Bore scoring
Banned
Joined: Dec 2021
Posts: 472
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From: West Palm Beach, FL
Rennlist Member
Joined: Oct 2010
Posts: 7,773
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From: Alabama USA
Also not only is the 3.4 piston pin off-set, but the I know for sure and it documented here that 3.6 996 has the same piston pin off-set..
and don't kid yourself that IMSB failure is not an issue, lol, or borescoring either...hell IMSB even has it's own Facebook page with huge following...lol
Drifting
Joined: Feb 2015
Posts: 3,168
Likes: 890
From: Flyover Country
Occasional puff of smoke on start up, sooty left side tailpipe(I thought what the heck it's a tailpipe after all), Some spitting on garage floor after first start of the day(I figured moisture/carbon from humidity), slow increase in oil consumption, faint ticking from bank two side that became pronounced by year five. The pic is my cylinder six. Cylinder five was just behind it in severity. Cylinder four was starting the same.
My guess is previous owners followed the owners manual on oil changes as GC996 suggests above.
Scoring is NOT hype...
Burning Brakes
Joined: Jan 2006
Posts: 783
Likes: 363
From: Vancouver, BC
What a long winded bunch of BS... Imagine trying to tell a customer who just paid $80k for a new 996 that his noise couldn't be cured, just to live with it...lol
Also not only is the 3.4 piston pin off-set, but the I know for sure and it documented here that 3.6 996 has the same piston pin off-set..
and don't kid yourself that IMSB failure is not an issue, lol, or borescoring either...hell IMSB even has it's own Facebook page with huge following...lol
Also not only is the 3.4 piston pin off-set, but the I know for sure and it documented here that 3.6 996 has the same piston pin off-set..
and don't kid yourself that IMSB failure is not an issue, lol, or borescoring either...hell IMSB even has it's own Facebook page with huge following...lol
Drifting
Joined: Apr 2016
Posts: 2,150
Likes: 943
From: Henderson, NV
This forum actually has a decent amount of "Feel Good" threads now and then, however, the forum is not where most people come to wax poetic. If you're "reading a lot of problems" it's probably a symptom of reading the trouble forums. If you gathered your data by attending PCA meets and talking to current owners you'd probably already own one by now.
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Joined: Oct 2010
Posts: 7,773
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From: Alabama USA
If I'm not mistaken, that article was written by Baz of Hartech fame. They are a well known UK Porsche engine specialist: https://www.hartech.org/ I am not here to argue his reasoning is legit or BS, but knowing their history I would expect his knowledge base to be high. It's possible his post is being taken out of context and erroneously applied to a different issue. Baz is well versed in bore scoring & IMSB issues, they rebuild engines daily for these types of failures. His thoughts are likely directed at ticking complaints where bore scoring has already been eliminated as the cause.
I know who Baz is and just got tired of reading.....and this comment I found at the top set the stage..".If it has a tick after a rebuild it is almost certainly nothing to be concerned about "
Yes right...lol
Last edited by Porschetech3; Sep 28, 2022 at 02:56 PM.
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Banned
Joined: Dec 2021
Posts: 472
Likes: 177
From: West Palm Beach, FL
2005(996)/C4S. Classic symptoms that all started minimal and progressed over five years(2014-2019) to severe especially the ticking.
Occasional puff of smoke on start up, sooty left side tailpipe(I thought what the heck it's a tailpipe after all), Some spitting on garage floor after first start of the day(I figured moisture/carbon from humidity), slow increase in oil consumption, faint ticking from bank two side that became pronounced by year five. The pic is my cylinder six. Cylinder five was just behind it in severity. Cylinder four was starting the same.
My guess is previous owners followed the owners manual on oil changes as GC996 suggests above.
Scoring is NOT hype...
Occasional puff of smoke on start up, sooty left side tailpipe(I thought what the heck it's a tailpipe after all), Some spitting on garage floor after first start of the day(I figured moisture/carbon from humidity), slow increase in oil consumption, faint ticking from bank two side that became pronounced by year five. The pic is my cylinder six. Cylinder five was just behind it in severity. Cylinder four was starting the same.
My guess is previous owners followed the owners manual on oil changes as GC996 suggests above.
Scoring is NOT hype...
so now we’re using social media as credibility.
I don’t know what I’m talking about, but I’m convinced 95% of you don’t either.
Last edited by hkovalcik; Sep 28, 2022 at 03:03 PM.
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Joined: Dec 2019
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From: Illinois
Not certain the difference between symptoms or signs, but the only way to truly know to confirm the signs or symptoms is to scope it.
Banned
Joined: Dec 2021
Posts: 472
Likes: 177
From: West Palm Beach, FL
Rennlist Member
Joined: Dec 2019
Posts: 7,171
Likes: 5,810
From: Illinois
You know the routine, when you are a newbie, you should trust nothing and verify. Because you dont know if the info you are getting is good or bad.
When you have been around the block for 20 years, you already know the issues, what solutions actually make sense, and which ones work.
The challenge is the newbies will question as they should and the seasoned vets will keep giving the same answers. Eventually the newbies get enough information to verify and enough knowledge and experience to apply the info properly.
But to your point, sure, there are alot of folks that really have no idea.
When you have been around the block for 20 years, you already know the issues, what solutions actually make sense, and which ones work.
The challenge is the newbies will question as they should and the seasoned vets will keep giving the same answers. Eventually the newbies get enough information to verify and enough knowledge and experience to apply the info properly.
But to your point, sure, there are alot of folks that really have no idea.
Drifting
Joined: Feb 2015
Posts: 3,168
Likes: 890
From: Flyover Country
Drifting
Joined: Jul 2020
Posts: 2,405
Likes: 2,346
From: Washington DC
Cool - so it seems like it took more or less 5 years, without doing anything different than previous owners, to get to the state you found yourself in where a rebuild was the only way to go. The reason I asked, for all those that have posted photos with fear of bore scoring (even though they're streaks at best) and thinking they need an immediate rebuild, it would appear that as long as you adjust your behavior now, you easily could have more than 5 years of driving you could potentially do while you figure out future steps and save up some coin. By adjusting your behavior I mean proper oil changes / interval and a low temp thermostat at the very least. From there just track metals with a UOA. You can't undo what's been done but you can certainly manage it for quite some time. Often what's been done isn't as bad as the internet may have you believe. Fear has big eyes.
