9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLoss of tyre pressure
Leading reported evidence
Use bead seal product
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
I got the guys to remove tyre and they just cleaned inside the lip of alloy (sometimes paint or residual rubber from lip of old tyre) and used a bead seal product.
Leading evidence: 'Use bead seal product' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'less expansion' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace according' (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
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
I think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
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 suspect 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.
Suspected cause
I think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
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
All gases, as I recall from school chemistry lessons, change according to Boyle's Law and Charles Law.
Use nitrogen, they charge about £2 per wheel and say
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
The oxygen molecules do leak through the rubber, my local tyre specialist recommends using Nitrogen, they charge about £2 per wheel and say that it can last for the life of the tyres, baring punctures.
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
I got the guys to remove tyre and they just cleaned inside the lip of alloy (sometimes paint or residual rubber from lip of old tyre) and used a bead seal product.
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
I think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
Use nitrogen, they charge about £2 per wheel and say
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 oxygen molecules do leak through the rubber, my local tyre specialist recommends using Nitrogen, they charge about £2 per wheel and say that it can last for the life of the tyres, baring punctures.
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 think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
less expansion
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect 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.
Suspected cause
I think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
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.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I had a rear that was the same and the removal and refitting cured it..
One of the rear tyres on my 996 Turbo is consistently losing air, about 2 lbs a week. I can't find anything like a nail in the tyre surface.
I assume the valve is faulty. Is it possible to have the valve replaced to cure this ? Would it be best to take it to the Independent garage I bought the car from, rather than a fast fit tyre place ?
I have had a similar problem, it turned out to be air escaping through the ally, a good tyre many will be able to tell you. To check the valve you could (this bit is not tasteful) put some spit on your finger and once the valve cap is off put the spit on the top off the vale to see if it bubbles up.
Sometimes it can be as simple as having the tyre reseated...
I had a rear that was the same and the removal and refitting cured it.. why??? no idea, possibly dirt
garyw
I had a similar issue on a brand new tyre. I got the guys to remove tyre and they just cleaned inside the lip of alloy (sometimes paint or residual rubber from lip of old tyre) and used a bead seal product. No issue since.
Another thing to consider is how old is the tyre, sometimes with age tyres can start to leak small amounts of air through small virtually invisible nicks from pure use.
The oxygen molecules do leak through the rubber, my local tyre specialist recommends using Nitrogen, they charge about £2 per wheel and say that it can last for the life of the tyres, baring punctures.
I think you'll find the use of Nitrogen is due to less expansion when temperatures rise (hence more consistent tyre pressure, especially when used for competition), compared to a regular 'air' mixture.
Normal air in tyres is not pure Oxygen anyway - air contains approx 78% Nitrogen and 21% Oxygen.
And in any case Nitrogen has only 7 protons and 7 neutrons, rather than 8 of each with Oxygen, so N atoms are smaller than O ones.
I think you might find this interesting
http://www.tyresave.co.uk/nitrogen.html
All gases, as I recall from school chemistry lessons, change according to Boyle's Law and Charles Law. If you heat the gas and keep the volume pretty much constant (as inside the tyre) then the pressure will increase. As I understand it the problem with "ordinary" compressed air is the amount of water vapour present. The nitrogen used to inflate tyres (aircraft and cars) has a very low water content and the change in pressure due to heating is less as a result. It appears that "dry" air would have the same effect nitrogen in maintaining pressure. Put "water vapour tyre pressure" into Google - it will keep you amused for a bit!![
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