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911uk

Bearing ? noise on `03 turbo

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHBearing ? noise on `03 turbo

Reported or suspected cause

found :thumb

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 · Original poster

I will update when the problem is found :thumb:

Original post Read captured discussion
Bearing ? noise on `03 turbo
Frequently discussed work

Check levels

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

Power steering pump, check levels

Original post Read captured discussion
Bearing ? noise on `03 turbo
Read full discussion summary

Leading evidence: 'found :thumb' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'found :thumb' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check levels' (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.

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1 matching discussions · 7 captured posts examined · 0 partial discussions

Compare 4 other evidence results

two fold problem

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

Turned out to be a two fold problem

Original post Read captured discussion
Bearing ? noise on `03 turbo

Install alternator

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
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 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 · Original poster

Had a mate round with his 996 turbo to replace what we thought was a noisy alternator, already previously replaced a belt idler, fitted the alternator but still has what sounds like a noisy bearing.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Replace belt idler, fitted the alternator

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
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 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 · Original poster

Had a mate round with his 996 turbo to replace what we thought was a noisy alternator, already previously replaced a belt idler, fitted the alternator but still has what sounds like a noisy bearing.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Check levels

Suggestion or failed attempt

No successful repair reported for this finding.

0
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 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

Power steering pump, check levels

Original post Read captured discussion
Bearing ? noise on `03 turbo
Frequently discussed actions (6)

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

Check levels

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

Power steering pump, check levels

Original post Read captured discussion
Bearing ? noise on `03 turbo

Install alternator

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 · Original poster

Had a mate round with his 996 turbo to replace what we thought was a noisy alternator, already previously replaced a belt idler, fitted the alternator but still has what sounds like a noisy bearing.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Replace belt idler, fitted the alternator

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 · Original poster

Had a mate round with his 996 turbo to replace what we thought was a noisy alternator, already previously replaced a belt idler, fitted the alternator but still has what sounds like a noisy bearing.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Run not immediately

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 · Original poster

The noise only starts after a few seconds of running not immediately on start up.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Use by date, lucky

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

Firstly the water pump bearing was well past it use by date, lucky for me I had a new spare from a previous car that didn't get fitted and secondly the Alternator bearing is loud on a cold start however runs ok once warm a job for over the winter.

Original post Read captured discussion
Bearing ? noise on `03 turbo

Use car

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

Also had the car serviced and a good look over, just need the summer to arrive and start using the car.

Original post Read captured discussion
Bearing ? noise on `03 turbo
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.

found :thumb

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 · Original poster

I will update when the problem is found :thumb:

Original post Read captured discussion
Bearing ? noise on `03 turbo

two fold problem

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 a two fold problem

Original post Read captured discussion
Bearing ? noise on `03 turbo
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.

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

  • 911uk: 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Asking for a friend ...... Had a mate round with his 996 turbo to replace what we thought was a noisy alternator, already previously replaced a belt idler, fitted the alternator but still has what sounds like a noisy bearing. The noise only starts after a few seconds of running not immediately on start up. Any ideas ? It appears to be from the left side of the engine. No specialists where we live without an expensive ferry ride so any help appreciated :dont know:

POST 2Original post

the secondary air pump? A/C compressor, but that's on the right? Power steering pump, check levels water pump, that's on the left

POST 3Original post

Similar post somewhere in this section, diagnosed as a timing chain tensioner. :dont know:

POST 4Original post

When trying to find noises, I use a 1m length of fuel pipe or similar, stick one end against your ear and move the other end around, you will pinpoint it in seconds if it is a bearing. MC

POST 5 / ORIGINAL POSTEROriginal post

Thanks guys, the owner has decided to book it in with a specialist. I will update when the problem is found :thumb:

POST 6Original post

This is a really good tip. P.s. Pretty sure secondary air pump is on the right in turbo. Left on M96 engine cars

POST 7Original post

The Fix Hi all Turned out to be a two fold problem The car went to Cavendish Porsche yesterday had a slow but steady drive there and and a very wet but fun drive back down south. Firstly the water pump bearing was well past it use by date, lucky for me I had a new spare from a previous car that didn't get fitted and secondly the Alternator bearing is loud on a cold start however runs ok once warm a job for over the winter. Also had the car serviced and a good look over, just need the summer to arrive and start using the car.

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