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Bad engine noises at specific RPM ranges?

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YOUR RESEARCHBad engine noises at specific RPM ranges?

Reported or suspected cause

broken baffle in one of the mufflers

Reported cause

No successful repair reported for this finding.

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Reported cause

I had a scary noise in mine when I first got it, turned out to be a broken baffle in one of the mufflers.

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Bad engine noises at specific RPM ranges?
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Leading evidence: 'broken baffle in one of the mufflers' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'broken baffle in one of the mufflers' (1 discussions; 1 report identifying it and 0 suggest it). 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 · 12 captured posts examined · 0 partial discussions

Reported and suspected causes (1)

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broken baffle in one of the mufflers

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying 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.

Reported cause

I had a scary noise in mine when I first got it, turned out to be a broken baffle in one of the mufflers.

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Bad engine noises at specific RPM ranges?
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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.

12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

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Generation: 20261026T083035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

It is like clockwork. At exactly 2,200-2,300 & 3,200-3,300 & 4,100-4200 RPM there is a metal on metal sound . Increasing and decreasing RPM has the same result. Does anyone have an idea of what could be causing this?

POST 2Original post

i feel i have the same problem. i can feed the metal2metal vibration on the streeing wheel. my car is 996 MY2001 3.4 tip, 50KMile. last oil change was last year spring.....

POST 3 / ORIGINAL POSTEROriginal post

i can't feel it, just hear it - and it does NOT sound good.

POST 4Original post

Hmmm might be slight knocking (click noise) especially at lower RPMs which I understand is normal operation

POST 5Original post

If you're lucky, some junk rattling inside a cat. If you're not, a resonant timing chain vibration?

POST 6Original post

That's where I'd look first. I had a scary noise in mine when I first got it, turned out to be a broken baffle in one of the mufflers. Don't panic yet.

POST 8Original post

my car also makes a big metal to metal noise when starting up, if it sits for a few days. could be the timing chain.....

POST 9Original post

why are you reving the car in neutral, what are you hoping to acomplish. timing chain vibration engine knocking......where do you guys come up with this stuff

POST 10Original post

Are you drinking again Brad? No one said anything about reving the car in neutral.

POST 11Original post

Just to enjoy the lovely symphony of a flat six would be my guess.

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