9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHUnwanted Noise from engine area?
Reported or suspected cause
'v-belt' or polyrib belt
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.
Leading evidence: ''v-belt' or polyrib belt' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is ''v-belt' or polyrib belt' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check of the belt' (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.
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
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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
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Suggestion
The Minor service does not include a check on the belt, but the Major service includes the removal and checking of the belt.
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.
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Suggestion
The Minor service does not include a check on the belt, but the Major service includes the removal and checking of the belt.
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
Also, if this belt is slipping and drives the auxiliaries, should this be changed on the cars Porsche warranty?
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.
Porsche Club GB: 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: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I hope that someone out there might be able to help me!
I have a 2005 mdel year 996 C4S and until now it has proved most reliable.
A couple of weeks ago whilst driving with the windows down, I heard a noise coming from the engine area that sounded a little like a slipping belt (a light squealling).
This noise has now happened a couple of times since. My local dealer took the car in to have a look, but typically, the car behaved impeccably whilst it was in and made no noises at all.
The noise seems to only happen for a couple of seconds and mostly when the car is pulling away (when the engine has been warm and has recently been re-started). Which is embarrasing to say the least, as it sounds even worse from the pavement.
I have booked the car back in to my Porsche centre, but they have said that unless they know what to look for (or hear the noise themselves) they cannot begin to fix the problem.
Has anyone had a simular problem and if so how was it dealt with?
The car is still under the manufactures warranty.
It could be that it's a noise from the clutch. I get a 'squeel' sometimes when the engine is hot and I've been stop-starting. (London traffic)
Something that doesn't happen a lot, but pretty reliably if in London, or the M25, or the A2, or M20, or any darn UK road !
I agree with Richard, it happened to my car as well. It was the 'V-belt' or polyrib belt. Get it seen to sooner rather than later as if it slips off, you will lose power steering, and cooling to the engine (among other things).
Hi Dillon. I'm not sure whether this is any help to you but I also get a squeal from my polyrib belt - just ater I've washed the car. This never happens on any other occasion, so I'm not sure if it's the same thing as you have. If it is the polyrib then it could be that your tensioner is not as it should be or that you have oil on the belt itself? Mine almost certainly does it because it is wet. Adrian.
Hi,
I dont think it is the clutch, as I have had the car for eighteen months and have never had such a noise before (I do a lot of City driving). Further to this, I am sure the clutch wasnt 'engaged' when the noise appears.
Also the car was serviced (major) about two months ago and the clutch was fine.
But it is an interesting point. Thank you.
With the 'Polyrib Belt' would this have been covered when the dealer 'tightened' the belts when it went in?
The noise continued after they had tighted the belts, so I presume that the belt that your refering to is different?
Also, if this belt is slipping and drives the auxiliaries, should this be changed on the cars Porsche warranty?
The belt cannot be "tightened". It has an automatic spring tensioner. The Minor service does not include a check on the belt, but the Major service includes the removal and checking of the belt.
What tends to happen is that the rib surfaces tend to glaze, and the grip is reduced resulting in slippage and squealing. The belt is only £20.09, and it takes about 15-20 minutes to cahnge, so it might be worth considering getting that done.
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