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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHBoxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Check each idler+tensioner bearing and alternator

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Unsuccessful attempts: 1
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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

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Suggestion
Remove the serp belt and run it briefly to listen.If no noise check each idler+tensioner bearing and alternator .
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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Check each idler+tensioner bearing and alternator' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check each idler+tensioner bearing and alternator' (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 every component

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Suggestion
If not, remove the v-rib belt and check every component.
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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Clean belt and components

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Suggestion
You can also clean the belt and components.
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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace frequency if you hit the gas pedal

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Suggestion
But that doesn't change frequency if you hit the gas pedal.
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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run engine

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Suggestion
Also you can run the engine for a short time without v-rib belt just to check if the noise is gone with no v-rib belt.
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Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (5)

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Check each idler+tensioner bearing and alternator

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
Remove the serp belt and run it briefly to listen.If no noise check each idler+tensioner bearing and alternator .
Original post Read captured discussion
Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check every component

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
If not, remove the v-rib belt and check every component.
Original post Read captured discussion
Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Clean belt and components

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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.

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Suggestion
You can also clean the belt and components.
Original post Read captured discussion
Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace frequency if you hit the gas pedal

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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
But that doesn't change frequency if you hit the gas pedal.
Original post Read captured discussion
Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run engine

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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 you can run the engine for a short time without v-rib belt just to check if the noise is gone with no v-rib belt.
Original post Read captured discussion
Boxster Whine - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

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

986Forum: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey guys....my Box has always had a very slight whine to it - but lately that has grown and gotten loud, at times. Don't notice it at idle - but as soon as you feed some gas, it shows up loud and proud. Power steering maybe? I can't quite figure where the sound is coming from. The sound is very similar to the youtube video below - but more pronounced as you press the accelerator, either stationary or moving. Thanks! https://www.youtube.com/watch?v=DhC_QKdBkdE 2011 Boxster PDK 2.9L

POST 2Original post

If it varies with RPM, maybe your accessory belt?

POST 3Original post

or idler bearings Remove the serp belt and run it briefly to listen.If no noise check each idler+tensioner bearing and alternator . Pelican has a good diy on this

POST 4Original post

Hello Giller, the noise you hear in the video directly after startup is the SAI. But that doesn't change frequency if you hit the gas pedal. As Gelbster said, remove the panel behind the seats and start the engine (2011 987 II has this also). Maybe you can locate the noise immediately. If not, remove the v-rib belt and check every component. Also you can run the engine for a short time without v-rib belt just to check if the noise is gone with no v-rib belt. So it will be caused by something else. The noise can also be caused by the v-rib belt itself. So check it for wearing signs. If it is weared, replace it. You can also clean the belt and components. The v-rib belt and all belt pulleys have to be clean. Don't use any oils like WD40. Everything has to be oil free. Regards, Markus

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