Notices
996 Forum 1999-2005
Sponsored by:
View Poll Results: Bore scoring
Have/Had it
33
23.08%
Don’t have it
65
45.45%
Don’t know don’t wanna know
45
31.47%
Voters: 143. You may not vote on this poll

Bore scoring survey

Thread Tools
 
Search this Thread
 
Old Jun 10, 2025 | 09:56 AM
  #1  
kincedn9's Avatar
kincedn9
Thread Starter
Rennlist Member
10 Year Member
 
Joined: Aug 2011
Posts: 117
Likes: 82
From: South Jersey
Default Bore scoring survey

The other hot issue besides IMS. Curious what the sampling is.

Have it
Don’t have it
dont know don’t care
Reply
Old Jun 10, 2025 | 02:41 PM
  #2  
steam_mill's Avatar
steam_mill
Burning Brakes
20 Year Member
 
Joined: Aug 2005
Posts: 1,147
Likes: 404
From: Greater Toronto Area
Default

This should be a interesting survey. I had my car scoped at part of PPI in 2018 at 70K km. Now have 80K km. I was fine at 70K, I have no plans in checking as until it becomes symptomatic, I try not to worry about it. I have done all the usual stuff to prevent it. I hope it doesn't happen but not much can be done to avoid it IMHO beside letting it warm up, quality oil with often oil changes. And I pray. Honestly, I love my car but bore scoring is by biggest worry and it does somewhat take away from the ownership experience.
Reply
Old Jun 10, 2025 | 03:43 PM
  #3  
binaryaudax's Avatar
binaryaudax
Rennlist Member
 
Joined: Dec 2022
Posts: 367
Likes: 332
From: Laguna Beach, CA
Default

Shouldn't "Don't Have It" be "Don't Have It Yet"?
Reply
Old Jun 10, 2025 | 08:47 PM
  #4  
e30rapidic's Avatar
e30rapidic
Rennlist Member
5 Year Member
 
Joined: Mar 2017
Posts: 1,077
Likes: 770
From: Raleigh, North Carolina
Default

bought my car as a project, knowing it had bore score. Now a nice 4.0






Reply
Old Jun 11, 2025 | 12:52 AM
  #5  
TexSquirrel's Avatar
TexSquirrel
RL Community Team
Rennlist Member
5 Year Member
 
Joined: Aug 2016
Posts: 5,841
Likes: 2,978
From: Richmond, TX
Default

Borescoped mine in November 2018 and found no evidence of borescoring.
Ran DT40 and followed Jake’s advice for keeping borescoring at bay.
When my engine was torn down in October 2022 for the elective FSI 4.0 build, found that my piston coating was worn away on some pistons.
So I had the beginnings of borescoring, but my bores looked fine.
According to Jake, he finds that most if not all have started.

Reply
Old Jun 11, 2025 | 04:41 AM
  #6  
Porschetech3's Avatar
Porschetech3
Rennlist Member
15 Year Member
 
Joined: Oct 2010
Posts: 7,708
Likes: 6,989
From: Alabama USA
Default

Since borescoring is mostly on Bank 2 and especially on cylinder #6, I have to believe that heat and friction are the main cause....

I would think that a thicker oil than a 40 weight with Moly and/or Ceratech and /or Nano Copper particles will cure it on the ones most susceptible like those with FerroPrint piston coatings..
Reply
Old Jun 11, 2025 | 10:24 AM
  #7  
blacksquid's Avatar
blacksquid
Rennlist Member
10 Year Member
 
Joined: Feb 2015
Posts: 300
Likes: 136
From: Alexandria, VA
Default

Mine was discovered during the IMS Solution qualifying stage. Decided to have FSI Stage 1 rebuild to take care of all known issues with the M96 and very happy that I did.
Reply
Old Jun 11, 2025 | 03:24 PM
  #8  
GC996's Avatar
GC996
Rennlist Member
 
Joined: Dec 2019
Posts: 7,126
Likes: 5,722
From: Illinois
Default

Nice job with organizing the thread. Good to get some stats. They should probably put this next to the IMS thread along with a water pump thread.
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

2026 Porsche 911 Club Coupe is Spectacular, And Everything Wrong with the Porsche Market

 Joe Kucinski
story-1

Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million

 Verdad Gallardo
story-2

9 Vehicles Porsche Helped Engineer that Aren't Porsches

 Verdad Gallardo
story-3

9 Features and Characteristics That Only Porsche People Understand

 Verdad Gallardo
story-4

I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

 Joe Kucinski
story-5

10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

 Verdad Gallardo
story-6

Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

 Joe Kucinski
story-7

This Builder Is Turning Heads With Its Slantnose 911 Creation

 Verdad Gallardo
story-8

Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

 Verdad Gallardo
story-9

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
Old Jun 11, 2025 | 06:07 PM
  #9  
kincedn9's Avatar
kincedn9
Thread Starter
Rennlist Member
10 Year Member
 
Joined: Aug 2011
Posts: 117
Likes: 82
From: South Jersey
Default

I’m definitely in the don’t know don’t wanna know club. I have no symptoms as of yet. No oil consumption, no smoke on start. Runs strong. I avoid winter time driving for what it’s worth. Religious about annual or bi annual oil changes. I have a youthful engine by miles ( under 40k) but the age it’s getting up there. I don’t wanna spoil a good thing.

at this point an engine rebuild is cheaper than buying a new car. So gonna roll the dice til it seems like it’s reasonable to look and then act accordingly.

figure the 996 is such a stout understood car at this point. cheaper than the ridiculous priced 992 and it’s fun as hell. At 20 plus years old. There’s nothing not known about em.

party on! And here’s to keeping your bumper on for servicing and oil changes in your driveway if you choose to.
Old Jun 13, 2025 | 11:46 AM
  #10  
GC996's Avatar
GC996
Rennlist Member
 
Joined: Dec 2019
Posts: 7,126
Likes: 5,722
From: Illinois
Default

Lets keep this thread and poll going!
Reply
Old Jun 13, 2025 | 11:54 AM
  #11  
Porschetech3's Avatar
Porschetech3
Rennlist Member
15 Year Member
 
Joined: Oct 2010
Posts: 7,708
Likes: 6,989
From: Alabama USA
Default

Do a Poll with AOS...lol....I'm betting 0% still original......
Reply
Old Jun 13, 2025 | 12:11 PM
  #12  
GC996's Avatar
GC996
Rennlist Member
 
Joined: Dec 2019
Posts: 7,126
Likes: 5,722
From: Illinois
Default

Originally Posted by Porschetech3
Do a Poll with AOS...lol....I'm betting 0% still original......
For sure. Both AoS and water pump should be done. Then we will have some rough stats on the major failure points.
Reply
Old Jun 13, 2025 | 01:16 PM
  #13  
steam_mill's Avatar
steam_mill
Burning Brakes
20 Year Member
 
Joined: Aug 2005
Posts: 1,147
Likes: 404
From: Greater Toronto Area
Default

Originally Posted by TexSquirrel
Borescoped mine in November 2018 and found no evidence of borescoring.
Ran DT40 and followed Jake’s advice for keeping borescoring at bay.
When my engine was torn down in October 2022 for the elective FSI 4.0 build, found that my piston coating was worn away on some pistons.
So I had the beginnings of borescoring, but my bores looked fine.
According to Jake, he finds that most if not all have started.
Would be curious as to mileage in 2018 and then in 2022....
Reply
Old Jun 15, 2025 | 07:39 PM
  #14  
TexSquirrel's Avatar
TexSquirrel
RL Community Team
Rennlist Member
5 Year Member
 
Joined: Aug 2016
Posts: 5,841
Likes: 2,978
From: Richmond, TX
Default

Originally Posted by steam_mill
Would be curious as to mileage in 2018 and then in 2022....
11/2018: 64704 miles
12/2022: 85561 miles
Reply
Old Jun 16, 2025 | 09:01 AM
  #15  
Porschetech3's Avatar
Porschetech3
Rennlist Member
15 Year Member
 
Joined: Oct 2010
Posts: 7,708
Likes: 6,989
From: Alabama USA
Default

Originally Posted by TexSquirrel
11/2018: 64704 miles
12/2022: 85561 miles
@TexSquirrel was your Ferroprint coating "flaking off" or was it "worn-away" ?

Flaking-off would be from Adhesion failure of the coating to Piston skirt ..

Where Worn-away would be from high Friction and/or lack of Lubrication of the piston skirt


Reply



All times are GMT -3. The time now is 12:32 AM.

story-0
2026 Porsche 911 Club Coupe is Spectacular, And Everything Wrong with the Porsche Market

Slideshow: The 2026 Porsche 911 Club Coupe is being resold $150K above sticker and that is a real problem.

By Joe Kucinski | 2026-05-21 11:52:54


VIEW MORE
story-1
Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million

Slideshow: Talos Vehicles has transformed the Porsche 911 GT3 RS into a carbon-bodied, race-inspired machine that costs well over $1 million before the donor car is even included.

By Verdad Gallardo | 2026-05-19 13:39:04


VIEW MORE
story-2
9 Vehicles Porsche Helped Engineer that Aren't Porsches

Slideshow: Long before engineering consulting became trendy, Porsche was quietly helping other automakers build everything from supercars to economy hatchbacks.

By Verdad Gallardo | 2026-05-15 12:44:44


VIEW MORE
story-3
9 Features and Characteristics That Only Porsche People Understand

Slideshow: Some brands build cars. Porsche builds traditions, obsessions, and a few habits that stopped making sense decades ago but somehow became part of the charm.

By Verdad Gallardo | 2026-05-13 18:46:13


VIEW MORE
story-4
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

Slideshow: Six years and 500 Rennlist articles later, these are the biggest changes at Porsche.

By Joe Kucinski | 2026-05-11 09:52:55


VIEW MORE
story-5
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

Slideshow: Some Porsches exist for very specific reasons-others feel like they were built just to see if anyone would notice.

By Verdad Gallardo | 2026-05-06 18:00:32


VIEW MORE
story-6
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

Slideshow: Choosing between the 911 GT3 S/C and 718 Spyder RS in 10 key categories to determine one surprising winner.

By Joe Kucinski | 2026-05-05 12:51:46


VIEW MORE
story-7
This Builder Is Turning Heads With Its Slantnose 911 Creation

Slideshow: A small Polish tuner has reimagined the Porsche 911 Slantnose for the modern era, blending 1980s nostalgia with widebody tuning culture and serious performance upgrades.

By Verdad Gallardo | 2026-05-01 10:49:43


VIEW MORE
story-8
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

Slideshow: Porsche has created a Japan-only 911 GT3 Artisan Edition that blends track-ready hardware with design cues inspired by traditional Japanese craftsmanship.

By Verdad Gallardo | 2026-04-28 19:37:40


VIEW MORE
story-9
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE