Bore scoring
11-16-2022, 01:06 PM
#31
Rennlist Member
My 997.2 MA1.01 was a Florida car with 33k miles when I bought it in February, 2021. Pre purchase inspection noted some minor issues which the shop repaired but bore scope allegedly showed no scoring and the car had a clean over rev report. This spring, 6000 miles and 2 oil/filter changes later, we found non-ferrous metal particles in the oil filter and significantly more in the sump. Bore scope showed scoring in all cylinders, most severe in 1 & 3. Engine most likely requires full rebuild but many parts are backordered. Neither the body/suspension or engine showed any typical signs of abuse or neglect and full service records from 2009 showed regular 6 month oil changes, often at 1000 to 1500 miles or less, and all required service yet here we are... :-(
Another 997.2 with Bore Scoring. I have seen several Posts with 997.2's with Bore Scoring and as the 997.s cars rack up miles I believe the % will rise.
In summary and my thinking for the past few years, buying a 997.1 or 997.2 with higher miles (80K-110K) that has clean cylinder walls and excellent PPI is probably better insurance regarding engine health.
This is why I purchased my 107K C4 last year. If these cars are babied and extremely well cared for/garaged/serviced/etc higher miles is a great way to go - Saves some $$ and more peace of mind on 997 ownership.
I'm wondering if higher mileage 997's with clean cylinders will fetch a premium soon?? Fingers crossed
Last edited by groovzilla; 11-16-2022 at 01:14 PM.
11-16-2022, 01:46 PM
#32
Rennlist Member
My 997.2 MA1.01 was a Florida car with 33k miles when I bought it in February, 2021. Pre purchase inspection noted some minor issues which the shop repaired but bore scope allegedly showed no scoring and the car had a clean over rev report. This spring, 6000 miles and 2 oil/filter changes later, we found non-ferrous metal particles in the oil filter and significantly more in the sump. Bore scope showed scoring in all cylinders, most severe in 1 & 3. Engine most likely requires full rebuild but many parts are backordered. Neither the body/suspension or engine showed any typical signs of abuse or neglect and full service records from 2009 showed regular 6 month oil changes, often at 1000 to 1500 miles or less, and all required service yet here we are... :-(
11-17-2022, 05:58 AM
#33
11-17-2022, 12:03 PM
#34
It is entirely possible to have severe asymptomatic scoring, with clean oil analysis.
I'm starting to think the cold climate cars only is incorrect.
The main problem with continuing to drive with bore scoring, is the particles can destroy other bits of the engine.
I am told a common deficiency of the oil analysis is for "large" but still microscopic particles. If they are big enough then you see them in the filter, is they are very small or dissolved in the oil the analysis will pick them up, inbetween no so much.
Scope it!
I'm starting to think the cold climate cars only is incorrect.
The main problem with continuing to drive with bore scoring, is the particles can destroy other bits of the engine.
I am told a common deficiency of the oil analysis is for "large" but still microscopic particles. If they are big enough then you see them in the filter, is they are very small or dissolved in the oil the analysis will pick them up, inbetween no so much.
Scope it!
11-17-2022, 12:45 PM
#36
Rennlist Member
All this Bore Scoring talk so of course this morning my 997.2 throws a CEL and sounded like it was misfiring.....off to the mechanic. Will report back. Time to put more miles on the 996.
11-17-2022, 01:18 PM
#37
Rennlist Member
11-17-2022, 07:58 PM
#38
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FYI- The reason for the OP is that I was looking at a 29k mi 07 3.6l car. Among other factors, b/c of the extremely low miles I have decided to pass. BTW the car is on BAT.
Sorry if I hit a nerve.
Sorry if I hit a nerve.
11-17-2022, 09:29 PM
#39
Rennlist Member
11-18-2022, 04:19 AM
#40
All this only if you want to keep your car till the end :-)
11-18-2022, 09:31 AM
#41
Rennlist Member
I have a 997 S Launch Car for sale. Great driver example. Just had local dealer perform bore scope (with photos) that showed no signs of wear. PM if interested. Located in Knoxville.
11-18-2022, 09:48 AM
#43
Nordschleife Master
Maybe that explains the factory spraying Cosmoline on the block.
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groovzilla (11-18-2022)
11-18-2022, 11:10 AM
#44
RL Community Team
Rennlist Member
Rennlist Member
997 Launch edition is the best 997.1 to own IMO.
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DHinkle (11-18-2022)
11-18-2022, 11:21 AM
#45
Rennlist Member
Link to FS ad and bore scope photos. https://rennlist.com/forums/market/1325693
If anyone has any questions, feel free to PM me.
If anyone has any questions, feel free to PM me.
Last edited by DHinkle; 11-18-2022 at 11:32 AM.