16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHEngine #
Leading reported evidence
Use starting
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
'V' is 1997, 'W' is 1998, 'X' is 1999, 'Y' is 2000, then digits are used starting with '1' which is 2001.
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
Unless it has been fitted with a direct oil feed IMS Solution, the part is a possible wear item and should be addressed when you replace the clutch, no matter what.
Leading evidence: 'Use starting' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace clutch, no matter what' (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 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
Unless it has been fitted with a direct oil feed IMS Solution, the part is a possible wear item and should be addressed when you replace the clutch, no matter what.
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
If the whole engine has already been replaced though, why worry about the bearing?
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace clutch, no matter what
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
Unless it has been fitted with a direct oil feed IMS Solution, the part is a possible wear item and should be addressed when you replace the clutch, no matter what.
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.
16 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: 20261027T140027Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
http://www.porscheclubgb.org/clientf...sion_codes.pdf
Looks like it is a 3.4 from a 99 car that was remanufactured. AT is the indicator there, I believe.
Really.. I wonder why a 99 would have this motor in the first place. Maybe a warranty replacement from Porsche due to an IMS or whatever issue? If a remanufactured, should there be an IMS concern as well? Or, was there an updated 3.4 that doesn't have a serviceable IMS?
I would guess that it is a factory replacement under warranty for any possible number of reasons.
Is the engine out of the car?
Unless it has been fitted with a direct oil feed IMS Solution, the part is a possible wear item and should be addressed when you replace the clutch, no matter what.
Read the IMS sticky thread if that is where this is headed.
I also have AT on my engine serial number and it means a remanufactured engine from Porsche. As I did not any documentation I don't know when the engine was installed. I know it is a 2000 motor . Probably has the double row bearing. Just curious to know if there is any data on the reliability of the remanufactured engine versus the original. It is important to have documentation as it avoids maintenance questions and doing maintenance that was not necessary.I contacted the dealer in the maintenance book and could not get an answer as to when the work was done.There data was not up to date.It is nice to know that my engine has fewer miles than what the odometer tells me but still a lot of ??????
Bubrubb,
It's in my car. I'm being told that my IMS bearing isn't serviceable and that it doesn't match up with the LN Engineering version. Upon doing some additional research, I was told that the motor could possibly be a warrantee replacement but was upgraded to an 05/06 motor. This is why I am asking if anyone could run this number. Why wouldn't the IMS bearing match up with the one that's currently in the car?
I am really surprise that you were told it was not serviceable. The X in the serial number means a 99 engine. I have a Y which means a 00 engine. I don't see how a 99 engine was modified to a 04 or 05 and the bearing unserviceable. I would get another opinion.
There is another thread on this, without much resolution other than Jake Raby chiming in that it needs visual inspection.
https://rennlist.com/forums/996-foru...iceable-2.html
That is about all the help I can offer at this point.
It's a '99 3.4 engine according to your serial #, and if that's the case, the bearing would be serviceable (ie: replaceable). AFAIK, starting in mid-'05 engines, the bearing could not be removed without disassembling the engine. If the whole engine has already been replaced though, why worry about the bearing?
There was a thread awhile back on engine serial # that helps explain what you have
https://rennlist.com/forums/996-foru...al-number.html
M96/03 means engine type
AT means remanufactured or austauschmotor
Next three are year it was remanufactured which may not match the year it was installed.
S means x51
66w is 1998
66x is 1999
66y is 2000
661-665 is 2001 - 2005
Last numbers are serial code.
The first '6' is the # of cylinders. The 2nd '6' means it is a normally aspirated engine (except for the Carrera 4 model engine in 1999). This '6' could be could be a '3' (GT3 engine), or '4' (turbo-charged 3.6l engine), or '8' (Carrera 4 N/A engine).
The 'Y' is the year of engine manufacture. 'V' is 1997, 'W' is 1998, 'X' is 1999, 'Y' is 2000, then digits are used starting with '1' which is 2001.
My info is the remanufactured engines retain their original serial numbers.
M9601AT66X66836
M96 01 engine type
AT - reman
66X - 1999
6 cylinder/normally aspirated
So I would say you have a reman 99 3.4L engine, more than likely with a double row IMSB (very low failure rate). Live and let live!!
Billyboy,
Since this is very first 911 experience, I just want to be safe and precautionary. I'm actually not worried about the IMS since it's a remanufactured motor. That's actually a good thing and one less thing for me to worry about. Thanks for the insight...
M96/01 means, 1st M96 engine design for 996. AT is stamped on when it is remanufactured. Lastest greatest updated parts are installed at time of rebuilding.
This is a source reference. Confirm exact model applicability in the original material.
