View Poll Results: Poll: Have you had bore scoring on your 997.1 or 997.2 engine?
Yes, 997.1 (05-08 MY)
143
14.50%
Yes, 997.2 (09-12 MY)
18
1.83%
No, 997.1 (05-08 MY)
524
53.14%
No, 997.2 (09-12 MY)
301
30.53%
Voters: 986. 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)
09-28-2020, 05:19 PM
#331
Bavarian: have you had the car since new and if so how did you maintain it with respect to oil changes, warm ups at less than 4k rpm, many cold starts, hammering for prolonged periods on the Autobahn....
09-28-2020, 05:24 PM
#332
"Not trying to be the bearer of bad news here but my neighbor has been looking at 997.1’s for 2 years now since I got mine and I have him educated. Every single one he has had scoped has had bore scoring. One didn’t even get scoped cause when they dropped the pan there was so much metal in the pan ..."
He must've spent thousands / a lot of coin on all those PPIs if we are making those generalizations. That said though, wouldn't be surprised.
He must've spent thousands / a lot of coin on all those PPIs if we are making those generalizations. That said though, wouldn't be surprised.
09-28-2020, 05:29 PM
#333
Three Wheelin'
"Not trying to be the bearer of bad news here but my neighbor has been looking at 997.1’s for 2 years now since I got mine and I have him educated. Every single one he has had scoped has had bore scoring. One didn’t even get scoped cause when they dropped the pan there was so much metal in the pan ..."
He must've spent thousands / a lot of coin on all those PPIs if we are making those generalizations. That said though, wouldn't be surprised.
He must've spent thousands / a lot of coin on all those PPIs if we are making those generalizations. That said though, wouldn't be surprised.
Last edited by rtl5009; 09-28-2020 at 05:32 PM.
09-28-2020, 06:02 PM
#334
It would be interesting to endoscope 100 997.1 and see how many of them have scratches in the cylinders. Probably almost all of them have some, more or less. Some of them may get symptoms of bore scoring some of them may not...
09-29-2020, 01:21 PM
#336
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"It would be interesting to endoscope 100 997.1 and see how many of them have scratches in the cylinders. Probably almost all of them have some, more or less. Some of them may get symptoms of bore scoring some of them may not."
Andy Bell sounded almost as if he had an acute episode caused by engine modifications and extreme stress on engine that day.
09-29-2020, 01:50 PM
#337
Unfortunately, I believe there is much truth to this:
"It would be interesting to endoscope 100 997.1 and see how many of them have scratches in the cylinders. Probably almost all of them have some, more or less. Some of them may get symptoms of bore scoring some of them may not."
Andy Bell sounded almost as if he had an acute episode caused by engine modifications and extreme stress on engine that day.
"It would be interesting to endoscope 100 997.1 and see how many of them have scratches in the cylinders. Probably almost all of them have some, more or less. Some of them may get symptoms of bore scoring some of them may not."
Andy Bell sounded almost as if he had an acute episode caused by engine modifications and extreme stress on engine that day.
09-29-2020, 02:04 PM
#338
just found your post about your engine being rebulit.
When your cylinder 4 looked exactly like mine and your engine failed but mine is running perfectly that could only mean:
a) my photos are showing just minor scuffs that aren't deep
b) my engine is close to blowing up
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rtl5009 (09-29-2020)
09-29-2020, 04:01 PM
#339
Actually it would be interesting to scope 100 997.1s and 100 997.2s as well for comparo. Or just do 50/50. It could be set up like one of those Botox parties that some of our wives go or used to go to...
10-08-2020, 02:53 PM
#340
Just read through this thread, even thought I'm shopping for a 996. Interesting, educational and sometimes entertaining! My takeaways:
- Most cars either have or will get scoring at some point. Accept the fact. Just a matter of actually looking via borescope to confirm and not speculate.
- There are measures you can take to minimize or delay this
- Just because there is scoring it doesn't mean that the engine will go boom like with a failed IMS so take a deep breath and relax.
- Not all scoring is equal and it's quite possible to have some light marks and experience no typical symptoms and drive for many miles
- Only way to really fix this is a rebuild with Nikkies
- I'm opening a business offering bore scoping services
- Also, shame on Porsche. Curious if this issue will reach the scope of IMS and turn into another lawsuit, especially that even newer cars experience this, including models beyond 911 and Cayman.
- Most cars either have or will get scoring at some point. Accept the fact. Just a matter of actually looking via borescope to confirm and not speculate.
- There are measures you can take to minimize or delay this
- Just because there is scoring it doesn't mean that the engine will go boom like with a failed IMS so take a deep breath and relax.
- Not all scoring is equal and it's quite possible to have some light marks and experience no typical symptoms and drive for many miles
- Only way to really fix this is a rebuild with Nikkies
- I'm opening a business offering bore scoping services
- Also, shame on Porsche. Curious if this issue will reach the scope of IMS and turn into another lawsuit, especially that even newer cars experience this, including models beyond 911 and Cayman.
10-08-2020, 03:32 PM
#341
Three Wheelin'
This thread reminds me of the "me too" movement. My vag@* got scored by someone that didn't treat me right. They didn't change oil for the lubrication, nor warm me up correctly before hammering me......etc....etc....
10-08-2020, 04:13 PM
#342
Rennlist Member
Is this scoring issue only prevalent on Porsches? Why don’t we hear about this on other brands?
10-08-2020, 06:40 PM
#343
There were some links to Subaru's and BMW's dealing with it but to my knowledge it's not as widely reported, to my knowledge. I might just stick my bore cope into my Lexus GS350 and see what's what 
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Carreralicious (10-08-2020)
10-08-2020, 07:27 PM
#344
Three Wheelin'
Oh it’s in every manufacturer
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Lateralgrip (10-08-2020)
11-03-2020, 07:59 PM
#345
Rennlist Member
I have the EVOMS tune on my Gen 2. Andy Bell's post above made me slightly concerned so I emailed Evolution Motorsports to ask them about the knock sensors. Sam Stone the president of the company responded fairly timely. His reply is below:
I'm not burning across Germany on the Autobahn but still... I wanted some peace of mind.
We never disable the knock sensor functionality, or any other OEM component protection strategies on DFI software. We also maintain the systems that reduce power or run the car very rich in response to high coolant/oil/intake/exhaust temperatures, with most platforms like your 997.2 reverting to OEM safety maps in these circumstances. These safety maps are the result of destructive testing at the OEM level to determine how to keep their warranteed engines from melting and failing under extreme conditions, and are usually very effective at this. So if you were to run the car super hard and raise temperatures past safety thresholds, the ECU would revert back to a completely stock mapping designed to protect the engine from damage. The least expensive engine for the cars we tune is like $10,000 on the used market, so employing this policy lets me sleep easy at night knowing we aren't rolling the dice with hundreds of engines.