12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFunny Fan noise at startup
Leading reported evidence
Replace air pump system in my00
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Leading evidence: 'Replace air pump system in my00' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check markings' (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 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 think the newer design is quieter than what was used on the MY98 and 99.
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
You can check the markings on the pulley and or look at the contact side of the belt to see if it's glazed and or shinny.
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
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: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
What's this high pitch fan (?) noise that comes in when i start the car and only lasts for a couple of minutes? It sounds like a kitchen blender sort of! It's nothing like the wing-fan or the front-radiator-fan, what can it be?
\\W//
996 C2 99
It could also be a bad fan belt making that noise until it warms up. It can occur not only from misalightment but if it is glazed. You can check the markings on the pulley and or look at the contact side of the belt to see if it's glazed and or shinny. I don't know much about the air pump, but I have heard belts makes that weird noise.
Cant be a belt, it sounds like a very fast fan whining. It happens only when cold at startup. And it lasts exactly the same time.
Wondering, Loren! Any clue!?
Waz
You are likely hearing the (electric) air pump. This pump comes on to aid in emissions at startup until the engine (and exhaust gases) reach a certain temperature. It can also sometimes be heard at idle (like at a stoplight). This is normal.
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Carlos where do you get these!?!!
Waz
This is a source reference. Confirm exact model applicability in the original material.
