Planet-9

Help w/ Dx: Strange engine noise at 3K rpm

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Original source

9 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHelp w/ Dx: Strange engine noise at 3K rpm

Reported or suspected cause

idler pulley

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

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

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
They said it was the idler pulley.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Frequently discussed work

Replace before it completely fails

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
You want to get it replaced before it completely fails.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Read full discussion summary

Leading evidence: 'idler pulley' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'idler pulley' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace before it completely fails' (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.

Read captured replies

1 matching discussions · 9 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Replace before it completely fails

Performed · outcome unconfirmed

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
You want to get it replaced before it completely fails.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Replace idler pulley and the water pump

Performed · outcome unconfirmed

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
So they replaced the idler pulley and the water pump that they said was a bit on the loud side.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Run gear related

Suggestion or failed attempt

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, it is running gear related.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace before it completely fails

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
You want to get it replaced before it completely fails.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Replace idler pulley and the water pump

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
So they replaced the idler pulley and the water pump that they said was a bit on the loud side.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Run gear related

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, it is running gear related.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

idler pulley

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
They said it was the idler pulley.
Original post Read captured discussion
Help w/ Dx: Strange engine noise at 3K rpm

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.

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

Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

2 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link
Get it fixed before it fails completely.
Original post Read captured discussion
No unique explicit quoted action; no causal link assigned

Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I wondering if anyone might know what the problem with my CS is... Recently my 07 CS with 30K miles on it started developing a dry howling noise around 2000 - 3200 rpm. It sounds like its coming from the intake side of the engine. The oil reads at 3/4 full and the last change was done by a dealership about 10K mi ago. Nothing has been done to it recently. I am wondering if maybe the air filter needs changing or something of that sort or if should just take it into a dealer. I was hoping it would go away after a day or two to no avail. Any help is appreciated. Thanks Todd

POST 2Original post

Your car has such low mileage, but when a wheel bearing starts to go, it may make a similar sound. Does it change in tone with increasing speed/rpm?

POST 3Original post

First and foremost, take it to a dealer. Do not pass go, do not collect $200. Take it to a dealer. Like Pete says, dry howling noises could be a bearing going bad. If it is a bearing, it won't take long to go from bad to worse. You want to get it replaced before it completely fails. Given the location you mention, intake side of the engine, I wonder if maybe one of the serpentine belt pulleys is going bad. You don't want a wheel bearing or belt pulley bearing to suddenly lock up completely. It could also be a power steering pump or alternator (which of those is on the intake side?). Same for these: you don't want your alternator to suddenly lock up or cook itself due to friction. It is quite possible that this noise is just a worn belt or something simple (does it go away when the car warms up?). On the other hand, it could be something more serious. Get it fixed before it fails completely.

POST 4Original post

OK I'll take it iin. Thanks for the help. Also, I mis-typed in my previous entry, it only really shows up from 3000-3200 rpm. I'll let you know what the verdict is. Thanks.

POST 5Original post

Can you reproduce it at a stand still? E.g. rev the engine to 3000-3200 while not moving? If it occurs when not moving, then it is engine related. If not, it is running gear related.

POST 6Original post

They said it was the idler pulley. I'm supposed to pick it up today, so we'll see. Thanks for all the guidance and help.

POST 7Original post

Glad it was something simple and found before something really broke! Thanks for reporting back.

POST 8Original post

Yes - thanks for reporting back. Sometimes you never hear what the actual issue was. An idler pulley is not something you want to seize up on you. Glad you got it fixed before that happened!

POST 9Original post

So they replaced the idler pulley and the water pump that they said was a bit on the loud side. They also insulated an area of the RR cabin that I had briefly mentioned was rattling a bit. Good people; problems solved. and they provided a loaner. Thanks to: Circle Porsche -Long Beach Alberto and Doug took good care of me. Todd

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