View Poll Results: Poll: Have you had bore scoring on your 997.1 or 997.2 engine?
Yes, 997.1 (05-08 MY)
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143
14.44%
Yes, 997.2 (09-12 MY)
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18
1.82%
No, 997.1 (05-08 MY)
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526
53.13%
No, 997.2 (09-12 MY)
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303
30.61%
Voters: 990. You may not vote on this poll
Poll: Scored cylinder failure for your 997, Y or N? tell us (yr, 997.1 or 997.2)
#1
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Many have been asking to understand how many of the 997 cars have had Bore Scoring failures or cylinder related related failure normally associated with the water cooling system being inadequate or cylinder liner being made of Lokasil. The failures could be due to the water cooling system being inadequate at times, cylinder liner being made of lokasil, or tolerances between piston and cylinder being too tight not taking into account of expansion differences that occur during cold (winter) weather.
List of potential damage can be inclusive of:
- scored cylinders
- scored pistons
- cracked cylinders, D-chunk
- etc etc
Although the people on this board are not necessarily a random sampling of 997 owners it would be interesting to see how many have experienced these failures. A friend just has his engine go and knowing there's a poll for IMS, I think this is a more alarming concern for 997 owners.
Please vote only once for each 997 you own (yes or no).. you can post multiple times but only vote once.
Please include details of your car and engine if it failed (997.1 or 997.2) and when.
Please let us know if there were any mitigating factors (smoke on start-up, increased oil consumption, increased knocking or lifter sounds, etc) that might have led to the failure.
Let us know if your car is a warm climate car, cold climate car, daily driven or weekend cruiser and how much mileage is on it.
Please post only for your car, no hearsay or posting for a friend who doesn't frequent the board.
Please post what was done to rectify the failure if your engine failed (CPO engine, engine out of pocket, used engine, sold, insurance fire, pushed it into a river etc).
Hopefully this will help owners and soon-to-be owners get a sense of how frequently this occurs.
List of potential damage can be inclusive of:
- scored cylinders
- scored pistons
- cracked cylinders, D-chunk
- etc etc
Although the people on this board are not necessarily a random sampling of 997 owners it would be interesting to see how many have experienced these failures. A friend just has his engine go and knowing there's a poll for IMS, I think this is a more alarming concern for 997 owners.
Please vote only once for each 997 you own (yes or no).. you can post multiple times but only vote once.
Please include details of your car and engine if it failed (997.1 or 997.2) and when.
Please let us know if there were any mitigating factors (smoke on start-up, increased oil consumption, increased knocking or lifter sounds, etc) that might have led to the failure.
Let us know if your car is a warm climate car, cold climate car, daily driven or weekend cruiser and how much mileage is on it.
Please post only for your car, no hearsay or posting for a friend who doesn't frequent the board.
Please post what was done to rectify the failure if your engine failed (CPO engine, engine out of pocket, used engine, sold, insurance fire, pushed it into a river etc).
Hopefully this will help owners and soon-to-be owners get a sense of how frequently this occurs.
Last edited by CamsPorsche; 04-27-2016 at 06:34 PM. Reason: added information for engine failure purposes.
The following 3 users liked this post by CamsPorsche:
#2
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
MODS - can we make this a sticky please?
Thanks - Cam
Thanks - Cam
#7
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
997.1S '05, 30k miles / 50k km
NEVER driven in winter or cold weather, NO random 1 or 2 day drives during dry winter days (avoiding unnessary cold starts), only start up the car in spring when 7 degree celsius for a few days... then typical driving for 6 months during warm+hot summer months.
no signs.
NEVER driven in winter or cold weather, NO random 1 or 2 day drives during dry winter days (avoiding unnessary cold starts), only start up the car in spring when 7 degree celsius for a few days... then typical driving for 6 months during warm+hot summer months.
no signs.
Last edited by myw; 04-27-2016 at 04:17 PM.
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#8
Drifting
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Recent bore scoring failure at 78k kms
2006 997.1 in Toronto
DD and winter driven for 4 years
has seen track time but not extensive
used as a commuter but also for long drives like the recent Hershey trip
exploring options now
Cam, u r going to make me relive this experience through this poll
2006 997.1 in Toronto
DD and winter driven for 4 years
has seen track time but not extensive
used as a commuter but also for long drives like the recent Hershey trip
exploring options now
Cam, u r going to make me relive this experience through this poll
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
#9
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
'05 3.6L just over 60K mi. Car has lived its entire life in hot, tropical climate, driven daily, never tracked, always driven gently (upshifts at 3Krpm) until oil temp over 175-180, oil and filter every 6 months, all other regular maintenance by the book, always gassed with 93 octane at the corner Chevron.
I'm not sure how to answer the poll question, because technically I did not have scoring of the bore itself, just on the piston skirts, which is a precursor to eventual bore scoring.
I'm not sure how to answer the poll question, because technically I did not have scoring of the bore itself, just on the piston skirts, which is a precursor to eventual bore scoring.
#10
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
- the water cooling system being inadequate at times
- cylinder liner being of lokasil
- tolerances between piston and cylinder being too tight not taking into account of expansion differences that occur during cold (winter) weather.
he will be adding the list of potential damage inclusive of
- scored cylinders
- scored pistons
- cracked cylinders, D-chunk
- etc etc
perhaps there should be another option up there for those who are aware they have a (relatively mild) issue of some sort; but car still drivable without issues (such as in BenZ case)... this way the poll takes more into effect real life usage and is a little less black and white.
#11
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Engine was replaced by previous owner on 5/14 due to bore scoring @ 24k miles. Other previous owners located in the midwest and Alaska and I've got no information on how the car was driven or during what season.
Engine runs great now and I've sent 2 oil samples to Blackstone and have gotten good results.
Engine runs great now and I've sent 2 oil samples to Blackstone and have gotten good results.
Last edited by mike9186; 06-04-2017 at 02:02 PM.
#13
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2006 C2S; 90K kms
Never winter driven by me. I owned this car for 3 yrs, so I don't know if prev owner drove winters. Noticed abnormally high oil consumption in Sept 2015. Changed oil immediately. Drove till Nov, no probs. Put her away for winter. Start up in March 2016 (about 5 deg celcius) and started noticing white smoke from passenger side exhaust. Turns out to be D-chunk cylinder 1. From my non-professional visual inspection, I didn't see any sign of scoring, so I'm not sure how to vote here. Edit: I voted "Yes, 997.1".
Never winter driven by me. I owned this car for 3 yrs, so I don't know if prev owner drove winters. Noticed abnormally high oil consumption in Sept 2015. Changed oil immediately. Drove till Nov, no probs. Put her away for winter. Start up in March 2016 (about 5 deg celcius) and started noticing white smoke from passenger side exhaust. Turns out to be D-chunk cylinder 1. From my non-professional visual inspection, I didn't see any sign of scoring, so I'm not sure how to vote here. Edit: I voted "Yes, 997.1".
Last edited by artyve; 04-29-2016 at 12:45 PM.
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JEHolloway (01-11-2020)
#14
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Many have been asking to understand how many of the 997 cars have had Bore Scoring failures or cylinder related related failure normally associated with the water cooling system being inadequate or cylinder liner being made of Lokasil. The failures could be due to the water cooling system being inadequate at times, cylinder liner being made of lokasil, or tolerances between piston and cylinder being too tight not taking into account of expansion differences that occur during cold (winter) weather.
List of potential damage can be inclusive of:
- scored cylinders
- scored pistons
- cracked cylinders, D-chunk
- etc etc
Although the people on this board are not necessarily a random sampling of 997 owners it would be interesting to see how many have experienced these failures. A friend just has his engine go and knowing there's a poll for IMS, I think this is a more alarming concern for 997 owners.
Please vote only once for each 997 you own (yes or no).. you can post multiple times but only vote once.
Please include details of your car and engine if it failed (997.1 or 997.2) and when.
Please let us know if there were any mitigating factors (smoke on start-up, increased oil consumption, increased knocking or lifter sounds, etc) that might have led to the failure.
Let us know if your car is a warm climate car, cold climate car, daily driven or weekend cruiser and how much mileage is on it.
Please post only for your car, no hearsay or posting for a friend who doesn't frequent the board.
Please post what was done to rectify the failure if your engine failed (CPO engine, engine out of pocket, used engine, sold, insurance fire, pushed it into a river etc).
Hopefully this will help owners and soon-to-be owners get a sense of how frequently this occurs.
List of potential damage can be inclusive of:
- scored cylinders
- scored pistons
- cracked cylinders, D-chunk
- etc etc
Although the people on this board are not necessarily a random sampling of 997 owners it would be interesting to see how many have experienced these failures. A friend just has his engine go and knowing there's a poll for IMS, I think this is a more alarming concern for 997 owners.
Please vote only once for each 997 you own (yes or no).. you can post multiple times but only vote once.
Please include details of your car and engine if it failed (997.1 or 997.2) and when.
Please let us know if there were any mitigating factors (smoke on start-up, increased oil consumption, increased knocking or lifter sounds, etc) that might have led to the failure.
Let us know if your car is a warm climate car, cold climate car, daily driven or weekend cruiser and how much mileage is on it.
Please post only for your car, no hearsay or posting for a friend who doesn't frequent the board.
Please post what was done to rectify the failure if your engine failed (CPO engine, engine out of pocket, used engine, sold, insurance fire, pushed it into a river etc).
Hopefully this will help owners and soon-to-be owners get a sense of how frequently this occurs.
#15
Rennlist Member
Thread Starter
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What do you suggest is added to the thread for 997.2's and the DFI engine?