5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHNew to me 996.2 intro - help diagnose metallic rattle
Leading reported evidence
Check cam deviations
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
Perhaps have someone with an OBD diagnostic tool (PIWIS, Foxwell, Durametric) check cam deviations.
New to me 996.2 intro - help diagnose metallic rattle
Read full discussion summary
Leading evidence: 'Check cam deviations' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check cam deviations' (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
Check for loose heat shields that cover the coils.
New to me 996.2 intro - help diagnose metallic rattle
Replace rpm or doing anything
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
Then start the recording with the engine off and silence for reference, Then start the engine and try to manipulate/change the tone/frequency of the noise by changing RPM OR doing anything that you know of that will make a different in the noise.
New to me 996.2 intro - help diagnose metallic rattle
Replace tone/frequency of the noise by
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
Then start the recording with the engine off and silence for reference, Then start the engine and try to manipulate/change the tone/frequency of the noise by changing RPM OR doing anything that you know of that will make a different in the noise.
New to me 996.2 intro - help diagnose metallic rattle
Replace rpm or doing anything
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
Then start the recording with the engine off and silence for reference, Then start the engine and try to manipulate/change the tone/frequency of the noise by changing RPM OR doing anything that you know of that will make a different in the noise.
New to me 996.2 intro - help diagnose metallic rattle
Replace tone/frequency of the noise by
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
Then start the recording with the engine off and silence for reference, Then start the engine and try to manipulate/change the tone/frequency of the noise by changing RPM OR doing anything that you know of that will make a different in the noise.
New to me 996.2 intro - help diagnose metallic rattle
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.
5 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: 20261026T194705Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all,
I am a long time porsche owner (1976 911 Backdate) who recently picked up a nice 996.2 CS with relatively low mileage (39k). I haven't had any issues with it since purchasing it in late March. IMS has been retrofitted and car is in great shape and properly maintained.... I have recently noticed a repetive metallic rattle/noise that I can hear with the windows down at idle.... I am not sure if it is only when the car is at idle due to the possibility of the soud being drowned out by driving/engine noise, but it is clear as day at idle. I opened the engine bay and reached to all metal clamps or objects to wiggle them to see if the noise was coming from anything possible loose but nothing....
Here are some intro pics of the car - and a link to a video i took of the sound - much appreciated in advance...
video link:
https://drive.google.com/file/d/1NKt...ew?usp=sharing
I don't have personal experience with this problem, but people on this Forum have often suggested loose parts inside catalytic converters or mufflers cause such a sound.
If you give it a slight rev while parked in neutral does the sound go away? If yes it could be chain rattle. Perhaps have someone with an OBD diagnostic tool (PIWIS, Foxwell, Durametric) check cam deviations. If way off your tensioners could be worn. Does it rattle hot or cold? Do you have any excess soot in one of the tail pipes?
Check for loose heat shields that cover the coils. Take a rubber mallet and tap the mufflers and cats. Loose material inside can create a rattle sound.
I'm sure it wasn't so bad in person, but that is the worst audio I have ever heard while trying to diagnose a noise. The wind noise and background noise overshadow everything.
Try moving to a quite location, out of the wind, preferable indoors in a quite garage. Then start the recording with the engine off and silence for reference, Then start the engine and try to manipulate/change the tone/frequency of the noise by changing RPM OR doing anything that you know of that will make a different in the noise.
All this info can be used to determine the source of the noise. ( more tricks may also be necessary).
This is a source reference. Confirm exact model applicability in the original material.
