18 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHwrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Leading reported evidence
Use wrong tyre pressures
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 am using the wrong tyre pressures from the manual (i.e.
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Read full discussion summary
Leading evidence: 'Use wrong tyre pressures' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'dealer didn't check' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check against a boxter' (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 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
Likely the dealer didn't check when cold and over inflated a bit.
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Check against a boxter
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
Check against a boxter which came with the 18s when it left the factory.
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Check pressures
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 may be doing this already, but apart from checking pressures when cold also use a decent pressure gauge.
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Check when cold
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
Sorry Dom I assumed they would be the same as for the 996, I bow to your greater knowledge, just a thought back to the original question, were the pressures checked when cold ??
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Check when cold
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
Sorry Dom I assumed they would be the same as for the 996, I bow to your greater knowledge, just a thought back to the original question, were the pressures checked when cold ??
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
Run on 18" carreras, upon
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
i've got a boxtser s running on 18" carreras, upon checking the manual it recommends 2 and 2.5 bar (29 and 36 psi) for the front and rear tyres when cold.
wrong tyre pressures from dealer???? - Page 1 - Porsche General - PistonHeads UK
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.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
carrera 18 inch wheels ......VERY NICE, I think you will find that they should be 44 at the rear on 18's
I used to have a 996 with them on & they were definitely 44 at the rear,pretty sure the 36 is for 17's only. How much did the new wheels set you back with tyres ??
Errr, surely the pressure is more dependent on the car than the tyre?
A 996 has a lot more weight over the rear wheels than a Boxster, hence 44 psi.
I wouldn't imagine the pressure would be much different with 18s than 17s. Maybe a tad higher, but not by more than a few psi.
Sorry Dom I assumed they would be the same as for the 996, I bow to your greater knowledge, just a thought back to the original question, were the pressures checked when cold ??
Under the front bonnet is a sticker listing what the pressures should be.
AFAIK its 36 at the back regardless of rim size.
Likely the dealer didn't check when cold and over inflated a bit. I wouldn't lose too much sleep over it - after all, you checked yourself and found a discrepency.
Ignore Domster BTW - anything later than a 964RS and he's probably guessing anyroad
Are tyre pressures not part of the PDI? in which case what else have the garage forgot to do?
DAZ
>> Edited by dazren (moderator) on Monday 7th July 20:54
thx for replies,
so a lower profile tyre has the same pressure as the stnd 17"? sounds a little odd.
the 18" carreras were no more than £700ish? a different set were on the car at new and i refused to buy it unless they swapped them over to the best looking boxster alloys!
In this instance the pressure rating found under the bonnet or inside the petrol flap on the 996 will have the pressures stated for the alloys on the car when it left the factory. Check against a boxter which came with the 18s when it left the factory.
Can anyone in PHland with the correct spec Boxster confirm the pressures on 18 inch alloys?
DAZ
You may be doing this already, but apart from checking pressures when cold also use a decent pressure gauge. I checked mine at the weekend on a garage forecourt and they were about 7psi different to that shown on my own gauge.
Cheers
Andy
It's an odd quirk of 'free' compressed air pumps on garage forecourts that they don't have to be accurate, and so rarely are. Digital gauges are very accurate and seem to last a long time - I've had one 10 years, and it still works on the original (non-replaceable) battery.
on mine theres a list of tyre sizes and presures on the fuel flap, not that Ive read it yet...Maybe I should...
And yes always use your own presure gauge not the garage ones as they are not accurate
I would take issue with your statement, as an ex manager of petrol stations, all our airlines were regularly checked and calibrated. This was based on the fact that the garage could be found negligent if an accident was found to be caused by incorrect tyre pressures following inflation from our airlines.
your garage appeas to be an exception to the norm kevin in terms of accuracy....I thought thay were regulated by the authorities but had a 10% tolerance margin.
When you have 44 pound rear tyres on your porker,,,to the nearest 10% you would possibly be closer guessing than relying on a guage that may be that far out.
allways use my own digital measurer when using the forecorurt air pumps. Some at fourcourts are fine and accurate but some are badly out. - unless my dig is badly out!
most forecourt air pumps seem to be out of order these days... maybe it is less hassle to have them out of service than keep them legally calibrated? :conspiracytheoryhaton:
One for Mulder and Scully
My local optimax dealer has a digital tyre pressure machine where you put in the pressure you want, press the button and allah kazam! The readings match my tyre pressure gauge purchased for about £13 from my OPC. Oh and the petrol station next to the Ring, their tyre pressure reading is also accurate according to my gauge!
DAZ
i've got a boxtser s running on 18" carreras, upon checking the manual it recommends 2 and 2.5 bar (29 and 36 psi) for the front and rear tyres when cold.
went and checked mine today and the rears were at 3 bar (nearer 40odd psi) and one of the fronts was near 2.5.
I am using the wrong tyre pressures from the manual (i.e. are they for the 17" tyres that the car comes with as std) or have the dealership pumped my tyres up far too much?
This is a source reference. Confirm exact model applicability in the original material.
