8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHEngine Chirp when warm
Reported or suspected cause
throwout bearing
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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 report identifying a cause
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
I took mine to the mechanic yesterday and he confirmed it was the throwout bearing.
Leading evidence: 'throwout bearing' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'throwout bearing' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check spark plug torque and look' (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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Check spark plugs and they were tight� thinking i may
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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Unsuccessful attempts
1
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Performed · outcome unconfirmed
I checked the spark plugs and they were tight� thinking I may replace the gaskets between the cats and headers as the only things that were changed before I discovered this noise was new top gear 200 cell cats and spark plugs/coil packs.
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.
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Suggestion
I�d start simple like check spark plug torque and look for any exhaust leaks before pulling parts apart.
Check spark plugs and they were tight� thinking i may
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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.
Performed · outcome unconfirmed
I checked the spark plugs and they were tight� thinking I may replace the gaskets between the cats and headers as the only things that were changed before I discovered this noise was new top gear 200 cell cats and spark plugs/coil packs.
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.
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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all, my relatively new to me high mileage (128k) 99 c2 has a chirp when warm. It�s on the passenger side near the headers. I�m thinking based on searches that it�s possibly a loose spark plug or exhaust gasket. Any ideas before I start going at stuff would be appreciated!
thanks!
-michael
I hear a chirp and also a faint tick at the same time, suggesting it could be a loose plug or a tiny exhaust leak. Piston slap would be a similar cadence, but a different tone.
was this ever solved? I have this same noise, only once the engine is warmed up. It�s been driving me nuts. I checked the spark plugs and they were tight� thinking I may replace the gaskets between the cats and headers as the only things that were changed before I discovered this noise was new top gear 200 cell cats and spark plugs/coil packs. I also had the IMs solution installed but I don�t think that would be related to this noise.
any opinions on the �metal sandwich� gaskets that came with the cats vs the factory metal gaskets?
A chirp like that on a 99 C2, especially warm and near the headers, is often one of a few usual suspects. Loose spark plugs are definitely a common culprit, sometimes just a tiny bit of play will make that metallic chirp as the engine heats and parts expand. Exhaust gaskets can do it too, especially if they�re starting to leak at the header or downpipe flanges.
I�d also keep an ear out for any pulley or belt noise on that side, though less common, a highpitched chirp can come from a tensioner or accessory bearing once the engine�s warmed up. I�d start simple like check spark plug torque and look for any exhaust leaks before pulling parts apart. That usually saves a lot of unnecessary work.
Mine chirped until you touched the clutch. Drove it a few hundred miles then it let go. Took it to the local indy and he will be installing a new clutch kit and pressure plate (the latter cracked).
yep sounds like the same issue. Chirped until you put any pressure on the clutch pedal. I took mine to the mechanic yesterday and he confirmed it was the throwout bearing. He�s installing a new clutch kit today/tomorrow.
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