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Knocking rattle only when hot

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

Discussion summary

YOUR RESEARCHKnocking rattle only when hot

Leading reported evidence

Check exhaust tips

Suggestion or failed attempt

No successful repair reported for this finding.

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Suggestion

Also check your exhaust tips for tight.

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Knocking rattle only when hot
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Leading evidence: 'Check exhaust tips' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check exhaust tips' (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.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Check exhaust tips

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

Also check your exhaust tips for tight.

Original post Read captured discussion
Knocking rattle only when hot
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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.

4 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.

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Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey guys, I�m getting a knocking kind of rattle which sounds like it�s coming from under the car, but here�s the weird thing. It only happens after I�ve been driving for a while and only on hot days. Any thoughts? Could it be related to AC lines? Thanks!

POST 2Original post

Probably not an ac line. May be exhaust...muffler or cats coming apart?

POST 3Original post

Quotes source post: 19613156

+1 Pop the cats with a rubber mallet. See if you hear a rattle. You might need to disco/loosen one flange side to set up more vibration. I had a cat core that didn�t manifest it had separated until I took it off and shook it. Also check your exhaust tips for tight.

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 19613877

Tried the rubber mallet trick on the cats, left one had a bit of a rattle reverberating when I hit it.

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