8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2003 C4S, low miles and noisy exhaust?
Leading reported evidence
Use mobil 1 in this oil
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.
Leading evidence: 'Use mobil 1 in this oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'non-issue as the car is 15 years old' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check exhaust over' (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 suspect a cause
1
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Suspected cause · Original poster
Probably a non-issue as the car is 15 years old.....
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
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Suggestion · Original poster
Spent a little time checking the exhaust over yesterday.
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.
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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: 20261026T061123Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello, team.
I have a great car. ‘03 C4S that I bought with < 9,000 original miles.
I am the third owner and received all documentation with the car.
Car is equipped with PSE
PSE works as it should. Button is functional and causes the “wonderful” sound to change to quiet as it should.
I went through a typical “new to me” oil change and analysis of the old oil through Blackstone. No issues - comments about how clean the oil is. Did the air filter and accessory belt at the same time. Also added a magnetic drain screw. Used Mobil 1 in this oil change.
Car was updated with the LN engineering IMS bearing during previous owner’s tenure.
Previous owner kept car pristine and put very few miles on during his ownership (2007 to 2017). Sounds like it’s not been driven in the rain.
Anyway -
The car sounds noisy: Seems to be a random “ball bearings in a tin can” noise coming from mufflers. Seems to be increasing with amount I drive it.
This sound is not a timing chain slap type of a sound.
Good oil pressure.
Good performance.
No CEL (and the lights are all active when turning on ignition switch).
Does the 996 (and maybe specifically the PSE option) typically exhibit a baffle coming loose in the muffler? Is this something that any of you guys and gals may have experienced in the past?
I’d hate to go down some goofy (example - cam chain tensioner) rabbit hole and spend tons of money to find a problem that really isn’t one at all. But - you really don’t want to continue to drive something with an imminent failure under the deck lid.
Any experiences are of interest.
Thank you.
A-ha!
Thank you, sir. Next step was going to be poking around with a stethoscope. Now I have someplace to target.
Wonder if Porsche gave any support to owners for such a problem. Probably a non-issue as the car is 15 years old.....
Would sure hate to need to put replacement, high-flow cats onto the vehicle.......
Applies to all cars in the US
Catalytic Converters are emission control devices which are designed to last the life of the vehicle and do not normally require replacement. Furthermore, if the vehicle is properly used and maintained, original converters are covered by the emission control warranty for 8 years or 80,000 miles.
Update:
Spent a little time checking the exhaust over yesterday.
Looks like it’s just a loose muffler tip.
Will be snugging it up just as soon as I have a chance to mess with it when cold.
Very much relieved.
