15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 engine date code location
Leading reported evidence
Replace 'x' designation
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I believe Porsche has replaced the 'X' designation with 'AT', for instance the 2005 built reman engine sitting in my garage has the following serial number M96/03AT66565160.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
Leading evidence: 'Replace 'x' designation' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'newer than i thought' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check anytime soon' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
Be nice if the engine turned out to be newer than I thought!
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
Replace with a remanufactured engine, there will be a '
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
It is my understanding that if the engine has been replaced with a remanufactured engine, there will be a '
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check anytime soon
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I believe Porsche has replaced the 'X' designation with 'AT', for instance the 2005 built reman engine sitting in my garage has the following serial number M96/03AT66565160.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Just picked up a '99 C2, and can't find the history from 0-45K miles (has 65K now). I assume it's the original engine, but would like to know for sure. Searched the archives, but could not find anything on engine stamp/date codes. Surely there is one somewhere and you can tell the year of manufacture. Anyone know?
There is a SN on the bottom driver side stamped to the right of the 1st header tube (furthest one back away from the bumper). Don't know how to decipher it or what it will tell you. There is no VIN on the engine itself. If the car you are buying has a replacement engine; many would see that as a positive thing not a negative one.
Here is some info from the PET. Maybe this will help. So your engine number would begin with
66X
followed by a 5 digit serial number.
It is my understanding that if the engine has been replaced with a remanufactured engine, there will be a '
AT
' at the end of the serial number.
Edited: I had originally had 'X' as the remanufactured engine designation, but it is in fact 'AT'
You'd be better off with a remanufactured engine
But I'm not sure the X tells all because my engine was replaced by the Porsche dealer under warranty at 13K miles, but I don't believe I saw any special number/letter designations, but then I don't fully recall and likely will be too lazy to check anytime soon.
I believe Porsche has replaced the 'X' designation with 'AT', for instance the 2005 built reman engine sitting in my garage has the following serial number M96/03AT66565160.
Do a search over at Renntech, you will find more information on this as well as several pictures of where to look for the serial number.
Todd
No "X" or "AT", it's a "W" code...1998 vintage. Well, it's made it this long......but can't help but feel I've got a ticking time bomb back there! Sure is magnificent, though!
Thanks again- solved!
Tim, do you notice anything missing in this thread.
Hold on, here is a clue:
Clue #2: the missing part has to do with this response:
Clue #3: a missing #@%$#!
Clue #4: I wonder what a '99 C2 looks like
-td
Hint: Looks just like the rear pic of yours, but the rear spoiler appears to have come from "south of the border".......
It's squeezed in the garage right now, would make an ugly !@#$#@!
Gotta go to Chicago tomorrow for the weekend, but will get the !@#!$! up next week!
I LOVE it! (it's my first P)
And as Big Gay Al would say : "Thanks for asking!"
TD, actually he already sounded a little nervous about having a '99 engine in his car that might grenade any minute, so I didn't want to scare him away.
By the sound of it, he must have been been lurking for a while, 'cuz he said he would post teh !@#$%^&* pics next week!
This same thing came up in another thread today and another Rennlister wanted to know if I was 1) sick, or 2) on drugs, or 3) had just gotten laid (you can rule out #3, at least until my wife goes out of town
) because I was too easy on a "newbie." Man, I am trying to be a "kinder, gentler" Rennlister and you guys won't let me.
Sorry to resurrect this old thread, but I am curious as I just found out that my car has a new engine in it. The serial is m96/0318AT66568904. Its an 03 C4S w/41k on it. The documentation from the previous owner didn't have any info on the new engine. From above, I understand it was the most recent "revision" of the 996 motor for 2005, but does the end of the serial number offer any insight as to when it might have been installed?
No. The serial number only tells you a bit about the engine, and the year it was built. Earlier posts cover this so I won't repeat the info here.
My info is the serial number is a sequential number applied when the engine built not when it was installed in a car.
If you want to know when the engine was installed if you know the dealer where the work was done a call to the dealer with the VIN of the car should have this info in your hands.
My experience is if you approach a dealership with the right frame of mind it will share with you when the car was serviced. You should avoid asking for any details about the owner. All you want to know about is the car.
If you don't know the dealership but know the area the car spent time in -- based on perhaps a CarFax report -- you can just start calling Porsche dealers in the area until you hit the one that serviced the car.
If the engine installed by an indy...well, I have no experience tracking down any servicing done by indy shops.
Sincerely,
Macster.
This is a source reference. Confirm exact model applicability in the original material.
