Planet-9

External Rear Metallic Rattle @ 1700rpm

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Original source

5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHExternal Rear Metallic Rattle @ 1700rpm

Leading reported evidence

Check heat shield

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 the heat shield, it may be loose or touching the muffler.
Original post Read captured discussion
External Rear Metallic Rattle @ 1700rpm

Read full discussion summary

Leading evidence: 'Check heat shield' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check heat shield' (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.

Read captured replies

1 matching discussions · 5 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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

Check heat shield

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
Check the heat shield, it may be loose or touching the muffler.
Original post Read captured discussion
External Rear Metallic Rattle @ 1700rpm

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.

Planet-9: 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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I have an 09 CS PDK and recently noticed when I'm cruising along and then I start to accelerate, between 1600 - 1700 rpm, I hear a metallic rattle coming from the rear. It sounds like a screw is rattling around the muffler area, but only happens for a second or two at most in that 1700 rpm range. Anyone encounter this and have any idea what it could be? Thanks.

POST 2Original post

Check the heat shield, it may be loose or touching the muffler.

POST 3Original post

Thanks Gasman, I'll check it out when I get the chance.

POST 4Original post

Might also be an internal baffle that broke lose or a bad cat.

POST 5Original post

My 06 CS makes the same noise, but it's more like 2,100 RPM during mild acceleration or float throttle. I hoped it would go away after installing a Milltek cat-back system, but it's still there. Now I suspect it's the cat on the passenger side header. My car is off warranty, but emissions devices are covered longer. If I can prove it's the cat I might get the dealer to replace it under the emissions warranty.

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