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Missing engine number

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Original source
30 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMissing engine number

Leading reported evidence

Check engine

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 · Original poster

Jut checked the engine.

Missing engine number
Read full discussion summary

Leading evidence: 'Check engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'original engine' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check engine' (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.

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1 matching discussions · 30 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use emery paper

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 · Original poster

I wire brushed and used emery paper.

Missing engine number

original engine

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 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

Very likely an original engine.

Missing engine number

Check engine number today and had a big surprise

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 · Original poster

I tried to check my engine number today and had a big surprise.

Missing engine number

Check now

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 · Original poster

At least I have a couple of additional things to check now.

Missing engine number
Frequently discussed actions (7)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check engine

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster

Jut checked the engine.

Missing engine number

Check engine number today and had a big surprise

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 · Original poster

I tried to check my engine number today and had a big surprise.

Missing engine number

Check now

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 · Original poster

At least I have a couple of additional things to check now.

Missing engine number

Run vin # decorder

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

"When I asked Ric Knab ([email removed]) of Suncoast Porsche, Sarasota Florida to run a VIN # decorder on my 2006 Carrera he came back with all the options listed including the brand of tires.

Missing engine number

Use discretion

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

Use discretion with the acid.

Missing engine number

Use emery paper

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster

I wire brushed and used emery paper.

Missing engine number

Use some cleaner

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

Maybe rub harder or use some cleaner.

Missing engine number
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

original engine

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
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

Very likely an original engine.

Missing engine number
Coverage and how to read this overview

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.

30 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: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Or it appears that way. I tried to check my engine number today and had a big surprise. Couldn't see or feel any number. It's a left hand drive 2003 996 C2. 3.6L I rubbed what I thought was the engine number area and there is no number. Took a photo as I thought I was going mad. This is left hand side of the engine looking from the back. Confused, maybe I need to try harder with the rag. Any ideas/thoughts? Thanks image-407772892.jpg

POST 2Original post

For the 3.6 L https://rennlist.com/forums/997-foru...ber-stamp.html Maybe rub harder or use some cleaner.

POST 3Original post

Quotes source post: 10772105

Very common when looking for the engine number its just faint and hard to see unless really clean.

POST 4 / ORIGINAL POSTEROriginal post

Ok. Brass wire brush on the list. Wonder why surprise I may find.

POST 5Original post

Wire brush will do the trick. Look for an AT in the serial as it designates a Porsche reman engine.

POST 6 / ORIGINAL POSTEROriginal post

I wire brushed and used emery paper. I don't think anymore rubbing will reveal any numbers. Any ideas? image-79507976.jpg

POST 7Original post

A VIN decoder will tell you what engine number came with the car originally. Hard to tell from the picture but it looks like there is the start of a number on there. I wouldn't do anymore as it looks almost worn away. Perhaps taking a piece of paper and lead pencil and making a rubbing of that area may reveal a number.

POST 8Original post

You have entered the world of forensics. Acid etch it. Use discretion with the acid. Or you could go for a drive instead.

POST 9Original post

It does seem rather odd but the cynic in me wonders if someone purposely tried to sand it down for one reason or another...

POST 10Original post

LOL! Kind of like removing the serial number from a gun.....I was just trying to help out the OP, but agree with Ditto...go for a drive instead. What we get ourselves into....sigh

POST 11Original post

Tokyopav, didn't you say that you car was a grey market import? Did it starts its life in the Beverly Hills Porsche dealer? Did Kip Raines take it through the front door?

POST 12 / ORIGINAL POSTEROriginal post

I didn't say grey import. Actually it was a legit import. Sold and serviced by porsche Japan. If you walk around the porsche showroom in Tokyo you will see all are left hand drive in a right hand drive market. After plenty of google research it seems the numbers are lightly engraved not heavily stamped. Maybe the Nebraska became victims to previous reveal techniques. I was only interested in finding out if its the original engine or a replacement. Ill try the pencil if nothing shows then ill give up. Cheers everyone. Picture to end the thread. Taken at Hakone Skyline last weekend. image-3265324352.jpg

POST 13 / ORIGINAL POSTEROriginal post

p.s. no porsche Japan won't tell me anything about the car. They are pretending they don't keep the data. Privacy protection is a big thing here in japan so they don't risk anything.

POST 14Original post

I was on the same boat as you are Tokyo when I bought my 2000 c2. Was not sure if I had the replacement engine, paperwork from the dealership wasn't clear about the engine replacement. So I did look for the tell tale sign of a remanufactured engine. My engine oil cap seems like it was made in 2005 and the power steering cap says its a 997 part. Of course I later found out that my engine was indeed replaced as indicated by the prefix "AT" on the engine serial number. Hope this helps.

POST 15Original post

There is a top of a P on the left side but the rest of the numbers looks like it was sand blasted at some point. Someone was in there and did this on purpose. If you keep digging, might not like the answer at the end. I would stop and pretend I never looked in the first place.

POST 16 / ORIGINAL POSTEROriginal post

Quotes source post: 10786685

Agree.

POST 17Original post

Look at the intake manifold and make sure you didn't luck out with a x51 option or upgrade.

POST 18 / ORIGINAL POSTEROriginal post

Quotes source post: 10786894

Need to work out what the x51 intake looks like I guess! Looking at the option codes it's a no but no discernible engine number you never know. At least I have a couple of additional things to check now.

POST 19Original post

Quotes source post: 10787015

The x51 intake manifold will be flatter and wider and will be made from all aluminum unlike the black plastic runners of the non-x51 manifold. Just look past your throttlebody where it's hooked to to see if you can see a more oval flatter aluminum plenum housing and silver intake runners(vs black).

POST 20Original post

Quotes source post: 10785576

If it matters at all you might want to edit one of your posts from your intro thread. You definitely said it was grey import in that thread but maybe you missed the word "not" in your sentence by mistake. I'm guessing so based on what you said in this post and thread about the prevalence of left hand drive Porsches in Japan.

POST 21 / ORIGINAL POSTEROriginal post

Quotes source post: 10787362

Haha! You're right. Missed the "not". Jut checked the engine. Definitely black plastic. image-4243477585.jpg

POST 22Original post

Post #3 has an engine # decoder https://rennlist.com/forums/996-foru...-location.html Number should look something like this. Without the "AT" which factory = remanufactured. http://www.101projects.com/Boxster/P...ges/Pic700.jpg

POST 23 / ORIGINAL POSTEROriginal post

Tried again tonight with some tricky side lighting. Rubbed pencil in and rubbed off. Not sure it helped but seems I have an engine number. Can't read it properly but it's there. image-1335137519.jpg

POST 24Original post

It looks like you got original engine from 2003.

POST 25Original post

Looks like M96__0366312993. I can't tell if that is a slash or possibly a 7 after M96.

POST 26 / ORIGINAL POSTEROriginal post

Yes I've been looking hard. Seems to be original.

POST 27Original post

Probably is M96/0366312993 See this forum post https://rennlist.com/forums/997-foru...ber-stamp.html Maybe you can try this to confirm: "When I asked Ric Knab ([email removed]) of Suncoast Porsche, Sarasota Florida to run a VIN # decorder on my 2006 Carrera he came back with all the options listed including the brand of tires. It also included Engine Type # M9605 , the Engine serial # 69606039, Gearbox type G9701 & the Transmission serial # 1030894. It will surprise you with the information that he provides."

POST 29Original post

M96/03663 = 2003 M96/03 engine 3.6 liter with 320 HP. Very likely an original engine.

This is a source reference. Confirm exact model applicability in the original material.