Planet-9

987.1 Whirring Humming Noise 2K RPM ?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH987.1 Whirring Humming Noise 2K RPM ?

Reported repair

Replace pump

Reported resolution

1
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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 a fix: 1

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix
A pump replacement solved the issue.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Read full discussion summary

Leading evidence: 'Replace pump' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, the most frequently mentioned possible cause is 'gearbox' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace pump' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Replace pump', supported by resolution reports in 1 discussions. 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 · 12 captured posts examined · 1 partial discussions

Compare 4 other evidence results

gearbox

Reported cause

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
It was the gearbox.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

water pump failing

Reported cause

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
Turned out to be my water pump failing.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace flywheel was found

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
Flywheel was found to have excessive play so that was replaced too along with the clutch.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace slightly

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
The noise changed slightly after changing the gearbox oil.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Frequently discussed actions (7)

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

Replace pump

1
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report a fix: 1

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix
A pump replacement solved the issue.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Check there first

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
I'd check there first.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace flywheel was found

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
Flywheel was found to have excessive play so that was replaced too along with the clutch.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace gearbox oil

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
The noise changed slightly after changing the gearbox oil.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace noise is less apparent

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
After a gearbox oil change the noise is less apparent but still there.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Replace slightly

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
The noise changed slightly after changing the gearbox oil.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Test 2 weeks ago

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
Wheel bearings fine at MOT test 2 weeks ago.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Reported and suspected causes (2)

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

gearbox

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
It was the gearbox.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

water pump failing

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
Turned out to be my water pump failing.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K RPM ?

Actions with reported resolution accounts (1)

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

Replace pump

1
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report a fix: 1

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Reported fix
A pump replacement solved the issue.
Original post Read captured discussion
987.1 Whirring Humming Noise 2K 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.

12 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.

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

Generation: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Good evening, First post, virtual beers on me ! 2007 987.1 2.7 Manual. Strange whirring pulse type noise behind my left side when driving, RHD. Occurs under load between 1800 & 2100 rpm. Then disappears. Can't hear it if the car is stationary at the same engine speed. Car stops & goes like a dream. No mention of wheel bearings at the MOT 2 weeks ago. Drive shaft ? Gearbox ?

POST 2Original post

Many years ago I experienced a loud "whirring noise", off and on, that got progressively louder over a few days. Turned out to be my water pump failing. By the time I got to the mechanic, it sounded like a jet engine powering up, lol. A pump replacement solved the issue. I'd check there first. Good luck and keep us posted.

POST 3Original post

Thanks for the advice. The noise is not getting louder. The car has had a new water pump at 75k. Mileage now 110k.

POST 4Original post

Noisy rollers or tensioner bearing or the serpentine belt itself? Were the wheel bearings specifically checked? How many miles on your car?

POST 5Original post

Wheel bearings fine at MOT test 2 weeks ago. I swopped the wheels over, noise stayed the same side. Does the serpentine belt run at a constant speed ?

POST 6Original post

Serpentine belt is parasitic drag, it's not static speed it's variable, just the clutches in the AC compressor alone would vary the speed. It's just a WAG anyway. How many kilometers / miles are on the car? Pulsing noise is difficult for me to interpret. If the car runs nice, which you mentioned it did, it runs at the proper temperature and maintains oil level within Porsche guidelines then run it; enjoy it.

POST 7Original post

101k miles on the car. It’s the first Porsche & mid engined car I’ve owned. This may be just a characteristic of this flat 6 engine ?

POST 8Original post

Injectors can make pulsing noises, valves can be a little noisy especially at that mileage, just enjoy it.

POST 9Original post

@Geoff888 - Welcome to Planet-9, the thinking Porsche owner's alternative to Facebook. Please visit New Member Introductions when you have a chance and show us some pics of your Porsche, preferably in it's native environment

POST 10Original post

Have taken this further. After a gearbox oil change the noise is less apparent but still there. My mechanic has sourced a replacement gearbox from a lower mileage car. While doing the clutch & RMS at the same time, the flywheel was found to have loads of play, So it's a new flywheel too. I hope this is it !

POST 11Original post

It was the gearbox. The noise changed slightly after changing the gearbox oil. Replacement box sourced from a lower mileage car. Flywheel was found to have excessive play so that was replaced too along with the clutch. Noise gone.

POST 12Original post

Thanks for getting back to us with the "cure" - it adds to the hive-knowledge since that's one I haven't heard of before..

This is a source reference. Confirm exact model applicability in the original material.