress that they are a little too thin to resist for ever.
The Gen 2 engines with closed deck will avoid this phenomenon (as the closed deck supports the cylinder tubes) - so is a step in the right direction and although I have not managed to see inside one yet - from the drawings and specifications they look really good.
My only concern is the use of the "Ferroprinted" pistons running in Alusil - that should be OK until the coating wears out and then could be a problem - but this will probably be a long way off (as the same materials and system is used in the V8 Cayenne S with higher mileage ones just starting to come through with scored bores! Earlier failures of the pistons were mainly due to overheating caused by the coolant transfer pipe leaking - it is only over 100K that we are starting to receive enquiries for rebuild.
Baz
just dug this up as i remember this from sometime ago from Hartech
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
However while this may help reduce cylinder scoring - it will make no difference to eventual cracking as this is a fundtion of the loads on the piston transferring to the cylinder walls and putting them under hoop stress that they are a little too thin to resist for ever.
The Gen 2 engines with closed deck will avoid this phenomenon (as the closed deck supports the cylinder tubes) - so is a step in the right direction and although I have not managed to see inside one yet - from the drawings and specifications they look really good.
My only concern is the use of the "Ferroprinted" pistons running in Alusil - that should be OK until the coating wears out and then could be a problem - but this will probably be a long way off (as the same materials and system is used in the V8 Cayenne S with higher mileage ones just starting to come through with scored bores! Earlier failures of the pistons were mainly due to overheating caused by the coolant transfer pipe leaking - it is only over 100K that we are starting to receive enquiries for rebuild.
Baz
just dug this up as i remember this from sometime ago from Hartech
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Edited by itsybitsy on Thursday 23 May 18:44
khushy said:
23/05/13 - BREAKING NEWS - NISSAN recall 188,000 vehicles - which renders all Rice-Burners ever made - DANGEROUS and UNRELIABLE!!!
please discuss!
PS - I have done 56,000 miles in my Spyder - and its never missed a beat!
khushy
At least they are taking responsibility for their failing, which is relatively minor in any case.please discuss!
PS - I have done 56,000 miles in my Spyder - and its never missed a beat!
khushy
itsybitsy said:
wheres the evidence i have yet to see a single case!
It was my car. I posted the photos of the cylinders from GT one of all 6 scored and it was on 6k miles, it was a white gen 2 on an 09 plate bought from Cridfords, who fully refunded me within a week. Porsche service centre in Brooklands also saw the photos and will confirm this for you. You could call Cridfords or Porsche Brooklands and ask, they'll remember it, alternatively I posted a thread on planet 9 regarding it, and have also posted on here too. As for pics, I think I deleted them all, they are on my work PC, if I still have them I will post them, but they are not all that interesting. This happened approx 2 years ago. I think the number plate was GY09 XXC but can't remember as I had the car for a matter of days!So, cmoose was correct I'm afraid!
EDIT - here we are
http://www.planet-9.com/987-cayman-boxster-problem...Edited by premio on Thursday 23 May 22:14
itsybitsy said:
Well ITSBITSY - I agree that the long service intervals will not help and keeping the quality of the oil up to scratch can do no harm.
However while this may help reduce cylinder scoring - it will make no difference to eventual cracking as this is a fundtion of the loads on the piston transferring to the cylinder walls and putting them under hoop stress that they are a little too thin to resist for ever.
The Gen 2 engines with closed deck will avoid this phenomenon (as the closed deck supports the cylinder tubes) - so is a step in the right direction and although I have not managed to see inside one yet - from the drawings and specifications they look really good.
My only concern is the use of the "Ferroprinted" pistons running in Alusil - that should be OK until the coating wears out and then could be a problem - but this will probably be a long way off (as the same materials and system is used in the V8 Cayenne S with higher mileage ones just starting to come through with scored bores! Earlier failures of the pistons were mainly due to overheating caused by the coolant transfer pipe leaking - it is only over 100K that we are starting to receive enquiries for rebuild.
Baz
just dug this up as i remember this from sometime ago from Hartech
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Are you actually questioning someone who has had a failure?!?However while this may help reduce cylinder scoring - it will make no difference to eventual cracking as this is a fundtion of the loads on the piston transferring to the cylinder walls and putting them under hoop stress that they are a little too thin to resist for ever.
The Gen 2 engines with closed deck will avoid this phenomenon (as the closed deck supports the cylinder tubes) - so is a step in the right direction and although I have not managed to see inside one yet - from the drawings and specifications they look really good.
My only concern is the use of the "Ferroprinted" pistons running in Alusil - that should be OK until the coating wears out and then could be a problem - but this will probably be a long way off (as the same materials and system is used in the V8 Cayenne S with higher mileage ones just starting to come through with scored bores! Earlier failures of the pistons were mainly due to overheating caused by the coolant transfer pipe leaking - it is only over 100K that we are starting to receive enquiries for rebuild.
Baz
just dug this up as i remember this from sometime ago from Hartech
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Edited by itsybitsy on Thursday 23 May 18:44
premio said:
itsybitsy said:
wheres the evidence i have yet to see a single case!
It was my car. I posted the photos of the cylinders from GT one of all 6 scored and it was on 6k miles, it was a white gen 2 on an 09 plate bought from Cridfords, who fully refunded me within a week. Porsche service centre in Brooklands also saw the photos and will confirm this for you. You could call Cridfords or Porsche Brooklands and ask, they'll remember it, alternatively I posted a thread on planet 9 regarding it, and have also posted on here too. As for pics, I think I deleted them all, they are on my work PC, if I still have them I will post them, but they are not all that interesting. This happened approx 2 years ago. I think the number plate was GY09 XXC but can't remember as I had the car for a matter of days!So, cmoose was correct I'm afraid!
itsybitsy said:
i think i remember seeing this,was this a cayman 2.9 which is known about on early cars and pistons/rings were upgraded
Yes this was a 2.9, and no idea what happened after or the ins and outs of the faults, I heard a lot of theories but got a refund and went back to BMW for a new Z4. Still a gen 2 with bore score though!_Batty_ said:
Are you actually questioning someone who has had a failure?!?
no they were saying it was bore scoring like seen on a gen1 when it could have been a random failure due to overheating.the fact it is an early pdk and it has been reported on rentech that problems have occured on early gen2 pdk.so actually no proof of bore scoring due to poor engine design ala gen1 hence my hartech postanonymous said:
[redacted]
what utter bull i am fully aware of the gen1 problems but gen2 engines are another story.YES early 2.9 engines had issues with pistons/rings as per premio and YES early pdk cars had issues but this does not equal bore scoring as seen on gen1 cars .and as i said before yes bore scoring may ocur on engines with excess of 100k or is baz of hartech talking cr*pitsybitsy said:
what utter bull i am fully aware of the gen1 problems but gen2 engines are another story.YES early 2.9 engines had issues with pistons/rings as per premio and YES early pdk cars had issues but this does not equal bore scoring as seen on gen1 cars .and as i said before yes bore scoring may ocur on engines with excess of 100k or is baz of hartech talking cr*p
Are you actually saying there wasn't scoring on my gen 2? I will try and dig out photos but they won't really mean anything as they could be a picture of anything. Do you genuinely believe there was no scoring?! 
the engine was written off by Porsche! premio said:
anonymous said:
[redacted]
I got a lot of denials over on planet 9 I think! There was no denying the situ when the dealer was writing me a refund cheque for £29,999 the poor bugger 
premio said:
itsybitsy said:
what utter bull i am fully aware of the gen1 problems but gen2 engines are another story.YES early 2.9 engines had issues with pistons/rings as per premio and YES early pdk cars had issues but this does not equal bore scoring as seen on gen1 cars .and as i said before yes bore scoring may ocur on engines with excess of 100k or is baz of hartech talking cr*p
Are you actually saying there wasn't scoring on my gen 2? I will try and dig out photos but they won't really mean anything as they could be a picture of anything. Do you genuinely believe there was no scoring?! the engine was written off by Porsche! itsybitsy said:
its about what caused the scoring.low coolant can cause a heat seizure and cause scoring.your scoring was down to bad pistons/rings.the bore scoring on gen1 cars is down to bad coolant flow and bore material.hence gen2 engines have improved in both areas
Still happens though. anonymous said:
[redacted]
yes but how did it happen!low coolant? overrevs?but i want proof its bad engine design like the gen1 which i doubt.i go out tomorrow thrash the nuts of my car with low coolant from cold seize the engine thus causing bore scoring so it must be bad engine design.
until someone like hartech starts posting that he is seeing gen2 engines with less than 100k coming through his door with bore scoring due to poor design then we will have this chat again.yes you will always get random failures and poor build quality on early new model cars as seen lately on the 991 but that does not equate to poor design like the m96/7 engine
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