fullymatted.
Back to search
911uk

Noisy alternator

Add to repair workspace
Open repair workspace
Original source
10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHNoisy alternator

Leading reported evidence

Check belts

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

I've checked the belts.

Noisy alternator
Read full discussion summary

Leading evidence: 'Check belts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check belts' (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 · 10 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Lubricate bearings, have a look at

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

You can lubricate the bearings, have a look at

Noisy alternator

Lubricate with talcum powder or chalk

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

Belt squeak - in my opinion caused by a stretched belt - lubricate with talcum powder or chalk.

Noisy alternator

Replace belt

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

surely it would be better to replace the belt?

Noisy alternator

Run quietly currently

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 · Original poster

But everything is running quietly currently...

Noisy alternator
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 belts

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

I've checked the belts.

Noisy alternator

Lubricate bearings, have a look at

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

You can lubricate the bearings, have a look at

Noisy alternator

Lubricate with talcum powder or chalk

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

Belt squeak - in my opinion caused by a stretched belt - lubricate with talcum powder or chalk.

Noisy alternator

Replace belt

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

surely it would be better to replace the belt?

Noisy alternator

Run quietly currently

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

But everything is running quietly currently...

Noisy alternator

Run unless you want a very spotty shirt

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

Spray grease provides a more permanent fix but don't do it with the engine running unless you want a very spotty shirt!

Noisy alternator
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.

10 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

From time to time when I start up the alternator sounds a bit screechy, like something is dry or a maybe a bearing is on the way out. Disappears after a decent run. I'm not TOO bothered by it and will mention it to JZ when the car goes in to have a few little things put right at the end of the month. But in the meantime, anyone got a view? Migration info. Legacy thread was 26473

POST 2Original post

Belt squeak - in my opinion caused by a stretched belt - lubricate with talcum powder or chalk. Migration info. Legacy thread was 26475

POST 3Original post

surely it would be better to replace the belt? if it is stretched ? Migration info. Legacy thread was 26480

POST 4 / ORIGINAL POSTEROriginal post

Interesting. I've checked the belts. All look in good nick and nice and tight. Experimenting with talc is cheap enough. What about Warren's point, though? Migration info. Legacy thread was 26482

POST 5Original post

maybe the talc idea is just a temporary solution? Migration info. Legacy thread was 26487

POST 6Original post

Maxy, It may be the fan roller bearings, they are prone to squeal a little, have had this problem myself and noticed it mainly when the engine had just been fired up, disappeared after a run. You can lubricate the bearings, have a look at http://p-car.com/diy/roller/ John Migration info. Legacy thread was 26493

POST 7 / ORIGINAL POSTEROriginal post

Cheers, John. I'll investigate. Migration info. Legacy thread was 26503

POST 8Original post

quieten it with wd40 ? Migration info. Legacy thread was 26505

POST 9Original post

This happens intermittently on my 96 993 C2, instant cure is a quick squirt of WD40 in the general direction of the alternator/fan belt. Spray grease provides a more permanent fix but don't do it with the engine running unless you want a very spotty shirt! Migration info. Legacy thread was 26547

POST 10 / ORIGINAL POSTEROriginal post

Thanks fellas. The p-car fix loks a bit involved. WD40 sounds like an easier - if temporary - fix. But everything is running quietly currently... Migration info. Legacy thread was 26765

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