Dial 911 - Page 244

Nick M3 · 01-14-2022, 12:38 PM

Quote:

Originally Posted by JST

No, but that's part of the reason that the .2 non-Turbos command such a premium, because it feels like they don't have the same issues that afflict the .1s or the Turbos.

That said, I haven't really paid attention to which cars are impacted by bore scoring. Not sure if that hits the .2s, as well?

Yeah... A friend of mine just bailed on a 997.1 C2S due to bore scoring that turned up in PPI. I'd been generally kind of negative on that car (kind of high mileage for a non-DIYer), but that was too much.

SCA · 01-14-2022, 01:23 PM

Ouch… that stinks for the current owner, but certainly a blessing for your friend. Did they even make it as far to get the over rev report? Just curious.

My car has higher miles than I would like, but it is considered to be low by the national average or even the regional average (12K). It is somewhat satisfying to realize that it was never really a garage queen as it was driven frequently while also being properly maintained via its former multiple Porsche owner/enthusiast.

Nick M3 · 01-14-2022, 01:28 PM

Quote:

Originally Posted by SCA

Ouch… that stinks for the current owner, but certainly a blessing for your friend. Did they even make it as far to get the over rev report? Just curious.

My car has higher miles than I would like, but it is considered to be low by the national average or even the regional average (12K). It is somewhat satisfying to realize that it was never really a garage queen as it was driven frequently while also being properly maintained via its former multiple Porsche owner/enthusiast.

IIRC, the overrev report was pretty clean. He made it far enough to spring fro borescoping the cylinders, so pretty far. That was the last item.

JST · 01-14-2022, 01:36 PM

Quote:

Originally Posted by Nick M3

Yeah... A friend of mine just bailed on a 997.1 C2S due to bore scoring that turned up in PPI. I'd been generally kind of negative on that car (kind of high mileage for a non-DIYer), but that was too much.

That sucks. I find the bore scoring and IMS issues annoying partly because so much of the intel on them comes from Jake Raby, whom...well, it's not that I don't trust him, exactly, but he's definitely found a market niche and I think his incentives are not entirely aligned with mine, as an owner.

lemming · 01-14-2022, 01:38 PM

Also seems like anecdotal camshaft issues on 997.1 Turbo motors.

Maybe it does not afflict the 997.2 Turbo’s.

Similarly, the DFI 997.2 engines seem less problematic mostly. Other than the added complexity of high pressure fuel injection.

The rear spoiler is of the same design of the 996TT so it’s pricey to keep up with. And the clutch while being a wear item is still $5000.

So, in general, it’s a lot more upkeep compared to NA powered 997s.

SCA · 01-14-2022, 01:43 PM

Placing this here for future reference. 911 977 Engines & Bore Scoring - My Experience and Knowledge So Far. https://youtu.be/SGggQ-ooJwA *From January 2021.

lemming · 01-14-2022, 03:44 PM

Quote:

Originally Posted by SCA

Placing this here for future reference. 911 977 Engines & Bore Scoring - My Experience and Knowledge So Far. https://youtu.be/SGggQ-ooJwA *From January 2021.

12,000 pounds to rebuild the engine

And to be honest, i thought this was some less than anecdotal thing. This sounds more like Thanos —Inevitable. Due to cylinder head design for hot spots.

I guess this could happen to any engine? But it sure seems hyped up on M96 engines (997.1s).

Now I know. Look at the left side exhaust for asymmetric oil burning compared to the right side exhaust. Fun video. Thanks.

lemming · 01-14-2022, 03:47 PM

Quote:

Originally Posted by lemming

12,000 pounds to rebuild the engine

And to be honest, i thought this was some less than anecdotal thing. This sounds more like Thanos —Inevitable. Due to cylinder head design for hot spots.

I guess this could happen to any engine? But it sure seems hyped up on M96 engines (997.1s).

Now I know. Look at the left side exhaust for asymmetric oil burning compared to the right side exhaust. Fun video. Thanks.

Now I think I understand why my 996 C4S burnt oil.

Nick M3 · 01-14-2022, 03:55 PM

Quote:

Originally Posted by lemming

12,000 pounds to rebuild the engine

And to be honest, i thought this was some less than anecdotal thing. This sounds more like Thanos —Inevitable. Due to cylinder head design for hot spots.

I guess this could happen to any engine? But it sure seems hyped up on M96 engines (997.1s).

Now I know. Look at the left side exhaust for asymmetric oil burning compared to the right side exhaust. Fun video. Thanks.

Apparently it's much bigger issue on the 3.8 vs,. the 3.6 in the .1s. According to the Porsche tech I bought my spare S54 from, anyway.

lemming · 01-14-2022, 03:58 PM

Quote:

Originally Posted by Nick M3

Apparently it's much bigger issue on the 3.8 vs,. the 3.6 in the .1s. According to the Porsche tech I bought my spare S54 from, anyway.

Is this common across all engine designs?

Or is this endemic to the flat six?

And is there a sidedness? So is the scoring on the side of the cylinder wall that is on the bottom of the cylinder?

01-14-2022, 01:38 PM	#2435
lemming Western Anomaly Join Date: Oct 2003 Carmudgeonly Ride: White Orca Posts: 16,644	Also seems like anecdotal camshaft issues on 997.1 Turbo motors. Maybe it does not afflict the 997.2 Turbo’s. Similarly, the DFI 997.2 engines seem less problematic mostly. Other than the added complexity of high pressure fuel injection. The rear spoiler is of the same design of the 996TT so it’s pricey to keep up with. And the clutch while being a wear item is still $5000. So, in general, it’s a lot more upkeep compared to NA powered 997s. __________________

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01-14-2022, 01:23 PM	#2432
SCA Jaded Join Date: Oct 2003 Posts: 9,097	Ouch… that stinks for the current owner, but certainly a blessing for your friend. Did they even make it as far to get the over rev report? Just curious. My car has higher miles than I would like, but it is considered to be low by the national average or even the regional average (12K). It is somewhat satisfying to realize that it was never really a garage queen as it was driven frequently while also being properly maintained via its former multiple Porsche owner/enthusiast.

01-14-2022, 01:43 PM	#2436
SCA Jaded Join Date: Oct 2003 Posts: 9,097	Placing this here for future reference. 911 977 Engines & Bore Scoring - My Experience and Knowledge So Far. https://youtu.be/SGggQ-ooJwA *From January 2021.